WO2022138575A1 - Instrument médical - Google Patents

Instrument médical Download PDF

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Publication number
WO2022138575A1
WO2022138575A1 PCT/JP2021/047063 JP2021047063W WO2022138575A1 WO 2022138575 A1 WO2022138575 A1 WO 2022138575A1 JP 2021047063 W JP2021047063 W JP 2021047063W WO 2022138575 A1 WO2022138575 A1 WO 2022138575A1
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WIPO (PCT)
Prior art keywords
ultraviolet
medical device
radiation
irradiation
floor surface
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Application number
PCT/JP2021/047063
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English (en)
Japanese (ja)
Inventor
吉光 工藤
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富士フイルム株式会社
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Application filed by 富士フイルム株式会社 filed Critical 富士フイルム株式会社
Publication of WO2022138575A1 publication Critical patent/WO2022138575A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment

Definitions

  • the technology disclosed here relates to medical devices.
  • Japanese Patent Application Laid-Open No. 09-253083 describes ultraviolet rays for sterilizing the floor surface by irradiating the floor surface with ultraviolet rays in a medical device having traveling wheels such as a mobile radiation generator and an ultrasonic diagnostic device. It is stated that a source will be provided.
  • an optical fiber is connected to an ultraviolet source, and ultraviolet rays are irradiated from the emission end of the optical fiber toward the floor surface.
  • sterilization means inactivating bacteria and / or viruses.
  • the floor surface is one of the typical sources of bacterial and / or virus infection. Therefore, it makes sense to sterilize the floor surface with ultraviolet rays as in JP-A-09-253083.
  • the exit end of the optical fiber which is the ultraviolet light emitting portion, is visible from the front and the side of the medical device. Therefore, there is a risk that the surroundings of the medical device are unintentionally irradiated with ultraviolet rays.
  • One embodiment of the technique of the present disclosure provides a medical device capable of sterilizing a floor surface with ultraviolet rays while reducing the risk of unintentional irradiation of the surroundings with ultraviolet rays.
  • the medical device of the present disclosure has wheels, and the trolley part running on the floor surface, the ultraviolet light emitting part that irradiates the floor surface with ultraviolet rays, and the ultraviolet light emitting part are made invisible from the outside. It is provided with a cover part to be used.
  • the cover portion is preferably a storage groove including an ultraviolet irradiation opening formed on the surface of the carriage portion facing the floor surface and accommodating the ultraviolet light emitting portion so as to cover the upper side, the front side, and the side surface. ..
  • the cover portion is a storage box attached to the trolley portion, and has a storage space that covers the upper part, the front side, and the side surface of the ultraviolet light emitting part, and an ultraviolet irradiation opening is formed on the surface facing the floor surface. It is preferably a storage box. In this case, the storage box is removable from the trolley portion.
  • the cover part is a storage hood attached to the trolley part, and has a storage space covering the upper part, the front side, and the side of the ultraviolet light emitting part, and a skirt-shaped storage hood in which the part facing the floor surface is open. Is preferable. In this case, it is preferable that the accommodation hood is removable from the carriage portion.
  • the ultraviolet light emitting portion irradiates the range corresponding to the width of the trolley portion with ultraviolet rays.
  • the ultraviolet light emitting portion irradiates the range within the width of the trolley portion with ultraviolet rays.
  • a plurality of ultraviolet light emitting portions are arranged along the width direction of the carriage portion.
  • a plurality of ultraviolet light emitting parts are arranged along the front-rear direction of the bogie part.
  • the mobile radiation generator has a radiation source that emits radiation.
  • the radiation fluoroscopy apparatus performs fluoroscopic imaging in which radiographic images are continuously captured.
  • the technique of the present disclosure it is possible to provide a medical device capable of sterilizing the floor surface by ultraviolet rays while reducing the possibility of unintentional irradiation of the surroundings with ultraviolet rays.
  • the mobile radiation generator 2 includes a trolley unit 10.
  • the bogie portion 10 has a front wheel 11, a rear wheel 12, a rear wheel drive unit 13, and an ultraviolet source 14, and the front wheel 11 and the rear wheel 12 travel on the floor surface 15 of a medical facility.
  • the mobile radiation generator 2 is an example of a "medical device” according to the technique of the present disclosure.
  • the front wheels 11 and the rear wheels 12 are examples of "wheels" according to the technique of the present disclosure.
  • the front wheels 11 are a pair of left and right casters that turn around the Z axis indicating the height direction of the mobile radiation generator 2. Like the front wheels 11, the rear wheels 12 are paired on the left and right, but do not turn around the Z axis. However, the rear wheel 12 is rotated by the rear wheel drive unit 13 around the Y axis indicating the width direction of the mobile radiation generator 2. The front wheel 11 rotates in accordance with the rotation of the rear wheel 12. That is, the bogie portion 10 has four wheels and is a rear wheel drive type. The type is not limited to the rear wheel drive type, and the front wheel 11 may be a front wheel drive type in which the front wheels 11 are rotated around the Y axis by the front wheel drive unit. Further, the front wheel 11 may be rotated around the Y axis by the front wheel drive unit, and the rear wheel 12 may be rotated around the Y axis by the rear wheel drive unit, which may be an all-wheel drive type.
  • the rear wheel drive unit 13 is two motors connected to the left and right rear wheels 12.
  • the rear wheel drive unit 13 rotates the left and right rear wheels 12 independently. Therefore, when the rotation speed of the rear wheel 12 on the right side of the rear wheel 12 on the left side is increased by the rear wheel drive unit 13, the mobile radiation generator 2 turns to the left. On the other hand, when the rotation speed of the rear wheel 12 on the left side of the rear wheel 12 on the right side is increased by the rear wheel drive unit 13, the mobile radiation generator 2 turns to the right.
  • the mobile radiation generator 2 can be moved in the medical facility by the trolley unit 10.
  • the mobile radiation generator 2 is used for so-called round-trip radiography, in which radiography is taken while rotating around the hospital room. Therefore, the mobile radiation generator 2 is also called a round-trip car.
  • the mobile radiation generator 2 can be brought into the operating room and radiographed during the operation.
  • the ultraviolet source 14 is provided at the tip of the carriage portion 10 in front of the front wheel 11 of the carriage portion 10.
  • the ultraviolet source 14 irradiates the floor surface 15 with ultraviolet UV for sterilization.
  • an LED Light Emitting Diode
  • an LD Laser Diode
  • the ultraviolet UV irradiated by the ultraviolet source 14 has a center wavelength of 200 nm or more and 280 nm or less, for example, 222 nm or 254 nm, and the intensity is constant.
  • the ultraviolet source 14 is an example of the "ultraviolet light emitting unit" according to the technique of the present disclosure.
  • the main body 20 is mounted on the bogie 10.
  • the main body portion 20 includes a central portion 21, a holder portion 22, a strut portion 23, an arm portion 24, a radiation source 25, and the like.
  • the mobile radiation generator 2 is moved in a state shown by a broken line in FIG. 1 in which the radiation source 25 is housed in the upper part of the central portion 21.
  • the holder portion 22 is arranged on the back surface of the central portion 21.
  • the holder portion 22 houses the electronic cassette 30 in a detachable manner.
  • the electronic cassette 30 is a radiation detector that detects a radiation image represented by an electric signal based on the radiation transmitted through a patient, and is a portable radiation detection capable of wireless communication with a built-in battery. It is a vessel. That is, the electronic cassette 30 is an example of the "radiation detector" according to the technique of the present disclosure.
  • the holder unit 22 can accommodate a plurality of electronic cassettes 30 having a plurality of types regardless of the type. Further, the holder portion 22 has a function of charging the battery of the housed electronic cassette 30.
  • the electronic cassette 30 has a detection panel 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 electronic cassette 30 includes a control circuit that controls the operation of the detection panel, a signal processing circuit that converts the signal charge of pixels into pixel values, and the like to generate a radiographic image. It is built-in. Further, a wireless communication unit or the like that performs wireless communication with the control device 40 is also built-in.
  • the electronic cassette 30 has a function of detecting the start and end of irradiation of radiation.
  • the control circuit that controls the operation of the detection panel causes the detection panel to perform the storage operation of accumulating the signal charge in the pixel.
  • the control circuit causes the detection panel to perform a read operation of reading the accumulated signal charge from the pixel. As a result, a radiographic image is output from the detection panel.
  • a handle 35 is provided at a position protruding above the central portion 21.
  • the handle 35 has a long columnar shape in the Y-axis direction.
  • the handle 35 is gripped by an operator such as a radiological technologist in order to steer the carriage portion 10.
  • the dolly unit 10 travels on the floor surface 15 by operating the handle 35 of the operator.
  • the operation of the handle 35 of the operator is an operation in which the operator grips the handle 35 to change the method of applying the force to the handle 35 or adjust the direction in which the force is applied to the handle 35.
  • the operator independently determines the traveling speed and the traveling direction of the trolley unit 10 by operating the handle 35, and causes the trolley unit 10 to travel.
  • the rear wheel drive unit 13 is also driven according to the operation of the operator's steering wheel 35.
  • the drive of the rear wheel drive unit 13 is a drive according to the force applied to the bogie unit 10 by the operator. Therefore, as a matter of course, the bogie portion 10 does not travel unless the operator's force is applied. On the contrary, the bogie unit 10 does not travel only by the power of the operator, and the bogie unit 10 travels only with the assistance of the rear wheel drive unit 13.
  • the force applied to the carriage unit 10 by the operator is detected by using, for example, a piezoelectric sensor 85 (see FIG. 4), and the rear wheel drive unit 13 is driven according to the detection result.
  • An irradiation switch 36 is attached to the upper part of the holder portion 22.
  • the irradiation switch 36 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 36, and the irradiation switch 36 can be used by removing it from the central portion 21.
  • the irradiation switch 36 is, for example, a two-step pressing type.
  • the irradiation switch 36 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 central portion 21 has a built-in battery that supplies electric power to each portion.
  • the strut portion 23 is a prismatic column and is erected along the Z-axis direction.
  • the strut portion 23 is arranged at a position above the front wheel 11 and at a position at the center of the bogie portion 10 with respect to the Y-axis direction.
  • a voltage generator 37 is provided in the support column 23.
  • the arm portion 24 is prismatic like the strut portion 23.
  • the base end of the arm portion 24 is attached to the support column portion 23, and the radiation source 25 is attached to the tip of the arm portion 24 which is a free end opposite to the base end.
  • the radiation source 25 has a built-in radiation tube 38. Further, an irradiation field limiting device 39 is attached to the radiation source 25.
  • the radiation tube 38 is provided with a filament, a target, a grid electrode, and the like (all not shown).
  • a voltage from the voltage generator 37 is applied between the filament as the cathode and the target as 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 voltage generator 37.
  • 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.
  • the tube current irradiation time product that is, the so-called mAs value may be used as the irradiation condition.
  • the irradiation switch 36 When the irradiation switch 36 is pressed halfway 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.
  • the irradiation switch 36 When the irradiation switch 36 is fully pressed to generate an irradiation start instruction signal in the state where this warm-up is completed, a tube voltage is applied from the voltage generator 37 and radiation is generated from the radiation tube 38.
  • 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 39 limits the irradiation field of the radiation generated from the radiation tube 38.
  • the irradiation field limiting device 39 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 39 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 40 and the console 41 are built in the central portion 21.
  • the control device 40 controls the operation of the radiation source 25 through the voltage generator 37.
  • the control device 40 acquires radiation irradiation conditions from the console 41.
  • the control device 40 operates the voltage generator 37 under the irradiation conditions acquired from the console 41 to irradiate the radiation from the radiation tube 38. Further, the control device 40 receives the radiographic image transmitted from the electronic cassette 30.
  • the control device 40 transfers the radiographic image to the console 41.
  • the console 41 is embedded in the inclined upper surface of the central portion 21.
  • the console 41 is communicably connected to a radiological information system (RIS) via a network such as a LAN (Local Area Network).
  • RIS radiological information system
  • the console 41 receives a shooting order from RIS.
  • the radiography order describes the specific details of the radiological radiography performed on the patient.
  • the console 41 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 radiation images from the console 41 and stores and manages the received radiation images.
  • PACS Picture Archiving and Communication System
  • the operator inputs a shooting menu according to the shooting order to the console 41.
  • the console 41 transmits the irradiation conditions according to the input shooting menu to the control device 40. Further, the console 41 receives the radiographic image transferred from the control device 40, performs image processing on the received radiographic image, and displays the radiographic image after the image processing on the display 89 (see FIG. 4).
  • the strut portion 23 has a first strut 50 and a second strut 51.
  • the first support column 50 is provided on the upper surface of the carriage portion 10.
  • the first support column 50 can rotate about the Z axis with respect to the carriage portion 10.
  • the second support column 51 can be expanded and contracted up and down with respect to the first support column 50 along the Z-axis direction.
  • the arm portion 24 has a fixed arm 54, a first arm 55, and a second arm 56.
  • the fixed arm 54 is bent at a right angle to the second support column 51.
  • the base end of the fixed arm 54 is attached to the second support column 51.
  • a first arm 55 is attached to the tip of the fixed arm 54. That is, the fixed arm 54 connects the second support column 51 and the first arm 55.
  • a radiation source 25 is attached to the tip of the second arm 56.
  • the first arm 55 moves back and forth with respect to the fixed arm 54 along the bent direction of the fixed arm 54 (the X-axis direction indicating the front-back direction of the mobile radiation generator 2 in FIG. 1), which is orthogonal to the Z-axis. It can be expanded and contracted.
  • the second arm 56 can expand and contract back and forth with respect to the first arm 55 along the bending direction of the fixed arm 54 (the X-axis direction in FIG. 1) orthogonal to the Z axis.
  • the radiation source 25 can rotate about an axis parallel to its width direction (Y axis in FIG. 1). Further, although not shown, the radiation source 25 can rotate about an axis (X-axis in FIG. 1) parallel to the front-back direction thereof.
  • the bottom surface 10A of the trolley portion 10 facing the floor surface 15 accommodates a substantially V-shaped cross section including an ultraviolet UV irradiation opening 60.
  • a groove 61 is formed.
  • the ultraviolet source 14 is accommodated in the innermost part of the accommodating groove 61.
  • the accommodating groove 61 makes the ultraviolet source 14 invisible from the outside. More specifically, the accommodation groove 61 covers the upper, anterior, and lateral sides of the ultraviolet source 14 other than the lower side facing the floor surface 15.
  • the irradiation opening 60 has a rectangular shape, and defines the irradiation range of the ultraviolet UV on the floor surface 15.
  • "make it invisible from the outside” means at least, for example, a chair (including a wheelchair) having a line of sight in a height range of 50 cm to 70 cm (assuming a child) or 100 cm to 120 cm (assuming an adult). It means that the ultraviolet source 14 (ultraviolet light emitting part) is not directly seen by a sitting person.
  • the ultraviolet source 14 irradiates the ultraviolet UV in a range corresponding to the width W of the carriage portion 10 defined by the irradiation opening 60 shown in FIG. More specifically, the ultraviolet source 14 irradiates the range within the width W of the carriage portion 10 with ultraviolet UV. Therefore, when viewed from above, the ultraviolet UV does not protrude from the carriage portion 10.
  • the width W is about 60 cm to 90 cm.
  • the control device 40 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 is stored in the storage 70.
  • 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 a travel control unit 79. And functions as an ultraviolet source control unit 80.
  • the irradiation condition acquisition unit 75 acquires the irradiation condition transmitted from the console 41.
  • 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 25.
  • the radiation source control unit 76 sets the irradiation conditions from the irradiation condition acquisition unit 75 in the voltage generator 37.
  • the radiation source control unit 76 irradiates radiation from the radiation tube 38 under the set irradiation conditions.
  • the image acquisition unit 77 receives the radiation image transmitted from the electronic cassette 30, and outputs the received radiation image to the image transfer unit 78.
  • the image transfer unit 78 transfers the radiographic image from the image acquisition unit 77 to the console 41.
  • the travel control unit 79 drives the rear wheel drive unit 13 according to the force applied to the bogie unit 10 by the operator via the handle 35 detected by the piezoelectric sensor 85, and causes the bogie unit 10 to travel.
  • the traveling control unit 79 starts the traveling of the bogie unit 10 by driving the rear wheel driving unit 13
  • the traveling control unit 79 outputs a traveling start signal (see FIG. 5) to that effect to the ultraviolet source control unit 80.
  • the traveling control unit 79 outputs a traveling stop signal (see FIG. 5) to that effect to the ultraviolet source control unit 80. do.
  • the ultraviolet source control unit 80 controls the operation of the ultraviolet source 14 based on the travel start signal and the travel stop signal from the travel control unit 79.
  • the console 41 includes an operation console 88, a display 89, a storage 90, and a CPU 91.
  • the console 88 is operated by an operator when setting radiation irradiation conditions and the like.
  • the display 89 displays various screens including an irradiation condition setting screen, a radiation image, and the like.
  • 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.
  • 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).
  • the display control unit 103 Prior to radiological imaging, the display control unit 103 displays a list of imaging orders from RIS on the display 89. 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 89 in a form that can be selectively selected. By operating the console 88, 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 40.
  • 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 88 before being transmitted to the control device 40.
  • the image processing unit 102 performs various image processing on the radiation image from the control device 40.
  • 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 in pixel units.
  • the image processing unit 102 performs this offset correction processing to remove fixed pattern noise caused by dark charges and the like from the radiation image.
  • the sensitivity correction process is a process for correcting variations in the sensitivity of each pixel of the detection panel 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 subjected to such various image processing to the display control unit 103.
  • the display control unit 103 displays the radiation image from the image processing unit 102 on the display 89.
  • the ultraviolet source control unit 80 starts irradiating the ultraviolet source 14 with ultraviolet UV when the traveling of the bogie unit 10 is started and a traveling start signal is input from the traveling control unit 79. Let me. Further, when the traveling of the carriage unit 10 is stopped and the traveling stop signal is input from the traveling control unit 79, the ultraviolet source control unit 80 stops the irradiation of the ultraviolet UV to the ultraviolet source 14. Specifically, the ultraviolet source control unit 80 stops the irradiation of the ultraviolet UV to the ultraviolet source 14 when the preset time TS has elapsed after the traveling of the trolley unit 10 is stopped.
  • the set time TS varies depending on the intensity of ultraviolet UV rays, the type of bacteria and / or virus to be sterilized, and the like, but is generally several seconds to several minutes. For example, it has been reported that a new type of coronavirus (SARS (Severe Acute Respiratory Syndrome) -CoV (Coronavirus) -2) is inactivated by irradiation with ultraviolet UV rays for several seconds. More specifically, it has been reported that 99.7% of UV rays with a center wavelength of 222 nm and an intensity of 1 W / m 2 are inactivated by irradiation for 30 seconds (https://xtech.nikkei.com/atcl/).
  • SARS severe Acute Respiratory Syndrome
  • -CoV Coronavirus
  • the operation program 72 when the operation program 72 is activated, the CPU 71 of the control device 40 starts the irradiation condition acquisition unit 75, the radiation source control unit 76, the image acquisition unit 77, the image transfer unit 78, and the travel control unit 79. , And functions as an ultraviolet source control unit 80.
  • the operation program 94 When the operation program 94 is activated, the CPU 91 of the console 41 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.
  • the imaging preparation work is a work of setting irradiation conditions and a work of positioning a patient or the like.
  • the operator operates the irradiation switch 36 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 88 as the work of setting the irradiation conditions.
  • the shooting menu is accepted by the shooting menu reception unit 100.
  • 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 40.
  • the operator After inputting the photographing menu, the operator inserts the electronic cassette 30 under the patient lying on the bed, or operates the support column 23, the arm portion 24, etc. according to the position of the inserted electronic cassette 30 to generate a radiation source. Positioning is performed by adjusting the position of 25.
  • the irradiation condition acquisition unit 75 acquires the irradiation condition from the console 41.
  • the irradiation conditions are output from the irradiation condition acquisition unit 75 to the radiation source control unit 76, and are set in the voltage generator 37 by the radiation source control unit 76.
  • radiographic image is output from the electronic cassette 30.
  • the radiographic image 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 is transferred to the console 41 by the image transfer unit 78.
  • various image processings are applied to the radiation image by the image processing unit 102.
  • the radiation image 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 89 and is used for viewing by the operator.
  • the handle 35 When moving between hospital rooms in a medical facility, the handle 35 is operated by an operator and the trolley portion 10 runs on the floor surface 15. At this time, under the control of the travel control unit 79, the rear wheel drive unit 13 is driven to assist the travel of the bogie unit 10. A travel start signal is output from the travel control unit 79 to the ultraviolet source control unit 80.
  • step ST100 when the traveling of the bogie unit 10 is started and the traveling start signal is output from the traveling control unit 79 to the ultraviolet source control unit 80 (YES in step ST100), the ultraviolet source control unit 80 Under control, irradiation of ultraviolet UV from the ultraviolet source 14 is started (step ST110). Irradiation of the ultraviolet UV is continued until the traveling of the carriage unit 10 is stopped and the traveling stop signal is not output from the traveling control unit 79 to the ultraviolet source control unit 80 (NO in step ST120, step ST130).
  • a travel stop signal is output from the travel control unit 79 to the ultraviolet source control unit 80 (YES in step ST120).
  • the mobile radiation generator 2 has a front wheel 11 and a rear wheel 12, a carriage portion 10 traveling on the floor surface 15, an ultraviolet source 14 for irradiating the floor surface 15 with ultraviolet UV rays, and ultraviolet rays. It is provided with a storage groove 61 that makes the source 14 invisible from the outside. For this reason, the emission end of the optical fiber, which is the ultraviolet light emitting portion, is unintentionally irradiated with ultraviolet UV to the surroundings, as compared with the technique described in Japanese Patent Application Laid-Open No. 09-253083, which is visible from the front and side of the medical device. It is possible to sterilize the floor surface 15 with ultraviolet rays while reducing the risk of being damaged. Since the floor surface 15 is one of the representative sources of bacterial and / or virus infection, the spread of bacterial and / or virus infection can be prevented more effectively.
  • the mobile radiation generator 2 starts irradiation with ultraviolet UV rays when the traveling of the trolley unit 10 is started, and when the traveling of the trolley unit 10 is stopped, the ultraviolet UV is UV. Stop the irradiation of. Therefore, wasteful power consumption can be suppressed.
  • the mobile radiation generator 2 stops the irradiation of ultraviolet UV rays when the preset time TS has elapsed after the traveling of the carriage portion 10 is stopped. Therefore, the floor surface 15 at the stop position of the carriage portion 10 can be sufficiently sterilized. Further, even when the traveling of the carriage portion 10 is temporarily stopped and immediately restarted, sterilization can be continuously performed.
  • the ultraviolet source 14 irradiates the ultraviolet UV in the range corresponding to the width W of the carriage portion 10. Therefore, the floor surface 15 under the carriage portion 10 can be sterilized without waste.
  • the ultraviolet source 14 irradiates the range within the width W of the carriage portion 10 with ultraviolet UV. Therefore, it is possible to reduce the possibility that the ultraviolet UV reflected from the floor surface 15 is applied to a person such as a patient or an operator.
  • the medical device is a mobile radiation generator 2 having a radiation source 25 that emits radiation. Since the mobile radiation generator 2 is used for round-trip radiography in which radiography is taken while going around the hospital room, it moves over a wide area of a medical facility with a relatively high frequency. Therefore, the floor surface 15 of the medical facility can be frequently and thoroughly sterilized.
  • the number of UV sources 14 installed is not limited to one as shown in the example.
  • a plurality of ultraviolet sources 14 may be arranged along the width direction (Y-axis) of the carriage portion 10.
  • the ultraviolet sources 14 are arranged so as to partially overlap the ultraviolet UV irradiation ranges of the adjacent ultraviolet sources 14.
  • FIG. 7 shows an example in which three ultraviolet sources 14 are arranged side by side.
  • the illuminance distribution of the ultraviolet UV emitted from the ultraviolet source 14 is generally relatively high at the center of the ultraviolet source 14 and relatively low at the edges. Therefore, if a plurality of ultraviolet sources 14 are arranged along the width direction of the carriage portion 10, uneven irradiation of ultraviolet UV can be reduced, and uneven sterilization can be reduced.
  • the installation location of the ultraviolet source 14 is not limited to the tip of the illustrated carriage portion 10.
  • a plurality of ultraviolet sources 14 may be arranged along the front-rear direction (X-axis) of the carriage portion 10.
  • FIG. 8 shows an example in which three ultraviolet sources 14 are arranged in a total of three places in front of the front wheel 11 and the front of the rear wheel 12 of the bogie portion 10, and further between the front wheel 11 and the rear wheel 12. ..
  • the bogie portion 10 normally travels (forwards) in front of the front wheels 11, it is sufficient if the ultraviolet source 14 is arranged at least in front of the front wheels 11 of the bogie portion 10. However, the bogie portion 10 may move backward. Therefore, if a plurality of ultraviolet sources 14 are arranged along the front-rear direction of the carriage portion 10, the floor surface 15 that cannot be sterilized only by the ultraviolet source 14 in front of the front wheels 11 of the carriage portion 10 can be sterilized.
  • FIGS. 7 and 8 may be combined and carried out. That is, a plurality of ultraviolet sources 14 may be arranged along the width direction of the carriage portion 10 and a plurality of ultraviolet sources 14 may be arranged along the front-rear direction of the carriage portion 10.
  • the irradiation of the ultraviolet UV to the ultraviolet source 14 was stopped, but the traveling of the trolley portion 10 was stopped.
  • the ultraviolet source 14 may be stopped from being irradiated with ultraviolet UV rays.
  • a switch for turning on and off the ultraviolet source 14 may be provided on the handle 35 or the operation console 88, and the irradiation of the ultraviolet UV may be started or stopped by the operation of the operator.
  • the ultraviolet source 14 may be provided in addition to the carriage portion 10. Further, ultraviolet UV may be applied to the shoes of the operator who operates the handle 35. Further, a reflector that reflects the ultraviolet UV toward the floor surface 15 may be provided at the place where the ultraviolet source 14 is installed.
  • the cover portion is not limited to the accommodation groove 61 exemplified above.
  • the storage box 110 shown in FIG. 9 or the storage hood 115 shown in FIG. 10 may be used as an example.
  • the ultraviolet source 14 is attached to the tip surface 10B of the carriage portion 10.
  • the ultraviolet source 14 is housed in the storage box 110.
  • the storage box 110 is attached to the tip surface 10B of the carriage portion 10 like the ultraviolet source 14.
  • the storage box 110 has a storage space that covers the upper side, the front side, and the side surface of the ultraviolet source 14, and an ultraviolet UV irradiation opening 111 is formed on the surface facing the floor surface 15.
  • the irradiation opening 111 has a rectangular shape, and similarly to the irradiation opening 60, it defines the irradiation range of the ultraviolet UV to the floor surface 15.
  • the storage box 110 is removable from the carriage portion 10. Therefore, the ultraviolet source 14 and the storage box 110 itself can be easily cleaned or replaced.
  • the ultraviolet source 14 is housed in the storage hood 115.
  • the accommodation hood 115 is attached to the tip surface 10B of the carriage portion 10 like the ultraviolet source 14.
  • the storage hood 115 has a storage space that covers the upper side, the front side, and the side of the ultraviolet source 14, and has a skirt shape in which a portion facing the floor surface 15 is open.
  • the accommodation hood 115 is removable from the carriage portion 10. Therefore, as in the case of the storage box 110, the ultraviolet source 14 and the storage hood 115 itself can be easily cleaned or replaced.
  • the materials of the storage box 110 and the storage hood 115 are not particularly limited as long as the ultraviolet source 14 (ultraviolet light emitting portion) is invisible from the outside. It may be wood, resin, metal, cloth, or the like. Further, the cover portion is not limited to the exemplary storage groove 61, the storage box 110, and the storage hood 115.
  • a camera 120 is attached to the lower center of the carriage portion 10.
  • the camera 120 captures the front floor surface 15.
  • the CPU of the control device of the second embodiment includes the specific units in addition to the respective units 75 to 80 of the first embodiment (only the ultraviolet source control unit 80 is shown in FIG. 12).
  • 125 is provided.
  • the camera 120 outputs the captured image CI of the front floor surface 15 to the specific unit 125 at a predetermined frame interval, for example, 10 fps (frame per second).
  • the specific unit 125 identifies the material of the floor surface 15 by analyzing the captured image CI.
  • the specifying unit 125 specifies the material of the floor surface 15 from the captured image CI by using a machine learning model such as a convolutional neural network that uses the captured image CI as input data and the material of the floor surface 15 as output data.
  • the specific unit 125 outputs the specific result SR of the material of the floor surface 15 to the ultraviolet source control unit 80.
  • the ultraviolet source control unit 80 changes the sterilizing ability of ultraviolet UV according to the specific result SR. Specifically, as shown in Table 130 of FIG. 13, when the material of the floor surface 15 is linoleum, the ultraviolet source control unit 80 converts the ultraviolet UV having a center wavelength of 222 nm to an intensity of 20 W / m 2 . And irradiate the ultraviolet source 14. On the other hand, when the material of the floor surface 15 is a carpet, the ultraviolet source control unit 80 irradiates the ultraviolet source 14 with ultraviolet UV having a center wavelength of 254 nm at an intensity of 30 W / m 2 .
  • the ultraviolet source 14 two units of an ultraviolet source 14 that irradiates an ultraviolet UV having a central wavelength of 222 nm and an ultraviolet source 14 that irradiates an ultraviolet UV having a central wavelength of 254 nm are prepared.
  • it may be one ultraviolet source 14 that irradiates the ultraviolet UV having a center wavelength of 222 nm and the ultraviolet UV having a center wavelength of 254 nm in a switchable manner.
  • the bactericidal ability of ultraviolet UV increases as the intensity of ultraviolet UV increases. Further, the ultraviolet UV having a central wavelength of 254 nm has a higher bactericidal ability than the ultraviolet UV having a central wavelength of 222 nm. Carpets have more irregularities than linoleum and are more susceptible to bacteria and / or viruses. Therefore, when the material of the floor surface 15 is a carpet, the captured bacteria and / or by irradiating with ultraviolet UV having a center wavelength of 254 nm, which has a relatively high bactericidal ability, at a relatively high intensity of 30 W / m 2 . Sterilizes the virus more strongly.
  • the ultraviolet source control unit 80 changes the sterilizing ability of ultraviolet UV, more specifically, the intensity and wavelength of ultraviolet UV, according to the material of the floor surface 15 specified by the specific unit 125. .. Therefore, sterilization can be performed with ultraviolet UV having a sterilizing ability suitable for the material of each floor surface 15.
  • ultraviolet UV having a sterilizing ability suitable for the material of each floor surface 15.
  • the intensity of the ultraviolet UV may be changed by changing the number of the ultraviolet sources 14 to be lit according to the material of the floor surface 15.
  • the material of the floor surface 15 is linoleum, it is provided in front of the front wheel 11 of the carriage portion 10. Only one UV source 14 is turned on.
  • the material of the floor surface 15 is a carpet, a total of three ultraviolet rays are arranged in front of the front wheel 11 and the front of the rear wheel 12 of the bogie portion 10, and further between the front wheel 11 and the rear wheel 12. All the sources 14 are turned on.
  • the sterilizing ability of ultraviolet UV is changed according to the traveling speed of the carriage portion 10.
  • the traveling speed of the bogie unit 10 is acquired by using a speedometer or the like that calculates the traveling speed from the number of rotations of the rear wheels 12 per unit time.
  • the ultraviolet source control unit 80 increases the intensity of ultraviolet UV as the traveling speed of the carriage unit 10 increases. Then, when the traveling speed of the carriage portion 10 reaches the maximum speed (8 km / h in FIG. 14), the intensity of the ultraviolet UV is set to the maximum intensity (30 W / m 2 in FIG. 14).
  • the intensity of ultraviolet UV may be changed according to a plurality of ranges in which the traveling speed of the bogie portion 10 is divided.
  • the intensity of ultraviolet UV rays corresponds to each range of 0 ⁇ V ⁇ 2, 2 ⁇ V ⁇ 4, 4 ⁇ V ⁇ 6, and 6 ⁇ V ⁇ 8.
  • the setting is such that the intensity of the ultraviolet UV is gradually increased as the traveling speed of the bogie portion 10 increases, such as 30 W / m 2 .
  • FIG. 16 shows an example in which the intensity and center wavelength of ultraviolet UV are changed according to the two ranges of 0 ⁇ V ⁇ 4 and 4 ⁇ V ⁇ 8. More specifically, as the traveling speed of the bogie portion 10 increases, 20 W / m 2 for the range of 0 ⁇ V ⁇ 4 and 30 W / m 2 for the range of 4 ⁇ V ⁇ 8, and so on. The setting is to gradually increase the intensity of ultraviolet UV rays.
  • the setting is to irradiate ultraviolet UV with a center wavelength of 222 nm, which has a relatively low sterilizing ability in the range of 0 ⁇ V ⁇ 4, and the center has a relatively high sterilizing ability in the range of 4 ⁇ V ⁇ 8. It is set to irradiate ultraviolet UV with a wavelength of 254 nm.
  • the ultraviolet source control unit 80 changes the sterilizing ability of the ultraviolet UV, more specifically, the intensity and / or the wavelength of the ultraviolet UV, according to the traveling speed of the trolley unit 10. Therefore, the sterilizing ability adapted to the traveling speed of the trolley unit 10, specifically, the sterilizing ability relatively strong when the traveling speed of the trolley unit 10 is relatively fast, and conversely, the traveling speed of the trolley unit 10 is relatively high. If it is slow, the floor surface 15 can be sterilized with a relatively weak sterilizing ability. When the traveling speed of the trolley portion 10 is relatively slow, the area of the floor surface 15 to which the ultraviolet UV is irradiated per unit time is also small. It is better to reduce the power consumption required for UV irradiation.
  • the number of the ultraviolet sources 14 to be lit is changed according to the traveling speed of the trolley unit 10. , The intensity of ultraviolet UV may be changed.
  • UV UV with a central wavelength of 222 nm has relatively little effect on the human body. Therefore, when irradiating ultraviolet UV with a center wavelength of 222 nm, ultraviolet UV may be irradiated in a range beyond the width W of the carriage portion 10.
  • the bogie unit 10 whose running is assisted by the rear wheel drive unit 13 is illustrated, but the present invention is not limited to this.
  • a bogie unit that is not assisted by a drive unit such as the rear wheel drive unit 13 may be used.
  • a sensor for detecting the rotation of the wheel is provided. Then, when the sensor detects the rotation of the wheel, the sensor outputs a running start signal to the ultraviolet source control unit 80, and when the sensor no longer detects the rotation of the wheel, the sensor outputs a running stop signal to the ultraviolet source control unit 80. do it.
  • the medical device may be the radioscopic fluoroscopy apparatus 150 shown in FIG.
  • the radiation fluoroscopy apparatus 150 performs fluoroscopy to continuously capture a plurality of radiographic images at predetermined frame intervals.
  • FIG. 17 shows a fluoroscopic image of the chest of a patient lying on the operating table 151 in the operating room.
  • the radiation fluoroscopic imaging device 150 is composed of a carriage portion 152, a main body portion 153, and an arm portion 154.
  • the bogie portion 152 has a front wheel 155, a rear wheel 156, and an ultraviolet source 14, and travels on the floor surface 15 by the front wheel 155 and the rear wheel 156.
  • the ultraviolet source 14 irradiates the floor surface 15 with ultraviolet UV.
  • the front wheels 155 and the rear wheels 156 are examples of "wheels" according to the techniques of the present disclosure.
  • a control device 160 is provided in the main body 153.
  • a battery, a voltage generator, and the like are also provided in the main body 153.
  • a console 161 is provided on the upper part of the main body portion 153.
  • the control device 160 and the console 161 have the same functions as the control device 40 and the console 41 of the first embodiment.
  • the control device 160 has an ultraviolet source control unit 80 that controls the operation of the ultraviolet source 14 as in the first embodiment.
  • the arm portion 154 has an arm 165 having a substantially C-shaped shape when viewed from the side.
  • the main body portion 153 has a support column 166 extending in the height direction.
  • the arm 165 and the support column 166 are connected via a connecting portion 167.
  • the connection portion 167 allows the arm 165 to move in the height direction with respect to the support column 166, and the height can be adjusted according to the position of the patient.
  • the arm 165 is rotatable around a rotation axis along the horizontal direction orthogonal to the height direction, penetrating the connecting portion 167.
  • a radiation source 168 is attached to one end of the arm 165, and an electronic cassette 30 is attached to the other end of the arm 165.
  • the electronic cassette 30 is housed in a holder 169 provided at the other end of the arm 165 so as to face the radiation source 168.
  • the electronic cassette 30 can also be used by removing it from the holder 169.
  • the radiation source 168 is located below the patient and the electronic cassette 30 is located above the patient.
  • Such a positional relationship is called an undertube posture.
  • the undertube posture the radiation from the radiation source 168 is partially shielded by the operating table 151, so that unnecessary exposure to the operator or the like existing around the patient can be reduced.
  • radiography may be performed in an overtube position in which the radiation source 168 is located above the patient and the electronic cassette 30 is located below the patient.
  • the radiation source 168 has a built-in radiation tube 170. Further, the radiation field limiting device 171 is attached to the radiation source 168.
  • the medical device is not limited to the mobile radiation generator 2 of the first embodiment, and may be any device as long as it has wheels and includes a trolley portion that runs on the floor surface.
  • it may be an ultrasonic diagnostic device in which an ultrasonic probe, a processor device, a display, and the like are integrally mounted on a cart.
  • the endoscope device may be an endoscope device in which an endoscope scope, a processor device, a light source device, a display, and the like are integrally mounted on a cart.
  • the ultraviolet source 14 may be continuously irradiated with ultraviolet UV, or may be irradiated with ultraviolet UV in a pulse shape.
  • the intensity of the second embodiment is changed by changing the duty ratio of the pulse.
  • the ultraviolet source 14 is exemplified as the ultraviolet light emitting portion, the present invention is not limited to this.
  • the ultraviolet light emitting unit may be an emission end of an optical fiber connected to the ultraviolet source 14, as in JP-A-09-253803.
  • the irradiation condition acquisition unit 75 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 traveling control unit 79, the ultraviolet source control unit 80, the shooting menu reception unit 100, and the irradiation condition setting.
  • the processing unit Processesing Unit
  • the image processing unit 102 the image acquisition unit 77
  • the image transfer unit 78 the traveling control unit 79
  • the ultraviolet source control unit 80 the shooting menu reception unit 100
  • the irradiation condition setting 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 traveling control unit 79, the ultraviolet source control unit 80, the shooting menu reception unit 100, and the irradiation condition setting.
  • the processing unit Processing Unit
  • the display control unit 103 the display control unit 103
  • the specific unit 125 the following various processors are used. be able to.
  • FPGA Field Programmable Gate Array
  • PLD programmable logic device
  • ASIC Application Specific Integrated Circuit
  • 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.
  • 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.
  • the processor functions as a plurality of processing units.
  • SoC System On Chip
  • SoC system On Chip
  • the various processing units are configured by using one or more of the above-mentioned various processors as a hardware-like structure.
  • an electric circuit 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. Further, the technique of the present disclosure extends to a storage medium for storing the program non-temporarily in addition to the program.
  • 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.

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Abstract

L'invention concerne un instrument médical comprenant : une partie de support qui a des roues et se déplace sur une surface de sol ; une partie d'émission de rayons ultraviolets qui irradie la surface de sol avec des rayons ultraviolets ; et une partie de recouvrement qui rend la partie d'émission de rayons ultraviolets invisible de l'extérieur.
PCT/JP2021/047063 2020-12-25 2021-12-20 Instrument médical WO2022138575A1 (fr)

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JP2020-217836 2020-12-25
JP2020217836 2020-12-25

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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01308514A (ja) * 1988-02-09 1989-12-13 Interlava Ag 吸引掃じ器
JPH0663108A (ja) * 1992-08-25 1994-03-08 Sani Clean Nagano:Kk 紫外線ランプ使用の室内や廊下等のフロアーの移動式殺菌消毒装置
JPH08280779A (ja) * 1995-04-19 1996-10-29 Yoshihisa Ishikawa 床面等の殺菌方法及びその装置
JPH09253083A (ja) * 1996-03-27 1997-09-30 Toshiba Corp 医用機器
JP2005046592A (ja) * 2003-07-29 2005-02-24 Samsung Kwangju Electronics Co Ltd 床殺菌機能を備えたロボット掃除機
US20120280147A1 (en) * 2011-05-03 2012-11-08 Douglas Ryan J Dynamic display and control of uv source for sanitization in mobile devices
WO2013129449A1 (fr) * 2012-02-29 2013-09-06 株式会社 日立メディコ Équipement à rayons x et équipement d'imagerie de diagnostic à rayons x
JP2015112439A (ja) * 2013-12-14 2015-06-22 倫文 木原 自動床面殺菌装置
US20180132966A1 (en) * 2016-11-11 2018-05-17 Stryker Corporation Autonomous Accessory Support For Transporting A Medical Accessory
JP2019103816A (ja) * 2017-12-08 2019-06-27 株式会社オーレック 殺菌装置
CN211864793U (zh) * 2020-03-31 2020-11-06 孙娜 一种医疗护理用辅助装置

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01308514A (ja) * 1988-02-09 1989-12-13 Interlava Ag 吸引掃じ器
JPH0663108A (ja) * 1992-08-25 1994-03-08 Sani Clean Nagano:Kk 紫外線ランプ使用の室内や廊下等のフロアーの移動式殺菌消毒装置
JPH08280779A (ja) * 1995-04-19 1996-10-29 Yoshihisa Ishikawa 床面等の殺菌方法及びその装置
JPH09253083A (ja) * 1996-03-27 1997-09-30 Toshiba Corp 医用機器
JP2005046592A (ja) * 2003-07-29 2005-02-24 Samsung Kwangju Electronics Co Ltd 床殺菌機能を備えたロボット掃除機
US20120280147A1 (en) * 2011-05-03 2012-11-08 Douglas Ryan J Dynamic display and control of uv source for sanitization in mobile devices
WO2013129449A1 (fr) * 2012-02-29 2013-09-06 株式会社 日立メディコ Équipement à rayons x et équipement d'imagerie de diagnostic à rayons x
JP2015112439A (ja) * 2013-12-14 2015-06-22 倫文 木原 自動床面殺菌装置
US20180132966A1 (en) * 2016-11-11 2018-05-17 Stryker Corporation Autonomous Accessory Support For Transporting A Medical Accessory
JP2019103816A (ja) * 2017-12-08 2019-06-27 株式会社オーレック 殺菌装置
CN211864793U (zh) * 2020-03-31 2020-11-06 孙娜 一种医疗护理用辅助装置

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