WO2022107554A1

WO2022107554A1 - Radiographic cassette housing device, method for operating radiographic cassette housing device, and radiation diagnosis device

Info

Publication number: WO2022107554A1
Application number: PCT/JP2021/039309
Authority: WO
Inventors: 圭司坪田; 淳榎本
Original assignee: 富士フイルム株式会社
Priority date: 2020-11-20
Filing date: 2021-10-25
Publication date: 2022-05-27
Also published as: JPWO2022107554A1

Abstract

This radiographic cassette housing device comprises: a holder for housing a radiographic cassette; an ultraviolet light source for irradiating the radiographic cassette housed in the holder with ultraviolet light; an ultraviolet light source controlling unit that causes the ultraviolet light source to stop ultraviolet light irradiation when a set time preliminarily set has elapsed after ultraviolet light irradiation is started; and at least one of a notification controlling unit that performs control for notifying information related to progress of sterilization of the radiographic cassette by ultraviolet light, and a removal prohibition controlling unit that performs control for prohibiting removal of the radiographic cassette from the holder before the set time has elapsed.

Description

Radiation imaging cassette accommodating device, radiography cassette accommodating device operating method, radiological diagnostic device

The techniques disclosed in the present disclosure relate to a storage device for a cassette for radiography, an operation method for the storage device for a cassette for radiography, and a radiological diagnostic device.

A radiation diagnostic device that irradiates a patient with radiation and obtains a radiation image is known. In the radiological diagnostic apparatus, a cassette for radiography is used. The radiographic cassette includes a CR (Computed Radiography) cassette in which an imaging plate is housed in a portable housing, or an electronic cassette in which a detection panel called a flat panel detector is housed in a portable housing. The radiography cassette is housed in a radiography table installed in the radiography room and used. In addition, the radiography cassette can be used in the radiography room by removing it from the radiography table and holding it to the patient, or it can be placed under the patient lying on the bed in the hospital room. It is used in. For this reason, the radiographic cassette may be contaminated with bacteria and / or virus adhering to it upon contact with the patient.

Japanese Patent Application Laid-Open No. 2013-248124 describes a mobile radiation generator that performs radiography (so-called round-trip radiography) while going around a hospital room as a radiodiagnosis device. The mobile radiation generator described in Japanese Patent Application Laid-Open No. 2013-248124 includes a holder for accommodating an electronic cassette, and the holder is provided with an ultraviolet source for irradiating ultraviolet rays. The electronic cassette housed in the holder is sterilized by being irradiated with ultraviolet rays for a preset time set by this ultraviolet source. Note that sterilization means inactivating bacteria and / or viruses.

Japanese Unexamined Patent Publication No. 2009-172243 describes a cradle for charging a battery built in an electronic cassette. The cradle is provided with a holder for accommodating the electronic cassette, and the holder is provided with an ultraviolet source for irradiating ultraviolet rays. Similar to Japanese Patent Application Laid-Open No. 2013-248124, the electronic cassette housed in the holder is sterilized by being irradiated with ultraviolet rays for a preset time set by an ultraviolet source.

In JP-A-2013-248124 and JP-A-2009-172243, the radiographic cassette such as an electronic cassette is taken out from the holder before the set time, and the radiographic cassette is used without sterilization being completed. No specific measures have been taken for the problem. For this reason, it was difficult to say that the effect of sterilization could be fully exerted even though the ultraviolet source was provided.

One embodiment according to the technique of the present disclosure is an accommodating device for accommodating radiographic cassettes and accommodating radiographic cassettes capable of suppressing the use of radiographic cassettes before sterilization by ultraviolet rays is completed. A method of operating the device and a radiation diagnostic device are provided.

The accommodating device for the radiographic cassette of the present disclosure includes a holder for accommodating the radiographic cassette, an ultraviolet source for irradiating the radiographic cassette housed in the holder with ultraviolet rays, and after the irradiation of ultraviolet rays is started. An ultraviolet source control unit that stops the irradiation of ultraviolet rays to the ultraviolet source when a preset set time has elapsed, a notification control unit that controls information regarding the progress of sterilization of the cassette for radiography by ultraviolet rays, and a notification control unit. It includes at least one of the removal prohibition control units that controls to prohibit the removal of the radiographic cassette from the holder before the set time elapses.

It is preferable that the notification control unit controls to notify the remaining time until the set time is reached as information.

The notification control unit attempts to remove the radiography cassette from the holder before the set time elapses, or when the radiography cassette is taken out from the holder before the set time elapses. It is preferable to perform control to notify as information a warning that sterilization by ultraviolet rays has not been completed.

It is preferable that the take-out prohibition control unit cancels the take-out prohibition of the radiography cassette from the holder according to the instruction of the operator.

There are a plurality of holders, and it is preferable that at least one of the notification control unit and the take-out prohibition control unit controls each of the plurality of holders.

It is preferable that the holder can accommodate a cassette for radiography in which a grid for removing scattered radiation is attached.

It is preferable to have a storage control unit that stores the irradiation time of ultraviolet rays in the storage unit.

There are a plurality of radiography cassettes, and it is preferable that the storage control unit stores the irradiation time for each of the plurality of radiography cassettes.

It is preferable that the ultraviolet source control unit switches between the normal sterilization mode in which the set time is relatively long and the rapid sterilization mode in which the set time is relatively short by changing the sterilization ability of ultraviolet rays according to the instruction of the operator. ..

It is preferable that the ultraviolet source control unit changes the sterilizing ability by changing at least one of the intensity and wavelength of ultraviolet rays.

The radiography cassette is preferably an electronic cassette in which the detection panel and the battery are housed in a portable housing, and is preferably a cradle having a function of charging the battery of the electronic cassette housed in the holder.

The radiological diagnostic apparatus of the present disclosure includes the accommodating device of the cassette for radiography described in any of the above.

It is preferable that a radiation source for irradiating radiation is mounted, a main body having wheels for traveling is provided, and a holder is provided in the main body.

It is equipped with at least one of a standing position shooting table for shooting the patient in a standing position and a lying position shooting table for shooting the patient in a lying position, and the holder is a standing position shooting table and a lying position shooting. It is preferable that it is provided on at least one of the tables.

The method of operating the accommodating device for the radiographic cassette of the present disclosure is a method of operating the accommodating device for the radiographic cassette including a holder for accommodating the radiographic cassette, with respect to the radiographic cassette accommodating in the holder. For irradiating ultraviolet rays from an ultraviolet source, controlling to stop the irradiation of ultraviolet rays to the ultraviolet source when a preset set time has elapsed since the start of irradiation of ultraviolet rays, and for radiography by ultraviolet rays. At least one of control for notifying information on the progress of sterilization of the cassette and control for prohibiting the removal of the cassette for radiography from the holder before the set time elapses. include.

According to the technique of the present disclosure, a method of operating a radiographic cassette accommodating device and a radiographic cassette accommodating device capable of suppressing the use of a radiographic cassette without completing sterilization by ultraviolet rays. , Radiation diagnostic equipment can be provided.

It is a figure which shows the mobile radiation generator. It is a figure which shows the rotation direction and the movement direction of a support column part, the movement direction of an arm part, and the rotation direction of a radiation source and an irradiation field limiter. It is the figure which looked at the console from the top. It is a figure which shows the electronic cassette. It is a figure which shows the holder part. It is a figure which shows the holder part. It is a block diagram of a holder part, a control device, and a console. It is a figure which shows how the set time is input to the ultraviolet source control part. It is a figure which shows the mode of irradiating ultraviolet rays by an ultraviolet source when the electronic cassette is housed in the holder, and the lid is closed. It is a figure which shows the mode that the irradiation of ultraviolet rays by an ultraviolet source is not performed when an electronic cassette is not accommodated inside a holder. It is a figure which shows the mode which stops the irradiation of ultraviolet rays to the ultraviolet source when the preset set time elapses from the start of irradiation of ultraviolet rays. It is a figure which shows the mode that the irradiation of ultraviolet rays to an ultraviolet source is stopped when a lid is opened before the set time elapses from the start of irradiation of ultraviolet rays. It is a figure which shows the information notification screen. It is a figure which shows the information notification screen when the lid is opened before the set time elapses after the irradiation of ultraviolet rays is started. It is a flowchart which shows the processing procedure of the accommodating apparatus of a cassette for radiography. It is a figure which shows the information notification screen when the electronic cassette is taken out from a holder after the set time elapses from the start of irradiation with ultraviolet rays. It is a figure which shows the electronic cassette of the 2nd Embodiment. It is a figure which shows the holder part of the 2nd Embodiment. It is a block diagram of the holder part of 2nd Embodiment and the accommodating device of the cassette for radiography. It is a figure which shows the aspect which prohibits the taking out of an electronic cassette from a holder during a set time when ultraviolet rays are irradiated from an ultraviolet source. It is a figure which shows the mode which releases the prohibition of taking out electronic cassette from a holder when the lock forced release switch is operated. It is a flowchart which shows the processing procedure of the accommodating apparatus of the radiography cassette of 2nd Embodiment. It is a figure which shows the grid and the electronic cassette. It is a figure which shows the holder which can accommodate the electronic cassette with the grid attached. It is a figure which shows the 4th Embodiment which stores the irradiation time of ultraviolet rays in the storage. It is a figure which shows the normal sterilization mode. It is a figure which shows the rapid sterilization mode. It is a figure which shows the radiation diagnostic apparatus provided with the standing position photographing table and the lying position photographing table. It is a figure which shows the standing holder and the standing tray. It is a figure which shows the holder for a recumbent position and the tray for a recumbent position. In the radiation diagnostic apparatus shown in FIG. 28, when the electronic cassette is housed inside the holder, the ultraviolet source is irradiated with ultraviolet rays, and when the set time elapses after the irradiation of the ultraviolet rays is started, the ultraviolet rays are applied to the ultraviolet source. It is a figure which shows the mode of stopping the irradiation of. In the radiation diagnostic apparatus shown in FIG. 28, it is a figure which shows the aspect which stops the irradiation of ultraviolet rays to an ultraviolet source when a tray is pulled out from a holder before the set time elapses from the start of irradiation of ultraviolet rays. .. It is a figure which shows the cradle. In the cradle shown in FIG. 33, when the electronic cassette is housed inside the holder and the lid is closed, ultraviolet rays are irradiated by the ultraviolet source, and the set time elapses after the ultraviolet irradiation is started. It is a figure which shows the mode of stopping the irradiation of ultraviolet rays to an ultraviolet ray source. In the cradle shown in FIG. 33, it is a figure which shows the aspect which stops the irradiation of ultraviolet rays to the ultraviolet source when the lid is opened before the set time elapses from the start of irradiation of ultraviolet rays.

[First Embodiment]
As an example, as shown in FIG. 1, the mobile radiation generator 2 is a device that irradiates a patient with radiation such as X-rays and γ-rays and captures a radiation image RI (see FIG. 3) of the patient. This is an example of a "radiation diagnostic device" related to the above-mentioned technology. The mobile radiation generator 2 is operated by an operator such as a radiologist. The mobile radiation generator 2 includes a main body portion 10, a support column portion 11, and an arm portion 12. Four wheels 13 are attached to the lower part of the main body 10 on the front, rear, left and right sides. The mobile radiation generator 2 can move in the medical facility by the wheel 13, and is used for so-called round-trip radiography in which a patient is photographed while rotating around a hospital room. Therefore, the mobile radiation generator 2 is also called a round-trip vehicle. In addition, the mobile radiation generator 2 can be brought into the operating room and radiographed during the operation.

The main body portion 10 includes a central portion 15 and a holder portion 16. The control device 20 and the console 21 are built in the central portion 15.

The holder portion 16 is arranged on the back surface of the central portion 15. The holder portion 16 has a holder portion main body 25 and a lid 26. The lid 26 can be opened and closed with respect to the holder main body 25 (see FIG. 5).

Holders

27A, 27B, and 27C are provided on the holder body 25. Each of the holders 27A to 27C accommodates one electronic cassette 30. There are a plurality of types of electronic cassettes 30 having vertical and horizontal sizes such as 17 inches x 17 inches, 17 inches x 14 inches, and 12 inches x 10 inches. The holders 27A to 27C can accommodate the electronic cassette 30 having a plurality of types, regardless of the type. The electronic cassette 30 is an example of the "radiography cassette" according to the technique of the present disclosure. In the following, the holders 27A to 27C may be collectively referred to as the holder 27.

A handle 32 is provided at a position protruding above the central portion 15. The handle 32 has a long columnar shape in the width direction of the central portion 15 (see FIG. 3). The handle 32 is gripped by the operator when maneuvering the mobile radiation generator 2.

An irradiation switch 33 is attached to the upper part of the back surface of the central portion 15. The irradiation switch 33 is a switch for the operator to instruct the start of irradiation of radiation. An extension cable (not shown) is connected to the irradiation switch 33, and it can be used by removing it from the central portion 15. The irradiation switch 33 is, for example, a two-step pressing type. The irradiation switch 33 generates a warm-up instruction signal when it is pressed up to the first stage (half-pressed), and generates an irradiation start instruction signal when it is pressed up to the second stage (fully pressed). ..

The strut portion 11 is a prismatic column and is erected along the height direction. The strut portion 11 is arranged at a position above the front wheel 13 and at a central position with respect to the width direction. A tube voltage generator 34 is provided in the support column 11.

The arm portion 12 has a prismatic shape like the strut portion 11. The base end of the arm portion 12 is attached to the support column portion 11. A radiation source 35 is attached to the arm portion 12 at a tip that is a free end opposite to the base end.

The radiation source 35 has a built-in radiation tube 36. Further, an irradiation field limiting device 37 is attached to the radiation source 35. The radiation tube 36 is provided with a filament, a target, a grid electrode, and the like (all not shown). A voltage from the tube voltage generator 34 is applied between the filament, which is the cathode, and the target, which is the anode. The voltage applied between this filament and the target is called the tube voltage. The filament emits thermions corresponding to the applied tube voltage toward the target. The target emits radiation by the collision of thermions from the filament. The grid electrodes are located between the filament and the target. The grid electrode changes the flow rate of thermions from the filament to the target according to the voltage applied from the tube voltage generator 34. The flow rate of thermions from this filament to the target is called the tube current. The tube voltage and tube current are set as irradiation conditions together with the irradiation time. Instead of the tube current and the irradiation time, the tube current irradiation time product, that is, the so-called mAs value may be used as the irradiation condition.

When the irradiation switch 33 is half-pressed and a warm-up instruction signal is generated, the filament is preheated and the rotation of the target is started at the same time. Warm-up is complete when the filament reaches the specified temperature and the target reaches the specified rotation speed. When the irradiation switch 33 is fully pressed to generate an irradiation start instruction signal in the state where this warm-up is completed, the tube voltage is applied from the tube voltage generator 34 and radiation is generated from the radiation tube 36. When the irradiation time set in the irradiation conditions elapses from the start of radiation generation, the application of the tube voltage is stopped and the irradiation of radiation is terminated.

The irradiation field limiting device 37 limits the irradiation field of the radiation generated from the radiation tube 36. In the irradiation field limiting device 37, for example, four shielding plates such as lead that shields radiation are arranged on each side of the quadrangle, in other words, they are assembled in a checkered pattern, and the quadrangle that allows radiation to pass through. The irradiation opening of is formed in the central part. The irradiation field limiting device 37 changes the size of the irradiation opening by changing the position of each shielding plate, thereby changing the irradiation field of radiation.

The control device 20 controls the operation of the radiation source 35 through the tube voltage generator 34. The control device 20 acquires radiation irradiation conditions from the console 21. The control device 20 operates the tube voltage generator 34 under the irradiation conditions acquired from the console 21 to irradiate radiation from the radiation tube 36.

Further, the control device 20 receives the radiographic image RI transmitted from the electronic cassette 30. The control device 20 transfers the radiographic image RI to the console 21.

The console 21 is embedded in the inclined upper surface of the central portion 15. The console 21 is communicably connected to a radiological information system (RIS) via a network such as a LAN (Local Area Network). The console 21 receives a shooting order from RIS. The radiography order describes the specific details of the radiological radiography performed on the patient. Further, the console 21 is communicably connected to the image database server via the network. The image database server is, for example, a PACS (Picture Archiving and Communication System) server, which receives a radiation image RI from the console 21 and stores and manages the received radiation image RI.

The operator inputs a shooting menu according to the shooting order to the console 21. The console 21 transmits the irradiation conditions according to the input shooting menu to the control device 20. Further, the console 21 receives the radiographic image RI transferred from the control device 20, performs image processing on the received radiographic image RI, and displays the radiographic image RI after the image processing on the display 51 (see FIG. 3). ..

As shown in FIG. 2 as an example, the support column portion 11 has a first support column 40 and a second support column 41. The first support column 40 is provided on the upper surface of the main body 10. The first support column 40 can rotate about a vertical axis with respect to the main body portion 10. The second support column 41 can move up and down with respect to the first support column 40 along the height direction.

The arm portion 12 has a fixed arm 42, a first arm 43, and a second arm 44. The fixed arm 42 is bent at a right angle to the second support column 41. The base end of the fixed arm 42 is attached to the second support column 41. A first arm 43 is attached to the tip of the fixed arm 42. That is, the fixed arm 42 connects the second support column 41 and the first arm 43. A radiation source 35 is attached to the tip of the second arm 44. The first arm 43 can slide back and forth along the bent direction of the fixed arm 42, which is orthogonal to the fixed arm 42 in the height direction. Similarly, the second arm 44 can slide back and forth along the bent direction of the fixed arm 42, which is orthogonal to the first arm 43 in the height direction.

The radiation source 35 and the irradiation field limiter 37 can rotate about an axis parallel to the width direction thereof. Further, although not shown, the radiation source 35 and the irradiation field limiting device 37 can rotate about an axis parallel to the front-back direction thereof.

As an example, as shown in FIG. 3, the console 21 is composed of an operation console 50 and a display 51. The console 50 is operated by an operator when setting radiation irradiation conditions and the like. The display 51 displays various screens including an irradiation condition setting screen, a radiation image RI, and the like.

As an example, as shown in FIG. 4, the electronic cassette 30 has a housing 55, a detection panel 56, a battery 57, and the like. The housing 55 has a flat rectangular parallelepiped shape with a rectangular planar shape, and houses the detection panel 56, the battery 57, and the like inside. Most of the front surface of the housing 55 is made of a material that transmits radiation such as carbon. The electronic cassette 30 is placed under the patient lying on the bed with the front surface of the housing 55 facing the radiation source 35.

The detection panel 56 has a configuration in which a plurality of pixels that generate signal charges in response to radiation or visible light converted from radiation by a scintillator are arranged. The battery 57 supplies electric power to each part of the electronic cassette 30. In addition to the detection panel 56 and the battery 57, the housing 55 also includes a control circuit that controls the operation of the detection panel 56, and signal processing that converts the signal charge of the pixel into a pixel value to generate a radiographic image RI. It has a built-in circuit and so on. In addition, a wireless communication unit or the like that performs wireless communication with the control device 20 is also built-in (see FIG. 25).

The electronic cassette 30 has a function of detecting the start and end of irradiation of radiation. When the start of irradiation of radiation is detected, the control circuit that controls the operation of the detection panel 56 causes the detection panel 56 to perform a storage operation of accumulating signal charges in the pixels. When the end of irradiation of radiation is detected, the control circuit causes the detection panel 56 to perform a read operation of reading the accumulated signal charge from the pixel. As a result, the radiation image RI is output from the detection panel 56.

As an example, as shown in FIGS. 5 and 6, the holder 27A is provided with an ultraviolet source 60A. The ultraviolet source 60A has substantially the same length as the width of the holder 27A. A total of nine ultraviolet sources 60A are arranged, four on each of the two side surfaces of the holder 27A facing the front surface and the back surface of the electronic cassette 30, and one on the inner surface of the top plate of the lid 26. The ultraviolet source 60A irradiates the electronic cassette 30 housed in the holder 27A with ultraviolet rays.

Similarly, the holder 27B is provided with an ultraviolet source 60B, and the holder 27C is provided with an ultraviolet source 60C. A total of nine ultraviolet sources 60B are arranged, four on each of the two side surfaces of the holder 27B facing the front surface and the back surface of the electronic cassette 30, and one on the inner surface of the top plate of the lid 26. Further, four ultraviolet sources 60C are arranged on each of the two side surfaces of the holder 27C facing the front surface and the back surface of the electronic cassette 30, and one on the inner surface of the top plate of the lid 26, for a total of nine. The ultraviolet source 60B irradiates the electronic cassette 30 housed in the holder 27B with ultraviolet rays. Further, the ultraviolet source 60C irradiates the electronic cassette 30 housed in the holder 27C with ultraviolet rays.

As the ultraviolet sources 60A to 60C, an LED (Light Emitting Diode), an LD (Laser Diode), or the like can be adopted in addition to a general ultraviolet lamp using a quartz tube such as an excimer lamp. Further, the ultraviolet rays emitted by the ultraviolet sources 60A to 60C have a center wavelength of 200 nm or more and 280 nm or less, for example, 254 nm, and the intensity is constant. In the following, the ultraviolet sources 60A to 60C may be collectively referred to as the ultraviolet source 60.

The holder 27A is provided with a detection sensor 61A. The detection sensor 61A detects whether or not the electronic cassette 30 is housed inside the holder 27A. The detection sensor 61A is a limit switch that turns on when the electronic cassette 30 is housed in the holder 27A and turns off when the electronic cassette 30 is taken out of the holder 27A. Alternatively, the detection sensor 61A is a photo sensor composed of a light emitting unit and a light receiving unit. In this case, when the electronic cassette 30 is housed in the holder 27A, the light from the light projecting unit is blocked, and when the electronic cassette 30 is taken out from the holder 27A, the light from the light emitting unit is received by the light receiving unit. ..

Similarly, the holder 27B is provided with the detection sensor 61B, and the holder 27C is provided with the detection sensor 61C. The detection sensor 61B detects whether or not the electronic cassette 30 is housed inside the holder 27B. Further, the detection sensor 61C detects whether or not the electronic cassette 30 is housed inside the holder 27C. In the following, the detection sensors 61A to 61C may be collectively referred to as the detection sensor 61.

A lid sensor 62 is provided at the engagement portion of the holder portion main body 25 with the lid 26. The lid sensor 62 detects the opening and closing of the lid 26. The lid sensor 62 is a limit switch that turns on when the lid 26 is closed and turns off when the lid 26 is opened. Alternatively, the lid sensor 62 is a photo sensor composed of a light emitting unit and a light receiving unit. In this case, when the lid 26 is closed, the light from the light projecting unit is blocked, and when the lid 26 is opened, the light from the light projecting unit is received by the light receiving unit.

As an example, as shown in FIG. 7, the control device 20 includes a storage 70 and a CPU (Central Processing Unit) 71. The storage 70 is, for example, a hard disk drive or a solid state drive. The operation program 72 and the set time TS are stored in the storage 70. When the operation program 72 is activated, the CPU 71 cooperates with a memory or the like (not shown) to obtain an irradiation condition acquisition unit 75, a radiation source control unit 76, an image acquisition unit 77, an image transfer unit 78, and an ultraviolet source control unit. Functions as 79. The ultraviolet source control unit 79 includes a measurement unit 80.

The irradiation condition acquisition unit 75 acquires the irradiation condition transmitted from the console 21. The irradiation condition acquisition unit 75 outputs the acquired irradiation condition to the radiation source control unit 76.

The radiation source control unit 76 controls the operation of the radiation source 35. The radiation source control unit 76 sets the irradiation conditions from the irradiation condition acquisition unit 75 in the tube voltage generator 34. When the irradiation start instruction signal is input through the irradiation switch 33, the radiation source control unit 76 irradiates radiation from the radiation tube 36 under the set irradiation conditions.

The image acquisition unit 77 receives the radiation image RI transmitted from the electronic cassette 30, and outputs the received radiation image RI to the image transfer unit 78. The image transfer unit 78 transfers the radiographic image RI from the image acquisition unit 77 to the console 21.

The ultraviolet source control unit 79 controls the operation of the ultraviolet source 60 based on the detection signals from the detection sensor 61 and the lid sensor 62. The measuring unit 80 measures the elapsed time from the start of irradiation of the ultraviolet rays of the ultraviolet source 60. More specifically, the measuring unit 80 starts measuring the elapsed time when the ultraviolet source control unit 79 outputs an instruction to start irradiating the ultraviolet source 60 with ultraviolet rays. Then, the measurement of the elapsed time is continued until the ultraviolet source control unit 79 outputs an instruction to stop the irradiation of ultraviolet rays to the ultraviolet source 60. The measuring unit 80 ends the measurement of the elapsed time when the ultraviolet source control unit 79 outputs an instruction to stop the irradiation of the ultraviolet rays to the ultraviolet source 60, and resets the elapsed time to 0.

The console 21 includes a storage 90 and a CPU (Central Processing Unit) 91 in addition to the operation console 50 and the display 51 described above. The storage 90 is, for example, a hard disk drive or a solid state drive. The operation program 94 and the irradiation condition table 95 are stored in the storage 90. When the operation program 94 is activated, the CPU 91 functions as a shooting menu reception unit 100, an irradiation condition setting unit 101, an image processing unit 102, and a display control unit 103 in cooperation with a memory or the like (not shown).

Prior to radiological imaging, the display control unit 103 displays a list of imaging orders from RIS on the display 51. The operator browses the list of shooting orders and confirms the contents. The display control unit 103 displays, together with the shooting order, a plurality of types of shooting menus prepared in advance on the display 51 in a form that can be selectively selected. By operating the console 50, the operator selects and inputs a shooting menu that matches the contents of the shooting order. As a result, the shooting menu is accepted by the shooting menu reception unit 100. The shooting menu reception unit 100 outputs the received shooting menu to the irradiation condition setting unit 101.

The irradiation condition setting unit 101 reads out the irradiation conditions corresponding to the shooting menu from the irradiation condition table 95, and transmits the read irradiation conditions to the control device 20. The irradiation condition table 95 is a table in which irradiation conditions are registered for each shooting menu. The shooting menu is a combination of shooting parts such as the chest and abdomen, shooting postures such as the recumbent position, and shooting orientations such as the front and back. The irradiation conditions can be modified via the console 50 before being transmitted to the control device 20.

The image processing unit 102 performs various image processing on the radiation image RI from the control device 20. The image processing unit 102 performs, for example, offset correction processing, sensitivity correction processing, defect pixel correction processing, and the like as image processing.

The offset correction process is a process of subtracting the offset correction image output in a state where no radiation is applied from the radiation image RI in pixel units. By performing this offset correction processing, the image processing unit 102 removes fixed pattern noise caused by dark charges and the like from the radiation image RI. The sensitivity correction process is a process for correcting variations in the sensitivity of each pixel of the detection panel 56 of the electronic cassette 30, variations in the output characteristics of the circuit that reads out the signal charge, and the like, based on the sensitivity correction data. The defective pixel correction process is a process of linearly interpolating the pixel values of defective pixels with the pixel values of surrounding normal pixels based on the information of defective pixels having abnormal pixel values, which is generated at the time of shipment or periodic inspection. The image processing unit 102 outputs the radiation image RI that has undergone such various image processing to the display control unit 103. The display control unit 103 displays the radiation image RI from the image processing unit 102 on the display 51.

The detection status of the detection sensor 61 and the lid sensor 62 is input to the display control unit 103 from the ultraviolet source control unit 79. Further, the display control unit 103 is input with the elapsed time from the start of the irradiation of ultraviolet rays from the measurement unit 80. The display control unit 103 displays on the display 51 an information notification screen 110 (see FIGS. 13 and 14) regarding the progress of sterilization of the electronic cassette 30 by ultraviolet rays based on the detection status and elapsed time of the detection sensor 61 and the lid sensor 62. do. That is, the display control unit 103 is an example of the "notification control unit" according to the technique of the present disclosure.

The holder 27, the ultraviolet source 60, the ultraviolet source control unit 79, the measurement unit 80, and the display control unit 103 constitute an accommodating device 105 for a cassette for radiography.

As an example, as shown in FIG. 8, the set time TS stored in the storage 70 is input to the ultraviolet source control unit 79. The set time TS is the irradiation time of ultraviolet rays required for sterilizing bacteria and / or viruses. The set time TS varies depending on the intensity of ultraviolet rays, the type of bacteria and / or virus to be sterilized, and the like, but is generally several seconds to several tens of minutes. For example, it has been reported that the new coronavirus (SARS (Severe Acute Respiratory Syndrome) -CoV (Coronavirus) -2) is inactivated by irradiation with ultraviolet rays for several seconds. More specifically, it has been reported that 99.7% of UV rays with a central wavelength of 222 nm and an intensity of 1 W / m ² are inactivated by irradiation for 30 seconds (https://xtech.nikkei.com/atcl/nxt). / news / 18/08672 /). It is also reported that 99.9% of the ultraviolet rays with a central wavelength of 254 nm are inactivated in 10 to 15 seconds (https://robotstart.info/2020/09/10/uvbuster-covid19.html). .. FIG. 8 illustrates a case where 5 minutes is set as the set time TS.

As an example, as shown in FIG. 9, the ultraviolet source control unit 79 detects that the electronic cassette 30 is housed inside the holder 27 by the detection sensor 61 (the detection sensor 61 is turned on), and the lid sensor 62 covers the lid. When it is detected that 26 is closed (the lid sensor 62 is turned on), the ultraviolet source 60 is instructed to irradiate ultraviolet rays.

On the other hand, as shown in FIG. 10 as an example, when the detection sensor 61 detects that the electronic cassette 30 is not housed inside the holder 27 (the detection sensor 61 is turned off), the ultraviolet source control unit 79 emits ultraviolet rays. A signal is output that does not instruct the source 60 to irradiate ultraviolet rays or prohibits the irradiation of ultraviolet rays to the ultraviolet source 60. In this case, even when the lid 26 is closed and the lid sensor 62 is turned on, the ultraviolet source control unit 79 does not instruct the ultraviolet source 60 to irradiate the ultraviolet source 60, or prohibits the ultraviolet source 60 from irradiating the ultraviolet light. Output the signal to be used.

Further, as shown in FIG. 11, as an example, the ultraviolet source control unit 79 reaches a preset set time TS after the elapsed time from the start of irradiation of the ultraviolet rays measured by the measuring unit 80 is reached, and the ultraviolet rays are emitted. When the set time TS has elapsed since the irradiation of the above was started, the ultraviolet source 60 is stopped from being irradiated with the ultraviolet rays.

Further, as shown in FIG. 12, as an example, when the ultraviolet source control unit 79 detects that the lid 26 has been opened by the lid sensor 62 before the set time TS elapses after the irradiation of ultraviolet rays is started. , The ultraviolet source 60 is stopped from irradiating with ultraviolet rays. When it is detected again by the lid sensor 62 that the lid 26 is closed, the ultraviolet source control unit 79 causes the ultraviolet source 60 to resume irradiation with ultraviolet rays.

As an example, as shown in FIG. 13, the information notification screen 110_1 displayed on the display 51 under the control of the display control unit 103 is a display for the holder 27A (denoted as the first holder in FIG. 13, and the same applies to FIG. 14). The display area 111A for the area 111A, the display area 111B for the holder 27B (denoted as the second holder in FIG. 13, the same applies to FIG. 14), and the display area 111C for the holder 27C (denoted as the third holder in FIG. 13, the same applies to FIG. 14). Have. The message 112 is displayed in the display areas 111A to 111C. The message 112 has contents such as the

display areas

111A and 111B that indicate the remaining time until the set time TS is reached after the elapsed time from the start of the irradiation of ultraviolet rays. Further, the message 112 has a content that informs that the electronic cassette 30 is not housed in the holder 27 and that the ultraviolet source 60 does not irradiate the ultraviolet rays, unlike the display area 111C. Further, the message 112 also has a content (see the display area 111C of FIG. 14) for notifying that the set time TS has elapsed from the start of the irradiation of the ultraviolet rays and the sterilization by the ultraviolet rays is completed. In this way, the display control unit 103 controls each of the plurality of holders 27A to 27C to notify information regarding the progress of sterilization of the electronic cassette 30 by ultraviolet rays.

As shown in FIG. 12, when it is detected by the lid sensor 62 that the lid 26 has been opened before the set time TS elapses after the irradiation of ultraviolet rays is started, the display control unit 103 is used as an example. The information notification screen 110_2 shown in FIG. 14 is displayed on the display 51. The information notification screen 110_2 has a warning display area 115 in addition to the display areas 111A to 111C. A warning message 116 is displayed in the warning display area 115. The warning message 116 is a content notifying that the sterilization by ultraviolet rays has not been completed. FIG. 14 illustrates a case where the electronic cassette 30 is housed inside the

holders

27A and 27B and is being irradiated with ultraviolet rays by the ultraviolet source 60. On the information notification screen 110_2, the countdown display of the remaining time is stopped. Here, when the lid sensor 62 detects that the lid 26 has been opened, it is an example of "when the radiography cassette is about to be taken out from the holder" according to the technique of the present disclosure. The "case where the radiography cassette is about to be taken out from the holder" is, in other words, the case where the operator detects the operation of taking out the radiography cassette.

Next, the operation of the above configuration will be described with reference to the flowchart shown in FIG. As shown in FIG. 7, when the operation program 72 is activated, the CPU 71 of the control device 20 controls the irradiation condition acquisition unit 75, the radiation source control unit 76, the image acquisition unit 77, the image transfer unit 78, and the ultraviolet source control. It functions as a unit 79. The ultraviolet source control unit 79 includes a measurement unit 80. When the operation program 94 is activated, the CPU 91 of the console 21 functions as a shooting menu reception unit 100, an irradiation condition setting unit 101, an image processing unit 102, and a display control unit 103.

The procedure for radiography by the mobile radiation generator 2 starts from the radiography preparation work. The shooting preparation work is a work performed by the operator. Specifically, the imaging preparation work is a work of setting irradiation conditions and a work of positioning a patient or the like. After the imaging preparation work is completed, the operator operates the irradiation switch 33 to instruct the start of radiographic imaging.

The operator inputs the shooting menu according to the shooting order from the RIS by operating the console 50 as the work of setting the irradiation conditions. The shooting menu is accepted by the shooting menu reception unit 100. Then, the irradiation conditions corresponding to the shooting menu received by the shooting menu reception unit 100 are read out from the irradiation condition table 95 by the irradiation condition setting unit 101. The irradiation condition is transmitted from the irradiation condition setting unit 101 to the control device 20.

After inputting the imaging menu, the operator inserts the electronic cassette 30 under the patient lying on the bed, or operates the support column 11, the arm portion 12, etc. according to the position of the inserted electronic cassette 30 to generate a radiation source. Positioning is performed by adjusting the position of 35.

In the control device 20, the irradiation condition acquisition unit 75 acquires the irradiation condition from the console 21. The irradiation conditions are output from the irradiation condition acquisition unit 75 to the radiation source control unit 76, and are set in the tube voltage generator 34 by the radiation source control unit 76.

When the irradiation switch 33 instructs the start of radiography, radiation is emitted from the radiation tube 36 toward the patient under the control of the radiation source control unit 76. As a result, the radiographic image RI is output from the electronic cassette 30. The radiation image RI is output from the electronic cassette 30 to the image acquisition unit 77, and further output from the image acquisition unit 77 to the image transfer unit 78. The radiographic image RI is transferred to the console 21 by the image transfer unit 78.

In the console 21, various image processes are applied to the radiation image RI by the image processing unit 102. The radiation image RI subjected to various image processing is output from the image processing unit 102 to the display control unit 103. Then, under the control of the display control unit 103, it is displayed on the display 51 and is used for viewing by the operator.

In the holder 27 of the holder unit 16, it is detected by the detection sensor 61 whether or not the electronic cassette 30 is accommodated. Further, the opening / closing of the lid 26 is detected by the lid sensor 62. The detection status of the detection sensor 61 and the lid sensor 62 is output from the ultraviolet source control unit 79 to the display control unit 103.

As an example, as shown in FIG. 15, when the detection sensor 61 detects that the electronic cassette 30 is housed in the holder 27, and the lid sensor 62 detects that the lid 26 is closed (step ST100 and step). Both are YES in ST110), and as shown in FIG. 9, irradiation of ultraviolet rays by the ultraviolet source 60 is performed under the control of the ultraviolet source control unit 79 (step ST120).

On the other hand, when it is detected by the detection sensor 61 that the electronic cassette 30 is not housed in the holder 27 (NO in step ST100), as shown in FIG. 10, the ultraviolet source 60 does not irradiate the ultraviolet rays. Similarly, when the lid sensor 62 detects that the lid 26 has been opened (NO in step ST110), the ultraviolet source 60 does not irradiate the ultraviolet rays.

The measuring unit 80 measures the elapsed time since the start of ultraviolet irradiation (step ST130). The elapsed time is output from the measurement unit 80 to the display control unit 103. As shown in FIG. 13, under the control of the display control unit 103, the information notification screen 110_1 including the message 112 notifying the remaining time until the elapsed time from the start of the irradiation of ultraviolet rays reaches the set time TS is displayed. It is displayed on the display 51. As a result, the remaining time is notified to the operator (step ST140).

Irradiation of ultraviolet rays by the ultraviolet source 60 is continued until the elapsed time reaches the set time TS (NO in step ST160). When the elapsed time reaches the set time TS and the set time TS has elapsed since the irradiation of ultraviolet rays was started (YES in step ST160), as shown in FIG. 11, the ultraviolet rays are controlled by the ultraviolet source control unit 79. Irradiation of ultraviolet rays by the source 60 is stopped (step ST170).

Further, even when the lid sensor 62 detects that the lid 26 has been opened before the set time TS elapses (YES in step ST150), the ultraviolet rays generated by the ultraviolet source 60 are controlled by the ultraviolet source control unit 79. Irradiation is stopped (step ST170). In this case (YES in step ST180), as shown in FIG. 14, under the control of the display control unit 103, the information notification screen 110_2 including the warning message 116 notifying that the sterilization by ultraviolet rays is not completed is displayed on the display 51. Is displayed in. As a result, the operator is notified that the sterilization by ultraviolet rays has not been completed (step ST190).

As described above, the accommodating device 105 of the cassette for radiography includes a holder 27 accommodating the electronic cassette 30, an ultraviolet source 60 for irradiating the electronic cassette 30 housed in the holder 27 with ultraviolet rays, and irradiation of ultraviolet rays. When the preset time TS has elapsed since the start of It is provided with a display control unit 103 for performing. Therefore, it is possible to prevent the electronic cassette 30 from being used before the sterilization by ultraviolet rays is completed.

The display control unit 103 controls the information notification screen 110 to notify the remaining time from the start of irradiation of ultraviolet rays until the elapsed time reaches the set time as information. Therefore, the operator can grasp at a glance how long the sterilization by ultraviolet rays should be completed. The operator can reliably use the electronic cassette 30 which has been sterilized by ultraviolet rays and has zero remaining time. It also serves as a deterrent to the operator taking out the electronic cassette 30, that is, the electronic cassette 30, which has not been sterilized by ultraviolet rays, from the holder 27 and using it with the remaining time not being zero.

When the display control unit 103 detects that the lid 26 has been opened by the lid sensor 62 before the set time TS elapses after the start of ultraviolet irradiation, that is, the electronic cassette 30 is taken out from the holder 27. When this happens, control is performed to notify as information a warning that sterilization by ultraviolet rays has not been completed through the information notification screen 110. Therefore, it is possible to further strongly prevent the operator from taking out the electronic cassette 30 that has not been sterilized by ultraviolet rays from the holder 27 and using it.

There are a plurality of holders 27, and the display control unit 103 controls each of the plurality of holders 27 to notify information regarding the progress of sterilization of the electronic cassette 30 by ultraviolet rays. Therefore, the operator can individually and specifically grasp the information for each of the plurality of holders 27.

The mobile radiation generator 2 is provided with a main body 10 having a radiation source 35 for irradiating radiation and having wheels 13 for traveling, and a holder 27 is provided on the main body 10. In radiography using the mobile radiation generator 2, there are relatively many opportunities for the electronic cassette 30 to come into contact with the patient, and therefore there is a very high possibility that the electronic cassette 30 will be contaminated. Therefore, it is possible to greatly suppress the use of the electronic cassette 30 without completing the sterilization by ultraviolet rays.

In FIG. 14, when it is detected by the lid sensor 62 that the lid 26 has been opened before the set time TS elapses after the irradiation of ultraviolet rays is started, it is reported that the sterilization by ultraviolet rays is not completed. Although an example of displaying the information notification screen 110_2 including the warning message 116 to be displayed on the display 51 is shown, the present invention is not limited to this. As an example, as shown in FIG. 16, when the detection sensor 61 detects that the electronic cassette 30 has been taken out from the holder 27 before the set time TS elapses after the irradiation of ultraviolet rays is started, it is sterilized by ultraviolet rays. The information notification screen 110_2 including the warning message 116 notifying that the above is not completed may be displayed on the display 51. FIG. 16 illustrates a case where the electronic cassette 30 housed inside the holder 27B (second holder) is taken out from the holder 27B before the sterilization by ultraviolet rays is completed. Also in this aspect, it is possible to prevent the operator from using the electronic cassette 30 that has not been sterilized by ultraviolet rays.

[Second Embodiment]
In the second embodiment shown in FIGS. 17 to 22, it is prohibited to take out the electronic cassette 120 from the holder 27 before the set time TS elapses after the irradiation of ultraviolet rays is started.

As an example, as shown in FIG. 17, the electronic cassette 120 of the second embodiment is provided with recesses 121 on both side surfaces on the long side.

As an example, as shown in FIG. 18, the holder portion 125 of the second embodiment has a holder portion main body 126 and a lid 127 that can be opened and closed with respect to the holder portion main body 126, similarly to the holder portion 16 of the first embodiment. And have. The holder main body 126 is provided with

holders

128A, 128B, and 128C (only the holder 128A is shown in FIG. 18, and the

holders

128B and 128C are shown in FIG. 19). In the following, the holders 128A to 128C may be collectively referred to as the holder 128.

The holder 128A is provided with an ultraviolet source 60A. Similar to the first embodiment, four ultraviolet sources 60A are arranged on each of the two side surfaces of the holder 128A facing the front surface and the back surface of the electronic cassette 120, and one on the inner surface of the top plate of the lid 127, for a total of nine. Has been done. The ultraviolet source 60A irradiates the electronic cassette 120 housed in the holder 128A with ultraviolet rays. The holder 128B is provided with an ultraviolet source 60B, and the holder 128C is provided with an ultraviolet source 60C (see FIG. 19).

The holder 128A has a lock mechanism 129A. The lock mechanism 129A includes a regulation bar 130 and a solenoid 131. The regulation bar 130 is reciprocated by the solenoid 131 between the locked position and the unlocked position as indicated by the arrow. The lock position is a position where the electronic cassette 120 is fitted into the recess 121 of the electronic cassette 120 housed in the holder 128A and the removal of the electronic cassette 120 from the holder 128A is prohibited. The unlock position is a position that allows the electronic cassette 120 to be taken out from the holder 128A, away from the recess 121. The holder 128B is provided with a lock mechanism 129B having the same configuration as the lock mechanism 129A, and the holder 128C is also provided with a lock mechanism 129C having the same configuration as the lock mechanism 129A (see FIG. 19). .. In the following, the lock mechanisms 129A to 129C may be collectively referred to as the lock mechanism 129.

Further, the holder portion main body 126 is provided with a lock forced release switch 132A for the holder 128A. The lock forced release switch 132A is operated by the operator when the lock mechanism 129A forcibly releases the prohibition of taking out the electronic cassette 120 from the holder 128A. The holder main body 126 is also provided with a lock forced release switch 132B for the holder 128B and a lock forced release switch 132C for the holder 128C (see FIG. 19). In the following, the lock forced release switches 132A to 132C may be collectively referred to as the lock forced release switch 132.

Similar to the first embodiment, the holder 128 is provided with a detection sensor 61. Further, as in the first embodiment, the lid sensor 62 is provided at the engaging portion of the holder portion main body 126 with the lid 127.

As an example, as shown in FIG. 19, the CPU of the control device of the second embodiment is attached to each unit 75 to 80 of the first embodiment (in FIG. 19, the parts other than the ultraviolet source control unit 79 and the measurement unit 80 are not shown). In addition, it functions as a take-out prohibition control unit 140. The take-out prohibition control unit 140 controls the operation of the lock mechanism 129. The take-out prohibition control unit 140, the holder 128, the ultraviolet source 60, the ultraviolet source control unit 79, and the measurement unit 80 constitute an accommodating device 145 for the cassette for radiography.

As an example, as shown in FIG. 20, the take-out prohibition control unit 140 operates the lock mechanism 129 under the control of the ultraviolet source control unit 79 during the set time TS in which ultraviolet rays are emitted from the ultraviolet source 60. , The removal of the electronic cassette 120 from the holder 128 is prohibited. That is, the take-out prohibition control unit 140 controls to prohibit the electronic cassette 120 from being taken out from the holder 128 before the set time TS elapses after the irradiation of ultraviolet rays is started. The take-out prohibition control unit 140 controls to prohibit the electronic cassette 120 from being taken out for each of the plurality of holders 128A to 128C.

As an example, as shown in FIG. 21, the take-out prohibition control unit 140 is locked when the lid 127 is opened and the lock forced release switch 132 is operated before the set time TS elapses after the irradiation of ultraviolet rays is started. The mechanism 129 is operated to release the prohibition of taking out the electronic cassette 120 from the holder 128. When the lid 127 is closed without operating the lock forced release switch 132 and the lid sensor 62 detects again that the lid 127 is closed, the ultraviolet source control unit 79 irradiates the ultraviolet source 60 with ultraviolet rays. To resume. Further, the take-out prohibition control unit 140 continues the control for prohibiting the electronic cassette 120 from being taken out from the holder 128.

FIG. 22 is a flowchart showing a processing procedure of the accommodating device 145 of the radiography cassette according to the second embodiment. The processing procedure common to the first embodiment will be described while being appropriately omitted.

When the detection sensor 61 detects that the electronic cassette 120 is housed in the holder 128, and the lid sensor 62 detects that the lid 127 is closed (YES in both steps ST100 and ST110), FIG. As shown, the lock mechanism 129 is operated by the take-out prohibition control unit 140, and the take-out of the electronic cassette 120 from the holder 128 is prohibited (step ST200). Then, under the control of the ultraviolet source control unit 79, the ultraviolet source 60 irradiates the ultraviolet rays (step ST120), and the elapsed time is measured (step ST130). The control of prohibition of removal of the electronic cassette 120 by the removal prohibition control unit 140 is continued until the set time TS has elapsed from the start of irradiation with ultraviolet rays (NO in step ST160).

When the set time TS has elapsed since the irradiation of ultraviolet rays was started (YES in step ST160), the irradiation of ultraviolet rays by the ultraviolet source 60 is stopped by the ultraviolet source control unit 79 (step ST170). Then, the lock mechanism 129 is operated by the take-out prohibition control unit 140, and the take-out prohibition of the electronic cassette 120 is released (NO in step ST180, step ST220).

When the lid 127 is opened (YES in step ST150), the irradiation of ultraviolet rays is stopped (step ST170), and the lock forced release switch 132 is operated after the irradiation of ultraviolet rays is started and before the set time TS elapses. (YES in step ST180 and step ST210), as shown in FIG. 21, the lock mechanism 129 is operated by the take-out prohibition control unit 140, and the take-out prohibition of the electronic cassette 120 is released (step ST220).

As described above, in the second embodiment, the take-out prohibition control unit 140 controls to prohibit the electronic cassette 120 from being taken out from the holder 128 before the set time TS elapses after the irradiation of ultraviolet rays is started. .. Therefore, as in the first embodiment, it is possible to prevent the electronic cassette 120 from being used before the sterilization by ultraviolet rays is completed.

The take-out prohibition control unit 140 cancels the take-out prohibition of the electronic cassette 120 from the holder 128 in response to an operator's instruction through the lock forced release switch 132. Therefore, it is possible to deal with a case where radiography is to be performed with priority over sterilization by ultraviolet rays due to an emergency or the like.

It should be noted that the first embodiment and the second embodiment may be combined and implemented. Specifically, the display control unit 103 controls to notify information regarding the progress of sterilization of the electronic cassette 30 by ultraviolet rays, and the take-out prohibition control unit 140 controls the holder 128 before the set time TS elapses. Control may be performed to prohibit the electronic cassette 120 from being taken out.

The lock forced release switch 132 is not limited to a physical switch. The lock forced release switch 132 may be a GUI (Graphical User Interface) displayed on the display 51.

Instead of the lock mechanism 129 that prohibits the removal of the electronic cassette 120 from the holder 128, a lock mechanism that prohibits the lid 127 from being opened may be provided.

[Third Embodiment]
As an example, as shown in FIG. 23, the electronic cassette 30 can be detachably attached to the grid 150 on the front surface of the housing 55. The grid 150 removes scattered radiation generated as radiation passes through the patient. The grid 150 is composed of a rectangular plate-shaped grid main body 151 and a holding frame 152 for holding the grid main body 151. The grid body 151 has a size that covers substantially the entire front surface of the housing 55 when the grid 150 is attached to the front surface of the housing 55. The holding frame 152 is made of a conductive material having electromagnetic wave shielding properties such as aluminum or stainless steel, and has a size slightly larger than the front surface of the housing 55. The holding frame 152 is provided with a mechanism for fixing the grid 150 to the front surface of the housing 55 to prevent the grid 150 from falling off.

As an example, as shown in FIG. 24, the holder portion 155 of the third embodiment has a holder portion main body 156 and a lid 157 that can be opened and closed with respect to the holder portion main body 156, similarly to the holder portion 16 of the first embodiment. And have. The holder portion main body 156 is provided with

holders

158A, 158B, and 158C. Holders 158A to 158C can accommodate the electronic cassette 30 with the grid 150 attached. Since the other configurations of the holder portion 155 are the same as those of the holder portion 16 of the first embodiment, the description thereof will be omitted.

As described above, in the third embodiment, the holders 158A to 158C can accommodate the electronic cassette 30 in a state where the grid 150 for removing scattered rays is attached. Therefore, not only the electronic cassette 30 but also the grid 150 can be sterilized by ultraviolet rays.

A holder dedicated to the grid 150 may be provided, and the grid 150 may be sterilized by ultraviolet rays using the dedicated holder. The holder dedicated to the grid 150 may be optionally retrofitted. However, in this case, it is necessary to remove the grid 150 from the electronic cassette 30 and attach the grid 150 to the electronic cassette 30 again after sterilization in order to perform sterilization separately, which is troublesome. In addition, the cost is high because a dedicated holder is provided. Therefore, it is preferable to have a configuration that can accommodate the electronic cassette 30 with the grid 150 attached, such as the holders 158A to 158C.

The second embodiment and the third embodiment may be combined and implemented.

[Fourth Embodiment]
In the fourth embodiment shown in FIG. 25, the irradiation time of ultraviolet rays is stored.

As shown in FIG. 25 as an example, the electronic cassette 160 of the fourth embodiment has a wireless communication unit 162 that wirelessly transmits the identification information 161. The identification information 161 is an ID (Identification Data) assigned to uniquely identify the electronic cassette 160, such as “DR0001”. The identification information 161 is stored in a non-volatile memory (not shown) in the electronic cassette 160. The wireless communication unit 162 wirelessly transmits the identification information 161 using well-known wireless communication techniques such as Wi-Fi (registered trademark), Bluetooth (registered trademark), and infrared communication.

The

holders

163A, 163B, and 163C of the fourth embodiment have the same basic configurations as the holders 27A to 27C of the first embodiment, except that they have

wireless communication units

164A, 164B, and 164C. The wireless communication units 164A to 164C receive the identification information 161 transmitted from the wireless communication unit 162 of the electronic cassette 160 housed in the holders 163A to 163C. The wireless communication units 164A to 164C output the received identification information 161 to the ultraviolet source control unit 170. FIG. 25 illustrates how the electronic cassette 160 is housed in the holder 163A and the identification information 161 is received by the wireless communication unit 164A of the holder 163A.

The measurement unit 171 of the ultraviolet source control unit 170 stores the irradiation start date and time when the ultraviolet source 60 starts irradiation with ultraviolet rays and the irradiation end date and time when the ultraviolet source 60 ends irradiation with ultraviolet rays. Then, the irradiation time of ultraviolet rays is obtained from the irradiation start date and time and the irradiation end date and time.

The CPU of the control device of the fourth embodiment functions as a read / write (hereinafter, abbreviated as RW (Read Write)) control unit 172. The ultraviolet source control unit 170 outputs irradiation time information 173 including irradiation start date / time, irradiation end date / time, and irradiation time, and identification information 161 to the RW control unit 172.

The storage 70 stores the irradiation time information history 174 for each of the plurality of electronic cassettes 160. The RW control unit 172 registers the irradiation time information 173 from the ultraviolet source control unit 170 in the irradiation time information history 174 according to the identification information 161. That is, the RW control unit 172 stores the ultraviolet irradiation time in the storage 70. That is, the storage 70 is an example of the "storage unit" according to the technique of the present disclosure, and the RW control unit 172 is an example of the "memory control unit" according to the technique of the present disclosure.

In FIG. 25, the electronic cassette 160 having the identification information 161 of "DR0001" is housed in the holder 163A, the irradiation start date and time of ultraviolet rays is "2020.10.19 15:11", and the irradiation end date and time is "2020.10.19". The irradiation time information 173 of "15:16" and the irradiation time of "5 minutes" shows an example in which the identification information 161 is registered in the irradiation time information history 174 of "DR0001".

As described above, in the fourth embodiment, the RW control unit 172 that stores the irradiation time of ultraviolet rays in the storage 70 is provided. Therefore, the irradiation time of ultraviolet rays can be controlled.

Further, the RW control unit 172 stores the irradiation time for each of the plurality of electronic cassettes 160. Therefore, the maintenance of the electronic cassette 160 can be appropriately performed. More specifically, in the electronic cassette 160, a resin sheet such as vinyl chloride or polycarbonate is laminated on the housing surface, or resin parts are arranged on a lid or the like covering the battery 57 in order to prevent scratches or the like. However, there is a concern that such resin products will be deteriorated by irradiation with ultraviolet rays. Therefore, if the irradiation time is stored and managed for each of a plurality of electronic cassettes 160, the degree of deterioration of the resin product can be managed for each electronic cassette 160, and the operator can appropriately set the replacement time of the resin product. Can be informed. When the resin product is replaced, the irradiation time information history 174 is reset.

In addition, instead of the mode in which the wireless communication units 164A to 164C are provided in the holders 163A to 163C, the following mode may be adopted. That is, the control device 20 or the console 21 is provided with a wireless communication unit that wirelessly communicates the identification information 161 with the wireless communication unit 162 of the electronic cassette 160. Then, by outputting the identification information 161 received by the wireless communication unit to the ultraviolet source control unit 170, the ultraviolet source control unit 170 is made to recognize the identification information 161.

An RFID (Radio Frequency Identifier) tag storing the identification information 161 may be attached to the electronic cassette 160, and the identification information 161 may be read by an RFID reader provided in the holder. Further, a barcode representing the identification information 161 may be attached to the electronic cassette 160, and the barcode may be read by a barcode reader provided in the holder.

The irradiation time may be stored for each ultraviolet source 60A to 60C. By doing so, the maintenance of the ultraviolet sources 60A to 60C can be appropriately performed.

[Fifth Embodiment]
In the fifth embodiment shown in FIGS. 26 and 27, the normal sterilization mode NM and the rapid sterilization mode RM are switched.

As shown in FIGS. 26 and 27 as an example, in the fifth embodiment, a mode changeover switch 180 for operating the operator to switch between the normal sterilization mode NM and the rapid sterilization mode RM is provided. The mode changeover switch 180 is provided, for example, next to the holder of the holder portion main body, as in the lock forced release switch 132 of the second embodiment. The mode changeover switch 180 is connected to the ultraviolet source control unit 181. The mode changeover switch 180 outputs a mode changeover signal emitted by the operation to the ultraviolet source control unit 181.

As shown in FIG. 26, when the normal sterilization mode NM is selected by the mode changeover switch 180, the ultraviolet source control unit 181 sets the sterilization mode of the ultraviolet source 60 as the normal sterilization mode NM. The normal sterilization mode NM is a mode in which ultraviolet rays having a center wavelength of 222 nm are irradiated to the ultraviolet source 60 at an intensity of 10 W / m ² for 5 minutes with a set time of TS.

On the other hand, as shown in FIG. 27, when the rapid sterilization mode RM is selected by the mode changeover switch 180, the ultraviolet source control unit 181 sets the sterilization mode of the ultraviolet source 60 as the rapid sterilization mode RM. The rapid sterilization mode RM is a mode in which ultraviolet rays having a center wavelength of 254 nm are irradiated to the ultraviolet source 60 at an intensity of 20 W / m ² for 2 minutes for a set time of TS. In this case, as the ultraviolet source 60, two units are prepared: an ultraviolet source 60 that emits ultraviolet rays having a center wavelength of 254 nm and an ultraviolet source 60 that emits ultraviolet rays having a center wavelength of 222 nm. When the normal sterilization mode NM is selected, the ultraviolet source control unit 181 operates the ultraviolet source 60 that emits ultraviolet rays having a center wavelength of 222 nm to emit ultraviolet rays having a center wavelength of 222 nm. When the rapid sterilization mode RM is selected, the ultraviolet source control unit 181 operates an ultraviolet source 60 that emits ultraviolet rays having a center wavelength of 254 nm to emit ultraviolet rays having a center wavelength of 254 nm. Alternatively, the same control may be performed using one ultraviolet source 60 that can switch between ultraviolet rays having a center wavelength of 254 nm and ultraviolet rays having a center wavelength of 222 nm. The intensity of ultraviolet rays is changed by increasing or decreasing the voltage applied to the ultraviolet source 60 and / or the applied current.

The bactericidal ability of ultraviolet rays increases as the intensity of ultraviolet rays increases. Further, ultraviolet rays having a central wavelength of 254 nm have a higher bactericidal ability than ultraviolet rays having a central wavelength of 222 nm. Therefore, the rapid sterilization mode RM that irradiates ultraviolet rays having a center wavelength of 254 nm at an intensity of 20 W / m ² has a set time longer than that of the normal sterilization mode NM that irradiates ultraviolet rays having a center wavelength of 222 nm at an intensity of 10 W / m ² . The TS can be short.

As described above, in the fifth embodiment, the ultraviolet source control unit 181 changes the sterilization ability of ultraviolet rays according to the instruction of the operator through the mode changeover switch 180, so that the normal sterilization mode in which the set time TS is relatively long is relatively long. The NM and the rapid sterilization mode RM having a relatively short set time TS are switched. More specifically, the ultraviolet source control unit 181 changes the sterilizing ability of ultraviolet rays by changing the intensity and wavelength of ultraviolet rays. Therefore, if there are few patients and it takes enough time to sterilize with UV light, the normal sterilization mode NM is selected, and if there are many patients and it does not take much time to sterilize with UV light, sterilization with UV light is completed faster. Therefore, it is possible to take measures such as selecting the rapid sterilization mode RM.

In the case of the normal sterilization mode NM, for example, the green LED may be turned on, and in the case of the rapid sterilization mode RM, for example, the red LED may be turned on.

Although an example of changing both the intensity and wavelength of ultraviolet rays has been shown, at least one of the intensity and wavelength of ultraviolet rays may be changed. Further, like the lock forced release switch 132, the mode changeover switch 180 is not limited to a physical switch, and may be a GUI displayed on the display 51.

[Sixth Embodiment]
In each of the above embodiments, a mobile radiation generator is exemplified as a radiation diagnostic device, but the technique of the present disclosure is not limited to this. As an example, the radiation diagnostic apparatus 200 shown in FIG. 28 may be used.

In FIG. 28, the radiation diagnostic apparatus 200 includes a radiation source 201, a control device 202, a console 203, a tube voltage generator 204, a standing imaging table 205S for photographing a patient in a standing position, and a patient in a lying position. It is equipped with a lying position shooting table 205L or the like for shooting. The radiation source 201, the control device 202, the tube voltage generator 204, the standing position photographing table 205S, and the lying position photographing table 205L are installed in the radiation photographing room. The console 203 is installed in a control room next to the radiography room. The radiation source 201 is also used in the standing position photographing table 205S and the lying position photographing table 205L. In the following, the standing shooting table 205S and the lying position shooting table 205L may be collectively referred to as a shooting table 205.

The radiation source 201 has a built-in radiation tube 206. Further, the radiation field limiting device 207 is attached to the radiation source 201.

The radiation source 201 is suspended from the ceiling of the radiography room by a support column 208. The stanchion 208 is attached to a rail running around the ceiling via wheels. The columns 208, and thus the radiation source 201, are horizontally movable in the radiography chamber by rails and wheels. Further, the support column 208 can be expanded and contracted in the height direction, whereby the radiation source 201 can be moved in the height direction. Further, the radiation source 201 is rotatable with respect to the support column 208 with an axis orthogonal to the paper surface as a rotation axis.

The standing shooting table 205S has a stand 210, a connection portion 211, a standing holder 212S, and the like. The stand 210 is composed of a pedestal 213 installed on the floor of the radiography room and a support column 214 extending in the height direction from the pedestal 213. The connection portion 211 connects the standing holder 212S to the support column 214. The connection portion 211 and the standing holder 212S can be moved in the height direction with respect to the support column 214, and the height can be adjusted according to the height of the patient or the imaging site.

The standing holder 212S has a box shape and houses the electronic cassette 30 inside. The standing holder 212S is mostly made of a conductive material having electromagnetic wave shielding properties such as aluminum and stainless steel. Further, the standing holder 212S is formed of a material such as carbon whose front surface facing the radiation source 201 allows radiation to pass through. The standing holder 212S is an example of a "holder" according to the technique of the present disclosure.

The recumbent position imaging table 205L has a pedestal 215 installed on the floor of the radiography room, a connection portion 216, a top plate 217, a recumbent position holder 212L, and the like. The connection portion 216 connects the top plate 217 to the pedestal 215. The pedestal 215 is an elevating type, whereby the height of the top plate 217 and the recumbent holder 212L can be adjusted. The top plate 217 has a rectangular plate shape having a length and width that allows the patient to lie on its back, and is made of a material that transmits radiation such as carbon.

The lying position holder 212L is arranged in the space between the pedestal 215 formed by the connecting portion 216 and the top plate 217. The recumbent holder 212L has a box shape whose upper portion is covered with a top plate 217, and houses the electronic cassette 30 inside. The recumbent holder 212L is made of a conductive material having electromagnetic wave shielding properties such as aluminum and stainless steel. The recumbent position holder 212L can be slidably moved in the direction along the long side direction of the top plate 217 by a slide mechanism (not shown). The standing holder 212L is an example of the “holder” according to the technique of the present disclosure, like the standing holder 212S. In the following, the standing holder 212S and the lying holder 212L may be collectively referred to as a holder 212.

As shown in FIG. 29 as an example, the standing tray 220S is arranged in the standing holder 212S so that it can be inserted and pulled out. In the standing holder 212S, a rail for guiding the standing tray 220S, a standing lock mechanism 221S for locking the standing tray 220S in the inserted state, and the like are provided. FIG. 29 shows a state in which the standing lock mechanism 221S is unlocked and the standing tray 220S is pulled out from the standing holder 212S.

An electronic cassette 30 is detachably arranged on the standing tray 220S. The standing tray 220S is provided with a holding mechanism for sandwiching and holding the electronic cassette 30 in the vertical direction. Further, a standing ultraviolet source 60S that emits ultraviolet rays for sterilization is attached to the side portion of the standing tray 220S. The standing ultraviolet source 60S irradiates the electronic cassette 30 mounted on the standing tray 220S with ultraviolet rays. The standing ultraviolet source 60S is an example of the "ultraviolet source" according to the technique of the present disclosure.

The standing tray 220S is provided with a standing attachment / detachment sensor 222S. The standing attachment / detachment sensor 222S detects whether or not the electronic cassette 30 is mounted on the standing tray 220S. The standing attachment / detachment sensor 222S is a limit switch that turns on when the electronic cassette 30 is attached to the standing tray 220S and turns off when the electronic cassette 30 is removed from the standing tray 220S. Alternatively, the standing attachment / detachment sensor 222S is a photo sensor composed of a light projecting unit and a light receiving unit. In this case, when the electronic cassette 30 is mounted on the standing tray 220S, the light from the light projecting section is blocked, and when the electronic cassette 30 is removed from the standing tray 220S, the light from the light projecting section is emitted. Light is received by the light receiving unit.

A standing insertion / removal sensor 223S is provided in the standing holder 212S. The standing insertion / removal sensor 223S detects whether or not the standing tray 220S has been inserted into the standing holder 212S. The upright insertion / removal sensor 223S is a limit switch that turns on when the standing tray 220S is inserted into the standing holder 212S and turns off when the standing tray 220S is pulled out from the standing holder 212S. Is. Alternatively, the standing insertion / removal sensor 223S is a photo sensor composed of a light projecting unit and a light receiving unit. In this case, the light from the light projecting unit is blocked when the standing tray 220S is inserted into the standing holder 212S, and the light projecting unit is pulled out from the standing holder 212S when the standing tray 220S is pulled out from the standing holder 212S. The light from is received by the light receiving unit.

A handle 224 is provided on the side surface of the standing tray 220S. The handle 224 is gripped by the operator when the standing tray 220S is inserted into the standing holder 212S and when it is pulled out from the standing holder 212S. When the handle 224 is gripped in the inserted state, the standing tray 220S is unlocked by the standing lock mechanism 221S.

As an example, as shown in FIG. 30, a recumbent tray 220L is arranged in the recumbent holder 212L so that it can be inserted and pulled out. Inside the recumbent holder 212L, a rail for guiding the recumbent tray 220L, a recumbent lock mechanism 221L for locking the recumbent tray 220L in the inserted state, and the like are provided. FIG. 30 shows a state in which the decubitus lock mechanism 221L is unlocked and the decubitus tray 220L is pulled out from the decubitus holder 212L. In the following, the standing tray 220S and the lying tray 220L may be collectively referred to as a tray 220.

An electronic cassette 30 is detachably arranged on the lying tray 220L. The recumbent tray 220L is provided with a holding mechanism for sandwiching and holding the electronic cassette 30 in the left-right direction. Further, a lying position ultraviolet source 60L that emits sterilizing ultraviolet rays is attached to the side portion of the lying position tray 220L. The decubitus ultraviolet source 60L irradiates the electronic cassette 30 mounted on the decubitus tray 220L with ultraviolet rays. The lying position ultraviolet source 60L is an example of the "ultraviolet source" according to the technique of the present disclosure, like the standing position ultraviolet source 60S. In the following, the standing ultraviolet source 60S and the lying ultraviolet source 60L may be collectively referred to as an ultraviolet source 60.

The lying position tray 220L is provided with a lying position attachment / detachment sensor 222L. The recumbent attachment / detachment sensor 222L detects whether or not the electronic cassette 30 is mounted on the recumbent tray 220L. The recumbent attachment / detachment sensor 222L is turned on when the electronic cassette 30 is attached to the recumbent tray 220L and the electronic cassette 30 is removed from the recumbent tray 220L, similarly to the standing attachment / detachment sensor 222S. It is a limit switch that turns off to. Alternatively, the recumbent attachment / detachment sensor 222L is a photo sensor composed of a light emitting unit and a light receiving unit. In this case, when the electronic cassette 30 is mounted on the recumbent tray 220L, the light from the light projecting section is blocked, and when the electronic cassette 30 is removed from the recumbent tray 220L, the light from the light projecting section is emitted. Light is received by the light receiving unit. In the following, the standing attachment / detachment sensor 222S and the recumbent attachment / detachment sensor 222L may be collectively referred to as the attachment / detachment sensor 222.

A recumbent position insertion / removal sensor 223L is provided in the recumbent position holder 212L. The recumbent insertion / removal sensor 223L detects whether or not the recumbent tray 220L has been inserted into the recumbent holder 212L. The recumbent insertion / removal sensor 223L is turned on when the recumbent tray 220L is inserted into the recumbent holder 212L, and the recumbent tray 220L is the recumbent holder, similarly to the standing insertion / removal sensor 223S. It is a limit switch that turns off when it is pulled out from 212L. Alternatively, the recumbent insertion / removal sensor 223L is a photo sensor composed of a light emitting unit and a light receiving unit. In this case, when the recumbent tray 220L is inserted into the recumbent holder 212L, the light from the light projecting section is blocked, and when the recumbent tray 220L is pulled out from the recumbent holder 212L, the light projecting section is used. The light from is received by the light receiving unit. In the following, the standing position insertion / removal sensor 223S and the lying position insertion / removal sensor 223L may be collectively referred to as the insertion / removal sensor 223.

A handle 225 is provided on the side surface of the lying tray 220L. The handle 225 is gripped by the operator when the recumbent tray 220L is inserted into the recumbent holder 212L and when it is pulled out from the recumbent holder 212L. When the handle 225 is gripped in the inserted state, the recumbent tray 220L is unlocked by the recumbent lock mechanism 221L.

As an example, as shown in FIG. 31, in the ultraviolet source control unit of the sixth embodiment, the electronic cassette 30 is housed inside the holder 212 as in the ultraviolet source control unit 79 of the first embodiment. If detected, the ultraviolet source 60 is instructed to irradiate ultraviolet rays. The case where it is detected that the electronic cassette 30 is housed inside the holder 212 is the following case. That is, the attachment / detachment sensor 222 detects that the electronic cassette 30 is attached to the tray 220 (the attachment / detachment sensor 222 is ON), and the insertion / removal sensor 223 detects that the tray 220 is inserted into the holder 212 (insertion / removal sensor). This is the case when 223 is turned on).

Further, the ultraviolet source control unit stops the irradiation of ultraviolet rays on the ultraviolet source 60 when the set time TS has elapsed since the irradiation of ultraviolet rays was started. While the ultraviolet rays are being irradiated in this way, the display control unit of the sixth embodiment notifies as information the remaining time until the elapsed time reaches the set time, similarly to the display control unit 103 of the first embodiment. Take control.

As an example, as shown in FIG. 32, the ultraviolet source control unit detects that the tray 220 is pulled out from the holder 212 by the insertion / removal sensor 223 before the set time TS elapses after the irradiation of ultraviolet rays is started. If so, the ultraviolet source 60 is stopped from irradiating with ultraviolet rays. In addition, the display control unit controls to notify as information a warning that sterilization by ultraviolet rays has not been completed. When it is detected again by the insertion / removal sensor 223 that the tray 220 has been inserted into the holder 212, the ultraviolet source control unit causes the ultraviolet source 60 to resume irradiation with ultraviolet rays. Here, when it is detected by the insertion / removal sensor 223 that the tray 220 is pulled out from the holder 212, it is an example of "when the radiography cassette is about to be taken out from the holder" according to the technique of the present disclosure. ..

As described above, in the sixth embodiment, the radiation diagnostic apparatus 200 includes a standing image pickup table 205S for photographing the patient in a standing position and a lying position photographing table 205L for photographing the patient in a lying position. .. The standing position photographing table 205S is provided with a standing position holder 212S, and the standing position photographing table 205L is provided with a lying position holder 212L. Even in the radiation diagnostic apparatus 200 provided with the standing image pickup table 205S and the recumbent position image pickup table 205L, the electronic cassette 30 may be used in a state where the electronic cassette 30 is taken out from the holder 212 and held by the patient, and the electronic cassette 30 may be contaminated. be. Therefore, it is possible to suppress the use of the electronic cassette 30 without completing the sterilization by ultraviolet rays.

It is sufficient that at least one of the standing shooting table 205S and the lying position shooting table 205L is provided. Further, instead of or in addition to the first embodiment, the second embodiment and the sixth embodiment may be combined and implemented. Specifically, the operation of the standing lock mechanism 221S and the lying lock mechanism 221L is controlled by the take-out prohibition control unit, and the tray 220 is set before the set time TS elapses after the irradiation of ultraviolet rays is started. Control may be performed to prohibit the holder 212 from being pulled out.

[7th Embodiment]
As an accommodating device for the cassette for radiography, the cradle 250 shown in FIG. 33 may be used as an example.

In FIG. 33, the cradle 250 has a cradle body 251 and a lid 252 that can be opened and closed with respect to the cradle body 251. The cradle body 251 is provided with

holders

253A, 253B, and 253C. Each of the holders 253A to 253C accommodates one electronic cassette 30. In the following, the holders 253A to 253C may be collectively referred to as the holder 253.

The holder 253A is provided with an ultraviolet source 60A. The ultraviolet source 60A has the same length as the width of the holder 253A. A total of seven ultraviolet sources 60A are arranged, three on each of the two side surfaces of the holder 253A facing the front surface and the back surface of the electronic cassette 30, and one on the inner surface of the top plate of the lid 252. The ultraviolet source 60A irradiates the electronic cassette 30 housed in the holder 253A with ultraviolet rays.

Similarly, the holder 253B is provided with an ultraviolet source 60B, and the holder 253C is provided with an ultraviolet source 60C. A total of seven ultraviolet sources 60B are also arranged, three on each of the two side surfaces of the holder 253B facing the front surface and the back surface of the electronic cassette 30, and one on the inner surface of the top plate of the lid 252. Further, three ultraviolet sources 60C are arranged on each of the two side surfaces of the holder 253C facing the front surface and the back surface of the electronic cassette 30, and one on the inner surface of the top plate of the lid 252, for a total of seven. The ultraviolet source 60B irradiates the electronic cassette 30 housed in the holder 253B with ultraviolet rays. Further, the ultraviolet source 60C irradiates the electronic cassette 30 housed in the holder 253C with ultraviolet rays. In FIG. 33, in order to avoid complication, only one ultraviolet source 60B arranged on the two side surfaces of the holder 253B and one ultraviolet source 60C arranged on the two side surfaces of the holder 253C are shown.

The holder 253A is provided with a detection sensor 254A. The detection sensor 254A detects whether or not the electronic cassette 30 is housed inside the holder 253A. Similarly, the holder 253B is provided with the detection sensor 254B, and the holder 253C is provided with the detection sensor 254C. The detection sensor 254B detects whether or not the electronic cassette 30 is housed inside the holder 253B. Further, the detection sensor 254C detects whether or not the electronic cassette 30 is housed inside the holder 253C. In the following, the detection sensors 254A to 254C may be collectively referred to as the detection sensor 254.

A lid sensor 255 is provided at the engagement portion of the cradle body 251 with the lid 252. The lid sensor 255 detects the opening and closing of the lid 252.

The holder 253A is provided with a power feeding unit 256A. The power feeding unit 256A supplies electric power for charging the battery 57 of the electronic cassette 30 housed in the holder 253A. Similarly, the holder 253B is provided with a power feeding unit 256B, and the holder 253C is provided with a power feeding unit 256C. The power feeding unit 256B supplies electric power for charging the battery 57 of the electronic cassette 30 housed in the holder 253B. Further, the power feeding unit 256C supplies electric power for charging the battery 57 of the electronic cassette 30 housed in the holder 253C. The power feeding units 256A to 256C supply electric power via, for example, a connection terminal. Alternatively, the power feeding units 256A to 256C may supply electric power by non-contact power feeding such as an electromagnetic induction method using a coil.

As an example, as shown in FIG. 34, in the ultraviolet source control unit of the seventh embodiment, the electronic cassette 30 is placed inside the holder 253 by the detection sensor 254, similarly to the ultraviolet source control unit 79 of the first embodiment. When it is detected that the accommodation is contained (detection sensor 254 is ON) and that the lid 252 is closed by the lid sensor 255 (the lid sensor 255 is ON), the ultraviolet source 60 is instructed to irradiate ultraviolet rays. ..

Further, the ultraviolet source control unit stops the irradiation of ultraviolet rays on the ultraviolet source 60 when the set time TS has elapsed since the irradiation of ultraviolet rays was started. While the ultraviolet rays are being irradiated in this way, the display control unit of the seventh embodiment notifies the remaining time until the elapsed time reaches the set time as information, similarly to the display control unit 103 of the first embodiment. Control to do. In this case, the display for displaying information is provided, for example, on the front surface of the cradle main body 251 or on the outer surface of the top plate of the lid 252.

As an example, as shown in FIG. 35, when the ultraviolet source control unit detects that the lid 252 has been opened by the lid sensor 255 before the set time TS elapses after the irradiation of ultraviolet rays is started, the ultraviolet rays are emitted. The source 60 is stopped from irradiating with ultraviolet rays. In addition, the display control unit controls to notify as information a warning that sterilization by ultraviolet rays has not been completed. When it is detected again by the lid sensor 255 that the lid 252 is closed, the ultraviolet source control unit causes the ultraviolet source 60 to resume irradiation with ultraviolet rays. Here, when the lid sensor 255 detects that the lid 252 has been opened, it is an example of "when the radiographic cassette is about to be taken out from the holder" according to the technique of the present disclosure.

As described above, in the seventh embodiment, the accommodating device for the radiographic cassette is a cradle 250 having a function of charging the battery 57 of the electronic cassette 30 accommodated in the holder 253. Therefore, the battery 57 can be sterilized by ultraviolet rays while being charged. Further, the cradle 250 can also exert the effect that it is possible to suppress the use of the electronic cassette 30 without completing the sterilization by ultraviolet rays.

Similar to the holder 253, the holders 27, 128, 158A to 158C, 163A to 163C, and 212 may be provided with a function of charging the battery 57 of the electronic cassette 30.

The holder 212 of the sixth embodiment and the holder 253 of the seventh embodiment also have a configuration capable of accommodating the electronic cassette 30 in a state where the grid 150 is attached, like the holders 158A to 158C of the third embodiment. May be.

The remaining time may be notified by voice and / or a lamp such as an LED. When notifying by voice, the remaining time itself is announced. Alternatively, a fixed sound may be sounded a number of times according to the remaining time, for example, if the remaining time is 2 minutes, a beep sound may be sounded twice. When notifying with a lamp, the lamp is blinked three times according to the remaining time, for example, if the remaining time is 3 minutes, the lamp is blinked three times.

A warning that sterilization by ultraviolet rays has not been completed may also be notified by voice and / or a lamp. When notifying by voice, the warning itself that the sterilization by ultraviolet rays is not completed is announced. Alternatively, a warning sound such as a siren may be sounded. When notifying with a lamp, a red or orange rotation warning light is emitted. In the case of notifying by voice, the voice control unit that controls the operation of the speaker that outputs the voice is an example of the "notification control unit" according to the technique of the present disclosure. Further, in the case of notification by a lamp, the lamp control unit that controls the operation of the lamp is an example of the "notification control unit" according to the technique of the present disclosure.

The number of holders may be four or more, or one. The ultraviolet source 60 may be arranged at least on the front surface of the electronic cassette 30 at a position where ultraviolet rays can be irradiated. In order to irradiate the ultraviolet rays more efficiently, a reflector that reflects the ultraviolet rays may be provided on the holder and / or the lid.

If the holder has a size that allows the entire electronic cassette 30 to fit comfortably, the lid may not be necessary. In this case, when the electronic cassette 30 is taken out from the holder, a pop-up structure for pushing out the electronic cassette 30 from the holder with a spring or the like may be provided so that the electronic cassette 30 can be easily taken out.

Even when the electronic cassette 30 is not attached to the holder, ultraviolet rays may be irradiated by the ultraviolet source 60 for the purpose of sterilizing the inside of the holder.

In each of the above embodiments, when the electronic cassette 30 is housed inside the holder 27 and the lid 26 is closed, the ultraviolet source control unit 79 causes the ultraviolet source 60 to irradiate the ultraviolet source 60 with ultraviolet rays. Not limited to. A switch for turning on / off the power of the ultraviolet source 60 may be provided, and the ultraviolet source 60 may irradiate the ultraviolet light manually by the operator. The switch for turning on / off the power of the ultraviolet source 60 may be a physical switch such as the lock forced release switch 132 of the second embodiment, or may be a GUI displayed on the display 51.

The ultraviolet source 60 may be continuously irradiated with ultraviolet rays, or may be irradiated with ultraviolet rays in a pulse shape. When irradiating ultraviolet rays in a pulse shape, the intensity of the fifth embodiment is changed by changing the duty ratio of the pulse.

The number of ultraviolet sources 60 is not limited to 9 or 7 as illustrated. For example, a total of three may be used, one on each of the two side surfaces of the holder 27 facing the front surface and the back surface of the electronic cassette 30, and one on the inner surface of the top plate of the lid 26. Alternatively, a total of 12 may be used, 5 on each of the two side surfaces of the holder 27 facing the front surface and the back surface of the

electronic cassette

30, and 2 on the inner surface of the top plate of the lid 26.

In each of the above embodiments, an electronic cassette is exemplified as a cassette for radiography, but the technique of the present disclosure is not limited to this. Instead of or in addition to the electronic cassette, a CR cassette in which the imaging plate is housed in a portable housing may be used.

The detection sensor 61 detects that the electronic cassette 30 is housed inside the holder 27 or 128 (the detection sensor 61 is ON), and the lid sensor 62 detects that the

lid

26 or 127 is closed (the lid sensor 62). Is not turned on immediately, but the irradiation of ultraviolet rays is not started immediately, but after a predetermined time has passed since the

lid

26 or 127 was closed, for example, 10 seconds after the

lid

26 or 127 was closed. Irradiation may be started.

Similarly, the attachment / detachment sensor 222 detects that the electronic cassette 30 is attached to the tray 220 (the attachment / detachment sensor 222 is ON), and the insertion / removal sensor 223 detects that the tray 220 is inserted into the holder 212 (insertion / removal). When the sensor 223 is turned on), the irradiation of ultraviolet rays is not started immediately, but a predetermined time has elapsed since the tray 220 was inserted into the holder 212, for example, 10 seconds after the tray 220 was inserted into the holder 212. After that, irradiation with ultraviolet rays may be started.

The elapsed time from the start of ultraviolet irradiation is measured by the measuring unit 80 built in the CPU 71, but the time is not limited to this. The elapsed time may be measured by hardware such as an RC (Resistance Capacitor) integrator circuit.

In each of the above embodiments, for example, the irradiation condition acquisition unit 75, the radiation source control unit 76, the image acquisition unit 77, the image transfer unit 78, the ultraviolet

source control unit

79, 170, and 181, the

measurement units

80 and 171 and the shooting menu reception are received. As a hardware structure of a processing unit (Processing Unit) that executes various processes such as a unit 100, an irradiation condition setting unit 101, an image processing unit 102, a display control unit 103, a take-out prohibition control unit 140, and a RW control unit 172. Can use various processors (Processors) shown below. As described above, various processors include FPGAs (Field Programmable Gate Array) in addition to

CPUs

71 and 91, which are general-purpose processors that execute software (operation programs 72 and 94) and function as various processing units. It has a circuit configuration specially designed to execute a specific process such as a programmable logic device (Programmable Logic Device: PLD), an ASIC (Application Specific Integrated Circuit), which is a processor whose circuit configuration can be changed after manufacturing. A dedicated electric circuit that is a processor is included.

One processing unit may be composed of one of these various processors, or may be a combination of two or more processors of the same type or different types (for example, a combination of a plurality of FPGAs and / or a CPU). It may be configured in combination with FPGA). Further, a plurality of processing units may be configured by one processor.

As an example of configuring a plurality of processing units with one processor, first, one processor is configured by a combination of one or more CPUs and software, as represented by a computer such as a client and a server. There is a form in which the processor functions as a plurality of processing units. Secondly, as typified by system on chip (System On Chip: SoC), there is a form of using a processor that realizes the functions of the entire system including a plurality of processing units with one IC (Integrated Circuit) chip. be. As described above, the various processing units are configured by using one or more of the above-mentioned various processors as a hardware-like structure.

Further, as the hardware structure of these various processors, more specifically, an electric circuit (cyclery) in which circuit elements such as semiconductor elements are combined can be used.

The techniques of the present disclosure can also be appropriately combined with the various embodiments described above and / or various modifications. Further, it is of course not limited to each of the above embodiments, and various configurations can be adopted as long as they do not deviate from the gist.

The description and illustrations shown above are detailed explanations of the parts related to the technique of the present disclosure, and are merely an example of the technique of the present disclosure. For example, the description of the configuration, function, action, and effect described above is an example of the configuration, function, action, and effect of a portion of the art of the present disclosure. Therefore, unnecessary parts may be deleted, new elements may be added, or replacements may be made to the above-mentioned description contents and illustration contents within the range not deviating from the gist of the technique of the present disclosure. Needless to say. In addition, in order to avoid complications and facilitate understanding of the parts relating to the technique of the present disclosure, the contents described above and the contents shown above require special explanation in order to enable the implementation of the technique of the present disclosure. The explanation about the common technical knowledge that is not used is omitted.

In the present specification, "A and / or B" is synonymous with "at least one of A and B". That is, "A and / or B" means that it may be A alone, B alone, or a combination of A and B. Further, in the present specification, when three or more matters are connected and expressed by "and / or", the same concept as "A and / or B" is applied.

All documents, patent applications and technical standards described herein are to the same extent as if it were specifically and individually stated that the individual documents, patent applications and technical standards are incorporated by reference. Incorporated by reference in the book.

Claims

A holder for accommodating a cassette for radiography,
An ultraviolet source that irradiates the radiographic cassette housed in the holder with ultraviolet rays,
When a preset set time has elapsed from the start of the irradiation of the ultraviolet rays, the ultraviolet source control unit for stopping the irradiation of the ultraviolet rays to the ultraviolet source, and the ultraviolet source control unit.
It is prohibited to take out the radiographic cassette from the holder before the set time elapses and the notification control unit that controls the notification of the progress of sterilization of the radiographic cassette by the ultraviolet rays. At least one of the take-out prohibition control units that perform control,
Accommodating device for radiography cassettes.
The accommodating device for radiography cassette according to claim 1, wherein the notification control unit controls to notify the remaining time until the set time is reached as the information.
When the notification control unit tries to take out the radiographic imaging cassette from the holder before the set time elapses, or before the set time elapses, the radiological imaging cassette from the holder. The accommodating device for radiography cassette according to claim 1 or 2, wherein when the sterilization by ultraviolet rays is taken out, a warning that the sterilization by ultraviolet rays is not completed is notified as the information.
The take-out prohibition control unit accommodates the radiological imaging cassette according to any one of claims 1 to 3, in which the take-out prohibition control unit cancels the removal prohibition of the radiological imaging cassette from the holder in response to an operator's instruction. Device.
There are multiple holders
The accommodating device for an radiography cassette according to any one of claims 1 to 4, wherein at least one of the notification control unit and the removal prohibition control unit performs the control for each of the plurality of holders. ..
The accommodating device for an radiographic cassette according to any one of claims 1 to 5, wherein the holder can accommodate the radiographic cassette in a state where a grid for removing scattered radiation is attached. ..
The accommodating device for a cassette for radiography according to any one of claims 1 to 6, further comprising a storage control unit for storing the irradiation time of the ultraviolet rays in the storage unit.
There are multiple cassettes for radiography,
The storage device for a radiography cassette according to claim 7, wherein the memory control unit stores the irradiation time for each of a plurality of the radiography cassettes.
The ultraviolet source control unit changes the sterilizing ability of the ultraviolet rays in response to an operator's instruction to switch between a normal sterilization mode in which the set time is relatively long and a rapid sterilization mode in which the set time is relatively short. The accommodating device for a cassette for radiography according to any one of claims 1 to 8.
The accommodating device for radiography cassette according to claim 9, wherein the ultraviolet source control unit changes the sterilizing ability by changing at least one of the intensity and wavelength of the ultraviolet rays.
The radiography cassette is an electronic cassette in which a detection panel and a battery are housed in a portable housing.
The accommodating device for a radiographic cassette according to any one of claims 1 to 10, which is a cradle having a function of charging the battery of the electronic cassette housed in the holder.
A radiological diagnostic apparatus including the accommodating device for the cassette for radiography according to any one of claims 1 to 11.
It is equipped with a radiation source that irradiates radiation, and has a main body with wheels for running.
The radiation diagnostic apparatus according to claim 12, wherein the holder is provided in the main body portion.
It is equipped with at least one of a standing position photographing table for photographing a patient in a standing position and a lying position photographing table for photographing the patient in a lying position.
The radiological diagnostic apparatus according to claim 12, wherein the holder is provided on at least one of the standing position photographing table and the lying position photographing table.
It is a method of operating the accommodating device of the radiographic cassette including a holder for accommodating the radiographic cassette.
Irradiating the radiographic cassette housed in the holder with ultraviolet rays from an ultraviolet source.
When a preset set time has elapsed from the start of the irradiation of the ultraviolet rays, the ultraviolet source is controlled to stop the irradiation of the ultraviolet rays, and the irradiation of the ultraviolet rays is stopped.
A control for notifying information on the progress of sterilization of the radiographic cassette by the ultraviolet rays, and a control for prohibiting the removal of the radiographic cassette from the holder before the set time elapses. At least one of the things to do,
How to operate the accommodating device of the cassette for radiography including.