JP7020059B2 - Radiation imaging system - Google Patents

Description

The present invention relates to a radiographic imaging system.

Conventionally, a hand switch has been used for radiation exposure operations in a general imaging device that instantaneously irradiates a subject with radiation to capture a still image. For example, in Patent Document 1, by mounting a plurality of exposure operation switches on a round-trip vehicle, the operability of the exposure operation switches under various situations in a hospital room is improved.
Further, in recent years, with the development of a radiation imaging device (Flat Panel Detector: FPD), a fluoroscopy device that continuously irradiates a subject with radiation to shoot a moving image is being developed (for example, a patent). See Reference 2.). In such a perspective imaging device, a still image imaging mode and a continuous imaging mode (that is, a moving image imaging mode) are distinguished, and the mode is selected and switched by the operator during imaging.

Japanese Unexamined Patent Publication No. 2011-083649 Japanese Unexamined Patent Publication No. 2017-131310

However, when there are a plurality of exposure operation switches as in Patent Document 1, the exposure operation is performed by unintended contact between the patient or the operator who is the subject, and there is a possibility of erroneous exposure.
Further, in a fluoroscopic imaging device such as Patent Document 2, it is necessary for the operator to keep pressing the hand switch, which is a burden on the operator. Further, in such a fluoroscopic imaging device, the operator selects switching of the imaging mode, but in that case, the imaging cycle in each imaging mode is shortened, and the frequency of mode switching work increases, which is complicated. , There is concern about erroneous explosion due to erroneous operation.

An object of the present invention is to prevent erroneous exposure due to an unintended operation and to improve the workability of the operator.

In order to solve the above problems, the invention according to claim 1 comprises an irradiation means for irradiating a subject with radiation and a radiation irradiation means.
In a radiation imaging system including a plurality of exposure operating means configured to be able to operate the radiation irradiation means.
The plurality of exposure operating means are configured so that predetermined functions can be assigned, and the predetermined functions include at least functions related to the operation of the radiation irradiation means.
Further, a function assigning means for automatically assigning the predetermined function according to an imaging condition or a device state is further provided for each of the plurality of exposure operating means.
The imaging condition is the scheduled irradiation time of the radiation emitted by the irradiation means.
The plurality of exposure operation means are configured to perform the exposure operation in different modes.
The plurality of exposure operating means include a hand type operated by the operator's hand and a foot type operated by the operator's foot.
The function assigning means automatically assigns the predetermined function according to the shooting conditions.
Of the plurality of exposure operation means, one exposure operation means to which the function related to the operation of the radiation irradiation means is assigned is activated, and the remaining exposure operation means to which the function is not assigned is inactive. Control to be in a state,
In the case of still image shooting, the hand-type exposure operation means is activated.
In the case of moving image shooting, the foot-type exposure operating means is controlled to be in an active state .
Further, the invention according to claim 2 comprises an irradiation means for irradiating a subject with radiation and a radiation irradiation means.
In a radiation imaging system including a plurality of exposure operating means configured to be able to operate the radiation irradiation means.
The plurality of exposure operating means are configured so that predetermined functions can be assigned, and the predetermined functions include at least functions related to the operation of the radiation irradiation means.
Further, a function assigning means for automatically assigning the predetermined function according to an imaging condition or a device state is further provided for each of the plurality of exposure operating means.
The function assigning means automatically assigns the predetermined function according to the state of the apparatus, and has a plurality of holding portions in which each of the plurality of exposure operating means is detachably held.
The holding portion is configured to be able to recognize the detachable state of the exposure operating means.
The device state is characterized in that the exposure operating means in the holding portion is in a detachable state.
Further, the invention according to claim 3 is a radiation image including a radiation irradiation means for irradiating a subject with radiation and a plurality of exposure operation means configured to be able to operate the radiation irradiation means. In the shooting system
The plurality of exposure operating means are configured so that predetermined functions can be assigned, and the predetermined functions include at least functions related to the operation of the radiation irradiation means.
Further, a function assigning means for automatically assigning the predetermined function according to an imaging condition or a device state is further provided for each of the plurality of exposure operating means.
The subject is a patient
The predetermined function assigned to the plurality of exposure operation means includes a pain notification function for notifying that there is pain by operating the exposure operation means when the patient himself feels pain. It is characterized by being .

According to the present invention, it is possible to prevent erroneous exposure due to an unintended operation and improve the workability of the operator.

It is a figure explaining the schematic structure of the radiation imaging system in 1st Embodiment, and the mode of imaging by the radiation imaging system. In the first embodiment, it is a flowchart which shows the control flow at the time of performing a function assignment to a plurality of exposure operation means. It is a figure explaining the mode of the imaging by the radiation imaging system in the 2nd Embodiment. In the second embodiment, it is a flowchart which shows the control flow at the time of performing a function assignment to a plurality of exposure operation means. It is a figure explaining the mode of the imaging by the radiation imaging system in the 3rd Embodiment. In the third embodiment, it is a flowchart which shows the control flow at the time of assigning a function to a plurality of exposure operation means. In the first modification, it is a flowchart which shows the control flow at the time of assigning a function to a plurality of exposure operation means. It is a figure explaining the mode of the imaging by the radiation imaging system in the modification 2.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, although the embodiments described below are provided with various technically preferable limitations for carrying out the present invention, the technical scope of the present invention is not limited to the following embodiments and illustrated examples. do not have.

[First Embodiment]
As shown in FIG. 1, the radiation image photographing system 40 of the present embodiment is capable of taking still images and moving images, and further goes to a patient (subject) P who has difficulty in moving to emit radiation. It is a system for rounds to take images. Specifically, the main body 41 is provided with wheels 42 and is configured as a movable round-trip vehicle. Hereinafter, the main body 41 will be referred to as a round-trip car 41. That is, the radiographic imaging system 40 in the present embodiment is a mobile radiographic imaging system.
The radiographic imaging system 40 of the present embodiment can also be applied to, for example, an imaging room or an operating room (operating table) of a hospital.

The radiation imaging system 40 of the present embodiment includes a round-trip car 41 which is a main body, one or more radiation imaging devices (Flat Panel Detector, hereinafter FPD) 1, an imaging control unit (not shown), a radiation irradiation device 43, and the like. It is configured to include a console 44 and the like.
Further, the radiographic imaging system 40 can be connected to a radiological information system (RIS), a picture archiving and communication system (PACS), etc. (not shown) by wire or wirelessly. It has become.

Although not shown in the FPD1, pixels equipped with a radiation detection element that generates an electric charge according to a dose and a switch element that accumulates and emits an electric charge by receiving radiation are arranged in a two-dimensional shape (matrix shape). A read circuit that reads out the amount of charge emitted from each pixel as a signal value, a control unit that generates image data from multiple signal values read by the read circuit, and wired or wireless transmission of image data and various signals. It is equipped with a communication unit for transmitting to the round-trip vehicle 41, a connector for inserting a cable connected to the round-trip vehicle 41, and the like.

The FPD1 has a built-in scintillator or the like, and the irradiated radiation is converted into light of another wavelength such as visible light by the scintillator, and a charge corresponding to the converted light is generated (so-called indirect type). Alternatively, it may be a type that directly generates a charge from radiation without using a scintillator or the like (so-called direct type).
Further, the FPD 1 is connected to the round-trip vehicle 41 by a communication cable, and is configured to perform wired communication with the round-trip vehicle 41. Specifically, the FPD 1 receives various control signals from the round-trip vehicle 41 via a communication cable, and transmits the generated image data to the round-trip vehicle 41.

Further, an FPD storage unit 45 capable of storing the FPD 1 is provided at the rear of the round-trip vehicle 41. When the round-trip vehicle 41 is transported to the hospital room, the FPD 1 can be transported in a state of being stored in the FPD storage unit 45, so that the user U can save the trouble of carrying the FPD 1 or the like by hand.

The photographing control unit is housed in the housing of the round-trip vehicle 41, and is composed of a CPU (Central Processing Unit), a RAM (Random Access Memory), a storage unit, and the like (not shown).
The CPU of the photographing control unit reads out the system program and various processing programs stored in the storage unit, expands them in the RAM, and controls the operation of each unit of the round-trip vehicle 41 according to the expanded program. Further, the storage unit of the shooting control unit stores various programs executed by the shooting control unit and parameters necessary for executing the processing by the program. In addition, it is possible to store data such as processing results.
The imaging control unit is appropriately linked with the control of the radiation irradiation device 43 and the control of the console 44.
Then, such an imaging control unit constitutes a function assignment means for assigning a predetermined function to each of the plurality of exposure operation switches SW1 and SW2, which will be described later.

The radiation irradiation device 43 includes a synchronization signal output unit (not shown), a generator (not shown), a plurality of exposure operation switches SW1 and SW2, a radiation source (not shown), and the like.

The synchronization signal output unit outputs a pulsed synchronization signal to the generator and the FPD1 based on the operation of the plurality of exposure operation switches SW1 and SW2. In still image shooting, the synchronization signal is transmitted only once per shooting, and in moving image shooting, the synchronization signal of the same cycle is repeatedly transmitted multiple times per shooting.

The generator applies a voltage corresponding to preset irradiation conditions (tube voltage, tube current, irradiation time (mAs value), etc.) to the radiation source each time a synchronization signal is input from the synchronization signal output unit. Is configured to be possible.

The radiation source (tube) has a rotating anode, a filament, and the like. Then, when a voltage is applied from the generator, the filament irradiates the rotating anode with an electron beam corresponding to the voltage, and the rotating anode generates a dose of radiation corresponding to the intensity of the electron beam.
In addition, the radiation source is rotated by a rotation axis that extends in the horizontal direction, and the radiation irradiation port is oriented horizontally (when shooting in a standing position) or vertically downward (shooting in a lying position). It is possible to switch to the state of doing).

The console 44 is composed of a computer, a dedicated device, and the like, and includes a control unit, a storage unit, and the like (not shown), as well as a display unit, an operation unit, and the like.
Then, the console 44 can set various imaging conditions (irradiation conditions, conditions related to the subject such as the physique of the patient P, the imaging site, the imaging direction, etc.) based on the operation of the operation unit. It has become.
Further, the console 44 can perform predetermined image processing on the image data received from the FPD 1 to generate preview image data and diagnostic image data, and display an image based on this data on the display unit. There is.

Subsequently, a plurality of exposure operation switches SW1 and SW2 will be described in detail.
These plurality of exposure operation switches SW1 and SW2 are configured to be able to operate the radiation irradiation device 43, and are connected to the round-trip car 41 by wire. The exposure operation switches SW1 and SW2 may be remotely controlled by being wirelessly connected to the round-trip vehicle 41.

Further, the plurality of exposure operation switches SW1 and SW2 are configured to perform the exposure operation in different modes.
That is, one of the exposure operation switches SW1 is a hand type operated by the user U, and is used when taking a still image in the present embodiment. The other exposure operation switch SW2 is a foot type operated by the foot of the user U, and is used when shooting a moving image in the present embodiment.
This is due to the operation time of still image shooting and moving image shooting. In the case of still image shooting, the operation is instantaneous, whereas in the case of moving image shooting, continuous operation is required. For continuous operation, for example, like the accelerator of a car, it is said that the input by the foot is better than the input by the hand. Therefore, as described above, the exposure operation switch SW1 for still image shooting is a hand type, and the exposure operation switch SW2 for moving image shooting is a foot type.
However, the present invention is not limited to such a form, and for example, either switch SW1 or SW2 may be a hand type, or both may be a foot type. Further, the number of switches does not have to be two, and three or more switches may be used.

The plurality of exposure operation switches SW1 and SW2 are configured so that predetermined functions can be assigned. That is, since the plurality of exposure operation switches SW1 and SW2 are switches, they are basically provided to turn on or off some operation in the radiation irradiation device 43. Therefore, the predetermined functions assigned to the plurality of exposure operation switches SW1 and SW2 include at least the functions related to the operation of the radiation irradiation device 43.

Further, in order to assign a predetermined function to such a plurality of exposure operation switches SW1 and SW2, the radiation imaging system 40 in the present embodiment has a radiation imaging system 40 for each of the plurality of exposure operation switches SW1 and SW2. It is equipped with a function assigning means that automatically assigns a predetermined function according to a shooting condition or a device state.
It is assumed that the function assignment means controls the operation of the plurality of exposure operation switches SW1 and SW2 by the cooperation between the shooting control unit and the function assignment program stored in the storage unit.
The function assignment means in the present embodiment automatically assigns predetermined functions to the plurality of exposure operation switches SW1 and SW2 according to the imaging conditions among the imaging conditions or the device states.
Here, the imaging condition refers to the scheduled irradiation time of the radiation irradiated by the radiation irradiation device 43. That is, the functions are assigned to the plurality of exposure operation switches SW1 and SW2 depending on whether the still image shooting with a short radiation irradiation time or the moving image shooting with a long radiation irradiation time is performed.

Further, the radiation imaging system 40 in the present embodiment further includes a notification means for notifying a predetermined function assigned to the plurality of exposure operation switches SW1 and SW2.
The notification means in the present embodiment is composed of a console 44, and the display unit of the console 44 can display predetermined functions assigned to each of the plurality of exposure operation switches SW1 and SW2. ..
However, the present invention is not limited to this, and the notification may be performed by voice, or may be notified by other visual expressions such as lighting / blinking of an LED.

An imaging table 50 is provided so as to face such a radiation imaging system 40. In the present embodiment, a standing image pickup table is adopted for the patient P to take an image in a standing position.
The photographing table 50 includes an FPD holding unit 51 that holds the FPD 1. The height position of the FPD holding portion 51 can be adjusted along the support column according to the imaging site of the patient P.

When the radiographic image of the patient P is taken by the radiographic image taking system 40 having the above configuration, the user U, who is the operator, takes a picture according to the taking order. The shooting order is instruction information (shooting order) about the shooting content transmitted from the above-mentioned RIS (not shown), and is stored in, for example, a storage unit of the console 44.
If the shooting order is confirmed, it can be determined whether to shoot a still image or to shoot a moving image as a shooting condition, and the user U starts shooting accordingly.
The user U first selects the shooting conditions according to the shooting order, as shown in FIG. 2 (step S1).
When still image shooting is selected, the exposure operation function is assigned to the hand-type exposure operation switch SW1 among the plurality of exposure operation switches SW1 and SW2 to activate the foot-type exposure operation. The switch SW2 becomes inactive (step S2). Then, a still image can be taken.
On the other hand, when moving image shooting is selected, the exposure operation function is assigned to the foot type exposure operation switch SW2 among the plurality of exposure operation switches SW1 and SW2 to activate the hand type exposure. The operation switch SW1 becomes inactive (step S3). Then, it is possible to shoot a moving image.

The radiation irradiation operation switch in the inactive state cannot be operated by anyone, not only the user U, of the radiation irradiation device 43.
In other words, the function assigning means assigns the function of "inactive" to the exposure operation switch of the person who does not shoot a still image or a moving image.
That is, in the present embodiment, the functions related to the operation of the radiation irradiation device 43 assigned to the plurality of exposure operation switches SW1 and SW2 are the function of starting the irradiation of radiation by the radiation irradiation device 43 and the function of starting the irradiation of radiation. It refers to the function that makes it inactive without doing so.

In the present embodiment, the user U selects the shooting conditions in this way, but the present invention is not limited to this, and for example, the control unit of the console 44 is based on the instruction information of the shooting order. The shooting conditions may be selected.

As described above, according to the present embodiment, the plurality of exposure operation switches SW1 and SW2 are configured so that predetermined functions can be assigned, and the predetermined functions are at least related to the operation of the radiation irradiation device 43. The function is included, and the radiation imaging system 40 further includes a function assignment means for automatically assigning a predetermined function to each of the plurality of exposure operation switches SW1 and SW2 according to the imaging condition or the device state. The exposure operation switch that is not used depending on the imaging conditions can be in an inactive state so as not to start the irradiation of radiation by the radiation irradiation device 43. As a result, it is possible to prevent erroneous exposure due to an unintended operation by the user U, the patient P, or the like, and improve the workability of the user U who is the operator.

Further, in the present embodiment, the function assigning means automatically assigns a predetermined function according to the imaging condition, and the imaging condition is the scheduled irradiation time of the radiation irradiated by the irradiation device 43. If the scheduled radiation irradiation time is short, it is determined that a still image is being taken, and a function for operating the radiation irradiation device 43 can be assigned to the hand-type exposure operation switch SW1 so that the scheduled radiation irradiation time can be assigned. If it is long, it is determined that the image is taken as a moving image, and a function for operating the radiation irradiation device 43 can be assigned to the foot type exposure operation switch SW2.

Further, since the plurality of exposure operation switches SW1 and SW2 are configured to perform the exposure operation in different modes, the form is preferable for taking a still image or the form for taking a moving image. It is possible to reduce the burden on the user U who is the operator.
Since the plurality of exposure operation switches SW1 and SW2 include a hand type operated by the user U's hand and a foot type operated by the user U's foot, the user U can easily operate the switch. Therefore, the workability of the user U can be improved.

Further, since the radiation imaging system 40 further includes a notification means for notifying a predetermined function assigned to the plurality of exposure operation switches SW1 and SW2, if the user U confirms the notification content, the operation by the user U can be performed. It is possible to prevent misidentification and prevent accidental exposure due to unintended operation.

Further, since the radiation imaging system 40 as described above is a mobile radiation imaging system using the round-trip car 41, the round-trip car 41 is moved into the hospital room to take a radio-imaging image of the patient P in the hospital room. be able to.
The hospital room may be a shared room, some people may come to visit the patient P, or the surrounding environment may not be known in advance. In such a case, unintended operations are likely to occur in the plurality of exposure operation switches SW1 and SW2. Therefore, if the radiographic imaging system 40 of the present embodiment is applied to the round-trip vehicle 41, it becomes easy to prevent erroneous exposure due to an unintended operation.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to the drawings. For convenience of explanation, only the components different from the above-described first embodiment will be described.

In the present embodiment, when the patient P himself feels pain, the exposure operation switch SW1 is operated to notify the predetermined functions assigned to the plurality of exposure operation switches SW1 and SW2 that the pain has occurred. Includes a pain notification function.
That is, in recent radiographic imaging systems, the imaging time can be lengthened to the extent that moving images can be captured, so that the moment when the patient P feels pain can be continuously captured. For example, in the field of orthopedics, when a patient feels pain in imaging a joint, the patient P can press the switch, and the timing of pressing the switch and the captured image (moving image) can be linked to improve the diagnostic value.

More specifically, the function assigning means in the present embodiment is configured to automatically assign a predetermined function to the plurality of exposure operation switches SW1 and SW2 according to the shooting conditions among the shooting conditions or the device states. Has been done.
That is, as in the first embodiment, the plurality of exposure operation switches SW1 and SW2 are subjected to depending on whether the still image shooting with a short radiation irradiation time or the moving image shooting with a long radiation irradiation time is performed. And assign functions.

In the case of still image shooting in which the irradiation time of radiation is short, it is difficult to shoot the moment when the pain occurs and it is not necessary to notify the pain. Therefore, as shown in FIG. 3A, the user U is exposed. Hold the shooting operation switch SW1 to shoot still images.
On the other hand, in the case of moving image shooting in which the irradiation time of radiation is long, the pain notification function is assigned. In the case of movie shooting, since the exposure operation function is assigned to the foot type exposure operation switch SW2, the pain notification function is assigned to the hand type exposure operation switch SW1 and is shown in FIG. 3 (b). As shown, imaging is performed with the patient P holding the switch SW1.
When the patient P has a pain during the moving image shooting, he / she presses the switch SW1 to notify that the pain has occurred. This pain notification may be notified to the user U through the notification means. In addition, it is assumed that this pain notification can be confirmed on the recorded video data.

Even when the radiographic image capturing system 40 of the present embodiment captures the radiographic image of the patient P, the user U, who is the operator, performs the imaging according to the imaging order.
If the shooting order is confirmed, it can be determined whether to shoot a still image or to shoot a moving image as a shooting condition, and the user U starts shooting accordingly.
The user U first selects the shooting conditions according to the shooting order, as shown in FIG. 4 (step S11).
When still image shooting is selected, the exposure operation function is assigned to the hand-type exposure operation switch SW1 among the plurality of exposure operation switches SW1 and SW2 to activate the foot-type exposure operation. The switch SW2 becomes inactive (step S12). Then, a still image can be taken.
On the other hand, when moving image shooting is selected, the exposure operation function is assigned to the foot type exposure operation switch SW2 among the plurality of exposure operation switches SW1 and SW2 to activate the hand type exposure. A pain notification function is assigned to the operation switch SW1 (step S13). Then, it is possible to shoot a moving image.

As described above, according to the present embodiment, it is possible to prevent erroneous exposure due to an unintended operation by the user U, the patient P, or the like, and to improve the workability of the user U who is the operator.
Moreover, a pain notification function for notifying that there is pain by operating the exposure operation switch SW1 when the patient P himself feels pain in a predetermined function assigned to a plurality of exposure operation switches SW1 and SW2. By pressing the switch on the patient P himself when the patient P feels pain during movie shooting, the state of the imaged part at the time of the pain notification and the state of the imaged part before and after the pain notification are included. Can be confirmed in the captured image (movie), which helps the doctor to make an accurate diagnosis.

[Third Embodiment]
Next, a third embodiment of the present invention will be described with reference to the drawings. For convenience of explanation, only the components different from the above-mentioned first or second embodiment will be described.

The function assigning means in the present embodiment is configured to automatically assign a predetermined function to the plurality of exposure operation switches SW1 and SW2 according to the device state among the shooting conditions or the device state.
Here, the device state refers to a case where a state change appears in the external configuration, not in the internal configuration of the radiation imaging system 40. In other words, it refers to the movement of the external configuration such that the function assigning means gives a "trigger" for assigning a predetermined function to the plurality of exposure operation switches SW1 and SW2.
The external configuration referred to here refers to a portion that can be seen from the outside, such as the exposure operation switches SW1 and SW2, the collimator 43a of the radiation irradiation device 43, and the like.
In the present embodiment, when a change is confirmed in the states of the plurality of exposure operation switches SW1 and SW2, a predetermined function is automatically assigned to the plurality of exposure operation switches SW1 and SW2.

Here, the round-trip vehicle 41 is provided with a plurality of holding portions 46, 47 in which the plurality of exposure operation switches SW1 and SW2 are detachably held.
As shown in FIG. 5, the holding portion 46 is provided on the side surface of the housing of the round-trip vehicle 41 so as to be able to hold the hand-type exposure operation switch SW1.
Further, the holding portion 46 is configured to be able to recognize the detached state of the hand-type exposure operation switch SW1 by providing a sensor at a contact portion with the hand-type exposure operation switch SW1.
As shown in FIG. 5, the holding portion 47 is provided inside the housing of the round-trip vehicle 41, and is adapted to accommodate the foot-type exposure operation switch SW2.
Further, the holding portion 47 is configured to be able to recognize the detached state of the foot type exposure operation switch SW2 by providing a sensor at the contact portion with the foot type exposure operation switch SW2.

Even when the radiographic image capturing system 40 of the present embodiment captures the radiographic image of the patient P, the user U, who is the operator, performs the imaging according to the imaging order.
By confirming the shooting order, the user U can determine whether to shoot a still image or to shoot a moving image. Therefore, the user U can determine which of the plurality of exposure operation switches SW1 and SW2 according to the shooting order. Remove one of them from the holding portions 46 and 47.

More specifically, when the shooting order is to shoot a still image, the hand-type exposure operation switch SW1 is removed from the holding portion 46 in step S21. By doing so, it is detected that the hand-held exposure operation switch SW1 has been removed from the holding portion 46.
As a result, the exposure operation function is assigned to the hand-type exposure operation switch SW1 to be in the active state, and the foot-type exposure operation switch SW2 is in the inactive state (step S22). Then, a still image can be taken.

If the shooting order is to shoot a moving image, the foot-type exposure operation switch SW2 is used in step S23 without removing the hand-type exposure operation switch SW1 from the holding unit 46 in step S21. Is removed from the holding portion 47. By doing so, it is detected that the foot-type exposure operation switch SW2 has been removed from the holding portion 47.
As a result, the exposure operation function is assigned to the foot-type exposure operation switch SW2 to be in the active state, and the hand-type exposure operation switch SW1 is in the inactive state (step S24). Then, it is possible to shoot a moving image.
If the foot-type exposure operation switch SW2 is not removed from the holding portion 47 in step S23, the process returns to step S21.

In the present embodiment, the function assignment is performed by the function assignment means when the exposure operation switches SW1 and SW2 are removed from the holding portions 46 and 47, but the present embodiment is not limited to this. do not have. For example, when the exposure operation switches SW1 and SW2 are switches that require two-step pressing, the function may be assigned when the first-step switch is pressed.

As described above, according to the present embodiment, it is possible to prevent erroneous exposure due to an unintended operation by the user U, the patient P, or the like, and to improve the workability of the user U who is the operator.
Moreover, in the present embodiment, the function assigning means automatically assigns a predetermined function according to the device state, and the device state is the detached state of the exposure operation switches SW1 and SW2 in the holding units 46 and 47. Therefore, if one of the exposure operation switch SW1 is removed from the holding unit 46, it is determined that still image shooting is performed, and a function for operating the radiation irradiation device 43 can be assigned to the exposure operation switch SW1. When the exposure operation switch SW2 is removed from the holding unit 47, it is determined that moving image is being taken, and a function for operating the radiation irradiation device 43 can be assigned to the exposure operation switch SW2.

[Modification example]
The embodiment to which the present invention is applicable is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention. Hereinafter, a modified example will be described. The following modifications may be combined as much as possible.

[Modification 1]
In this modification, as shown in FIG. 7, either the hand-type exposure operation switch SW1 or the foot-type exposure operation switch SW2 may be removed from the holding portions 46 and 47 first.
The selection at each step in this modification includes both conscious selection and unconscious selection.

In step S31, the user U selects whether or not to remove the hand-type exposure operation switch SW1 from the holding unit 46.
If it is selected to be removed, it is detected, and the exposure operation function is assigned to the hand-type exposure operation switch SW1 to be in the active state. The foot-type exposure operation switch SW2 is inactive at this point (step S32).

Subsequently, in step S33, the user U selects whether or not to take out the foot-type exposure operation switch SW2 from the holding unit 47.
If it is selected to be taken out, it is detected, and the exposure operation function is assigned to the foot type exposure operation switch SW2 to be in the active state. That is, both the hand-type exposure operation switch SW1 and the foot-type exposure operation switch SW2 are assigned the exposure operation function and become active (step S34).
If the user U selects not to take out the foot-type exposure operation switch SW2 from the holding unit 47 in step S33, the activation of only the hand-type exposure operation switch SW1 will be continued. (Step S35).

If the user U chooses not to remove the hand-type exposure operation switch SW1 from the holding unit 46 in step S31, whether or not to take out the foot-type exposure operation switch SW2 from the holding unit 47 in step S36. Select.
If it is selected not to be taken out, the process returns to step S31.
If it is selected to be taken out, it is detected, and the exposure operation function is assigned to the foot type exposure operation switch SW2 to be in the active state (step S37).

Subsequently, in step S38, the user U selects whether or not to take out the hand-type exposure operation switch SW1 from the holding unit 46.
If it is selected to be taken out, it is detected, and the exposure operation function is assigned to the hand-type exposure operation switch SW1 to be in the active state. That is, both the hand-type exposure operation switch SW1 and the foot-type exposure operation switch SW2 are assigned the exposure operation function and become active (step S39).
If the user U selects not to take out the hand-type exposure operation switch SW1 from the holding unit 46 in step S38, the activation of only the foot-type exposure operation switch SW2 is continued. (Step S40).

In this modification, the waiting time between each step shall be set as appropriate.
Further, for example, in steps S33 and S38, when the irradiation of radiation by the radiation irradiating device 43 is started before the selection is completed (for example, between steps S32 and S33, and between steps S37 and S38). When the shooting operation is started), the switch that has not been detected may be forcibly inactive as it is, or the function may be assigned.

According to such a modification, which of the plurality of exposure operation switches SW1 and SW2 may be taken out from the holding portions 46 and 47 first. That is, for example, when both still image shooting and movie shooting are performed according to the shooting order, or when one or both of still image shooting and movie shooting are performed regardless of the shooting order, a hand-type exposure operation switch is used. This is possible when the foot-type exposure operation switch SW2 is taken out from the holding portion 47 before the SW1 is picked up. Therefore, it can contribute to improving the workability of the user U.

[Modification 2]
In this modification, as shown in FIG. 8, a recumbent type (bed type) imaging table 60 is adopted for the patient P to take an image in the recumbent position.
When taking a picture using the photographing table 60, the FPD 1 may be placed between the photographing table 60 and the patient P, or the photographing table 60 may be provided with an FPD holding portion.
By using the recumbent-type imaging table 60 in this way, it is possible to take an image of the patient P who cannot stand up, which is preferable.
Further, when the radiographic imaging system 40 is applied to the operating table, the recumbent type imaging table 60 is also used. In this case, the FPD holding portion is provided for the photographing table 60.

U user (operator)
P patient (subject)
SW1 Exposure operation switch SW2 Exposure operation switch 1 Radiation imaging device (FPD)
40 Mobile radiation imaging system 41 Round-trip car 42 Wheels 43 Radiation irradiation device 43a Collimator 44 Console 45 FPD storage 46 Holding 47 Holding 50 Shooting table 51 FPD holding 60 Shooting table

Claims (5)

Irradiation means for irradiating the subject with radiation,
In a radiation imaging system including a plurality of exposure operating means configured to be able to operate the radiation irradiation means.
The plurality of exposure operating means are configured so that predetermined functions can be assigned, and the predetermined functions include at least a function related to the operation of the radiation irradiation means.
Further, a function assigning means for automatically assigning the predetermined function according to an imaging condition or a device state is further provided for each of the plurality of exposure operating means.
The imaging condition is the scheduled irradiation time of the radiation emitted by the irradiation means.
The plurality of exposure operation means are configured to perform the exposure operation in different modes.
The plurality of exposure operating means include a hand type operated by the operator's hand and a foot type operated by the operator's foot.
The function assigning means automatically assigns the predetermined function according to the shooting conditions.
Of the plurality of exposure operation means, one exposure operation means to which the function related to the operation of the radiation irradiation means is assigned is activated, and the remaining exposure operation means to which the function is not assigned is inactive. Control to be in a state,
In the case of still image shooting, the hand-type exposure operation means is activated.
A radiation imaging system characterized in that the foot-type exposure operating means is controlled to be in an active state in the case of moving image shooting. Irradiation means for irradiating the subject with radiation,
In a radiation imaging system including a plurality of exposure operating means configured to be able to operate the radiation irradiation means.
The plurality of exposure operating means are configured so that predetermined functions can be assigned, and the predetermined functions include at least functions related to the operation of the radiation irradiation means.
Further, a function assigning means for automatically assigning the predetermined function according to an imaging condition or a device state is further provided for each of the plurality of exposure operating means.
The function assigning means automatically assigns the predetermined function according to the state of the apparatus, and has a plurality of holding portions in which each of the plurality of exposure operating means is detachably held.
The holding portion is configured to be able to recognize the detachable state of the exposure operating means.
The device state is a radiation imaging system characterized in that the exposure operating means in the holding portion is attached / detached. Irradiation means for irradiating the subject with radiation,
In a radiation imaging system including a plurality of exposure operating means configured to be able to operate the radiation irradiation means.
The plurality of exposure operating means are configured so that predetermined functions can be assigned, and the predetermined functions include at least functions related to the operation of the radiation irradiation means.
Further, a function assigning means for automatically assigning the predetermined function according to an imaging condition or a device state is further provided for each of the plurality of exposure operating means.
The subject is a patient
The predetermined function assigned to the plurality of exposure operation means includes a pain notification function for notifying that there is pain by operating the exposure operation means when the patient himself feels pain. A radiation imaging system characterized by being The radiographic imaging system according to any one of claims 1 to 3 , further comprising a notifying means for notifying the predetermined function assigned to the plurality of exposure operating means. The radiation imaging system according to any one of claims 1 to 4 , wherein at least the radiation irradiation means and the plurality of exposure operation means are mounted on the round-trip vehicle.

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