JP2018099444A - MOBILE TYPE X-ray IMAGING DEVICE - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an occurrence of an unexpected situation attributed to a careless operation of wireless connection equipment while eliminating the need for management of a key and memorization of a password.SOLUTION: A mobile type X-ray imaging device includes: first acceptance means for accepting input of a start instruction including user authentication information without an input operation of the authentication information by the user; first authentication means for executing user authentication by collating the authentication information in the start instruction with reference information in the first storage means; start-up means for starting up a device body when the user authentication is successful; first reception means for receiving a pairing instruction including equipment identification information from wireless connection equipment that has executed the user authentication; and pairing executing means for writing the equipment identification information in the pairing instruction in second storage means.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a mobile X-ray imaging apparatus.

  2. Description of the Related Art Conventionally, a mobile X-ray imaging apparatus such as a mobile round-trip X-ray apparatus is activated by a physical key operation or a password input by a user, and moves to a subject according to the user operation. For example, the user operates a hand switch capable of wireless communication after arranging a portable X-ray detector capable of wireless communication between the subject and the bed.

  The mobile X-ray imaging apparatus emits X-rays based on a radio signal from a hand switch. The X-ray detector detects X-rays that have passed through the subject, and outputs the detection result to the mobile X-ray imaging apparatus wirelessly. The mobile X-ray imaging apparatus generates and stores an X-ray image of the subject based on the output of the X-ray detector.

JP2015-058341A

  The mobile X-ray imaging apparatus as described above usually has no particular problem, but according to the study of the present inventor, there is room for improvement in the following points. For example, in the activation method described above, an unauthorized third party can activate and move the apparatus main body due to key theft or password leakage, and X-rays can be irradiated using a hand switch. Further, from the viewpoint of preventing key theft and password leakage, it is necessary to strictly manage the key and to store a long and complicated password. When biometric authentication is used for activation, key management and password storage are not required.

  However, even in this case, since a wireless connection device such as a hand switch or an X-ray detector is used, the device connected to the mobile X-ray imaging apparatus is unknown until X-ray imaging. For this reason, for example, unexpected operation may be caused by carelessly operating the wireless connection device. Specifically, the X-ray may be erroneously irradiated by carelessly operating the connected hand switch. Alternatively, there is a possibility that unnecessary exposure corresponding to the first irradiation may be caused by inadvertently placing an unconnected X-ray detector, irradiating X-rays, and then performing X-ray imaging again.

  An object of the present invention is to provide a mobile X-ray imaging apparatus that can prevent the occurrence of unforeseen circumstances caused by careless operation of a wireless connection device while eliminating the need for key management and password storage.

  The mobile X-ray imaging apparatus according to the embodiment includes a first storage unit, a first reception unit, a first authentication unit, an activation unit, a second storage unit, a first reception unit, and a pairing execution unit.

  The first storage unit stores, for each user, user identification information and reference information including authentication information of the user in association with each other.

  The first accepting unit accepts an input of an activation instruction including user authentication information without an input operation of the authentication information by the user.

  The first authentication means performs user authentication by comparing authentication information in the activation instruction with reference information in the first storage means.

  The activation unit activates the apparatus main body when the user authentication is successful.

  In the second storage unit, device identification information of one wireless connection device wirelessly connected to the apparatus main body is written between the start of the apparatus main body and the start of X-ray imaging.

  The first receiving unit receives a pairing instruction including device identification information from a wireless connection device that has performed user authentication.

  The pairing execution unit writes the device identification information in the pairing instruction to the second storage unit.

FIG. 1 is a schematic diagram illustrating a configuration of a mobile X-ray imaging apparatus according to an embodiment. FIG. 2 is a schematic diagram for explaining a user list in the mobile X-ray imaging apparatus according to the embodiment. FIG. 3 is a schematic diagram for explaining a modification of the group information in the embodiment. FIG. 4 is a schematic diagram for explaining a pairing table in the embodiment. FIG. 5 is a schematic diagram illustrating the configuration of the hand switch according to the embodiment. FIG. 6 is a schematic diagram for explaining a user list in the wireless connection device in the embodiment. FIG. 7 is a schematic diagram showing the configuration of the X-ray detector in the same embodiment. FIG. 8 is a flowchart for explaining the operation in the embodiment. FIG. 9 is a flowchart for explaining a start-up operation in the embodiment. FIG. 10 is a flowchart for explaining the pairing execution operation in the embodiment. FIG. 11 is a flowchart for explaining the group registration operation in the embodiment. FIG. 12 is a flowchart for explaining a command check operation in the embodiment. FIG. 13 is a schematic diagram for explaining a user list in the mobile X-ray imaging apparatus according to a modification of the embodiment. FIG. 14 is a flowchart for explaining a starting operation in the modification.

Hereinafter, a mobile X-ray imaging apparatus according to an embodiment will be described with reference to the drawings.
FIG. 1 is a schematic diagram illustrating a configuration of a mobile X-ray imaging apparatus according to an embodiment. FIGS. 2 to 4 are schematic diagrams for explaining a user list and a pairing table stored in a storage circuit. It is. This mobile X-ray imaging apparatus 1 has a main body capable of wireless communication with wireless connection devices such as a hand switch 20 and an X-ray detector 30, and includes an X-ray tube 2, an X-ray diaphragm 3, a support arm 4, a support column 5, a housing 6, a front wheel 7 and a rear wheel 8.

  Based on the tube current supplied from the high voltage generation circuit 11 provided in the housing 6 and the applied tube voltage, the X-ray tube 2 is changed from the X-ray focus (tube focus) to the X-ray tube. Is generated. X-rays generated at the tube focus are emitted toward an irradiation range limited by the X-ray stop 3. The X-ray tube 2 is provided at the tip of the support arm 4, for example. The X-ray tube 2 is connected to a high voltage generation circuit 11 in the housing 6 via a high voltage cable provided on the support arm 4 and the support column 5.

  The X-ray diaphragm 3 limits the X-ray irradiation range in accordance with a user operation. Specifically, the X-ray diaphragm 3 is configured so that the X-ray generated at the tube focal point does not cause unnecessary exposure to a region other than the imaging region desired by the user. It limits according to the irradiation area which irradiates the surface with X-rays. For example, the X-ray diaphragm 3 limits the irradiation range by moving the diaphragm blades under the control of the control circuit 16 in accordance with the irradiation range limitation instruction input by the input interface circuit 14.

  The X-ray diaphragm 3 is provided with a plurality of predetermined filters (hereinafter referred to as “radiation quality adjustment filters”) inserted into the X-ray irradiation field for the purpose of reducing the exposure dose to the subject P and improving the image quality. You may have. The plurality of quality control filters have different thicknesses. Note that the quality control filters may be made of different materials and may have the same thickness. The quality control filter changes the quality of X-rays generated at the tube focus according to the thickness. The quality control filter is made of, for example, aluminum or copper.

  The support arm 4 rotatably supports the X-ray tube 2 at one end (tip) of both ends of the support arm 4. The other end of both ends of the support arm 4 is connected to a part of the column 5 provided in the housing 6.

  The support column 5 is supported upright in a vertical direction on a part of the housing 6. Note that the support of the column 5 by the housing 6 is not limited to the upright, but may be inclined. The support column 5 supports the support arm 4 so as to be movable in a substantially vertical direction. In addition, the support | pillar 5 may be rotatable by making a long axis of the support | pillar 5 into a rotating shaft by a user's operation.

  The housing 6 includes a high voltage generation circuit 11, a storage circuit 12, a processing circuit 13, an input interface circuit 14, a communication interface circuit 15, a control circuit 16, a display circuit 17, and a counter weight (not shown). In FIG. 1, “I / F” is an abbreviation for “interface”. The counterweight is provided in the housing 6 in order to maintain the weight balance of the mobile X-ray imaging apparatus 1. The housing 6 can be moved in the direction desired by the user by the front wheel 7 and the rear wheel 8.

  The high voltage generation circuit 11 includes various control circuits for controlling tube current, tube voltage, imaging time, and the like, a high voltage transformer, a high voltage rectifier, a filament transformer, and the like. The high voltage generation circuit 11 generates a tube current supplied to the X-ray tube 2 and a tube voltage applied to the X-ray tube 2. Specifically, the high voltage generation circuit 11 supplies a tube current suitable for X-ray imaging to the X-ray tube under the control of the control circuit 16 and is suitable for X-ray imaging. A tube voltage is applied to the X-ray tube 2. The X-ray irradiation conditions include, for example, tube current, tube voltage, irradiation time, product of tube current (mA) and irradiation time (s) (hereinafter referred to as tube current time product (mAs)), and the like.

  The storage circuit 12 stores various control programs, authentication programs, user lists LS, pairing tables PR, user instructions input from the input interface circuit 14, imaging conditions related to X-ray imaging, and the like of the mobile X-ray imaging apparatus 1. Stores various data groups. The storage circuit 12 includes a large-capacity storage device such as various memories, an HDD (Hard Disk Drive), and an SSD (Solid State Drive).

  Here, as shown in FIG. 2, the user list LS is described in association with group information, user identification information, and reference information including authentication information of the user for each user. However, the group information is not essential and may be omitted. Here, as the authentication information, readable information such as barcode information or biometric information can be used as appropriate. Supplementally, as authentication information, secret information that requires an input operation such as a password at the time of password authentication and pattern drawing information at the time of pattern lock authentication is not used. The secret information (authentication information) input operation here means secret information such as an operation of sequentially inputting a plurality of character codes constituting a password and an operation of sequentially inputting a plurality of lines for inputting a pattern drawing. Means the operation of inputting the secret information for each constituent element. In other words, since both barcode information and biometric information that can be used as authentication information can be read in a lump, they do not fall under the above-mentioned “secret information that requires an input operation”. The barcode information may be information that can be optically read from a user ID card or the like, for example. Here, since the user always carries the ID card, unlike a conventional physical key, there is no need to newly provide a strictly managed mechanism. When the authentication information is barcode information, the input interface circuit 14 includes a barcode reader or camera for reading the barcode information. In the present embodiment and its modifications, the case where the authentication information is biometric information will be described as a representative example.

  The group information is, for example, a flag indicating whether or not the group has been registered. The group information has been registered and a value “1” is set. The group information is reset to a value “0” when the power is turned off. Note that the group information is not limited to a flag, but may be a list in which user identification information and reference information are associated and described for each user registered as a group among users in the user list LS, for example, as shown in FIG. .

  The user identification information is information for identifying a user. For example, a name, an employee number, and the like can be used as appropriate.

  The reference information is user authentication information registered in advance for user authentication. When the authentication information is biometric information, the reference information is also called template data. For example, the reference information is a data set that represents the measurement value of the user acquired at the time of registration, and is collated with the biometric information of the user newly acquired at the time of biometric authentication by the biometric authentication device. In the present embodiment and its modifications, a case where user authentication is biometric authentication will be described as a representative example.

  As shown in FIG. 3, in the pairing table PR, the device identification information of one wireless connection device wirelessly connected to the apparatus main body is written after the apparatus main body is started until X-ray imaging is started. It is a table. In the example illustrated in FIG. 3, the pairing table PR stores device identification information written by the processing circuit 13 for each device type of wireless connection devices that can communicate with the apparatus main body. However, the device type in the pairing table PR is an optional item and may be omitted. Here, the device type is information indicating the type of device capable of wireless communication. For example, information indicating a hand switch and information indicating an X-ray detector can be used as appropriate. When there are a plurality of the same types, a connection flag may be written in association with the device identification information. The connection flag is a flag indicating whether or not the paired registered device is connected to the mobile X-ray imaging apparatus. When the connected flag is in the connected state, the value “1” is set and the connected flag is not in the connected state. The value is reset to “0”. As the connection state, for example, a device that lastly registered pairing or a device that has updated pairing registration may be set as the connection flag “1”.

  The device identification information is device-specific information including the device type, and is information for identifying a device connected to the mobile X-ray imaging apparatus 1. In this example, the pairing table PR can write the device identification information of one hand switch and the device identification information of one X-ray detector.

  The processing circuit 13 includes a processor and a memory (not shown). When the power is turned on, the processing circuit 13 temporarily stores the authentication program, the user list LS, and the pairing table PR read from the storage circuit 12 in the memory. Thereafter, the processing circuit 13 implements an activation function 13a, a pairing function 13b, a group registration function 13c, and a command confirmation function 13d by the processor executing the authentication program in the memory. The group registration function 13c may be omitted. If the group registration function 13c is omitted, the command confirmation function 13d refers to the storage circuit 12 without using the group information and permits or rejects the command.

  The activation function 13a compares the authentication information in the activation instruction received from the input interface circuit 14 with the reference information of the user list LS in the storage circuit 12, thereby performing user authentication and the user And a function for starting the apparatus main body when the authentication is successful. In addition to the user authentication, the activation function 13a performs barcode authentication that collates the barcode information optically read from the user's ID card or the like with the barcode information preset in the user list LS. May be executed. This barcode authentication is not limited to the activation instruction, and may be used for command authentication by the command confirmation function 13d. Alternatively, the activation function 13a may execute barcode authentication as user authentication.

  The pairing function 13 b includes a pairing execution function for writing the device identification information in the pairing instruction to the pairing table PR in the storage circuit 12 based on the device type in the pairing instruction received from the communication interface circuit 15. It is out. If the pairing instruction does not include the device type, the pairing function 13b writes the device identification information in the pairing instruction received from the communication interface circuit 15 to the pairing table PR in the storage circuit 12. Includes execution function.

  The group registration function 13c includes a first registration function that writes group information indicating reference information used for user authentication to the storage circuit 12 when user authentication by the activation function 13a is successful. The group registration function 13c is a second authentication function for executing user authentication by comparing authentication information in the group registration instruction received from the input interface circuit 14 with reference information of the user list LS in the storage circuit 12. And a second registration function for writing group information indicating reference information used for the user authentication to the storage circuit 12 when the user authentication is successful. The group registration function 13c also writes third group information indicating reference information related to the user identification information to the storage circuit 12 based on the user identification information in the group registration instruction received by the communication interface circuit 15. Features may be included.

  The command confirmation function 13d determines whether or not the user identification information in the command received from the communication interface circuit 15 matches the user identification information related to the reference information indicated by the group information in the storage circuit 12. Has a judgment function. The command confirmation function 13 d has a second determination function for determining whether the device identification information in the command received from the communication interface circuit 15 matches the device identification information in the pairing table PR in the storage circuit 12. . Further, the command confirmation function 13d has a permission function for permitting execution of the command when the determination results of the first determination function and the second determination function indicate coincidence.

  The input interface circuit 14 receives input of various instructions, instructions, information, selection, and settings from the user. Information that accepts input includes various instructions including user authentication information (eg, activation instruction, group registration instruction, etc.) and other information. Various instructions including user authentication information are sent to the processing circuit 13. Although not shown, the input interface circuit 14 includes a trackball, various switch buttons for performing user input operations, a mouse, a keyboard, and the like, a biological information sensor for performing read operations by the user, and the like. The input interface circuit 14 may have a barcode reader for barcode authentication. In addition, as the biological information sensor of the mobile X-ray imaging apparatus 1, a camera and a fingerprint sensor can be used as appropriate, but biological information similar to the biological information (fingerprint information) input from the hand switch 20 or the like is used. From the viewpoint of input, a fingerprint sensor is preferable. In this case, since the biometric authentication of the user of the mobile X-ray imaging apparatus 1, the hand switch 20, and the X-ray detector 30 can be executed with one type of biometric information, it is easy to implement biometric authentication. The trackball, keyboard, and mouse may not be installed. The input interface circuit 14 detects the coordinates of the cursor displayed on the display screen, and outputs the detected coordinates to the control circuit 16. The input interface circuit 14 may be a touch panel provided so as to cover the display screen in the display circuit 17. In this case, the input interface circuit 14 detects coordinates instructed by a touch reading principle such as an electromagnetic induction type, an electromagnetic distortion type, and a pressure sensitive type, and outputs the detected coordinates to the control circuit 16.

  Specifically, the input interface circuit 14 inputs X-ray imaging conditions desired by the user, the presence / absence of a grid, and the like according to a user instruction. The imaging conditions include, for example, a plurality of imaging directions with respect to the subject, a plurality of imaging regions, a plurality of physiques related to the imaging target, and the like. Further, the input interface circuit 14 accepts an input of an activation instruction including user authentication information without an input operation of the authentication information by the user. “Accepting without the authentication information input operation” may be read as “accepting by the authentication information reading operation”, for example. Further, the authentication information reading operation and the activation instruction input operation may be substantially the same operation such as operating a hand switch provided with a biological information sensor. Alternatively, the authentication information reading operation and the activation instruction input operation may be different from each other, for example, an operation of clicking an activation instruction button after the barcode information reading operation.

  The communication interface circuit 15 has a not-shown antenna and is a transmission / reception circuit for wirelessly communicating with the hand switch 20 and the X-ray detector 30. For example, when the communication interface circuit 15 receives a pairing instruction including device identification information from a wireless connection device that has performed user authentication, the communication interface circuit 15 sends the pairing instruction to the processing circuit 13. The pairing instruction may include the device type and device identification information of the wireless connection device that has executed user authentication. For example, when the communication interface circuit 15 receives a group registration instruction including user identification information related to the reference information used for the user authentication from the wireless connection device that has performed the user authentication, the communication interface circuit 15 receives the group registration instruction. To send. Further, for example, when the communication interface circuit 15 receives a command including device identification information and user identification information related to the reference information used for the user authentication from the wireless connection device that has performed user authentication, the communication interface circuit 15 processes the command. Send to circuit 13. Further, for example, when receiving the X-ray image data from the X-ray detector 30, the communication interface circuit 15 writes the X-ray image data in the storage circuit 12.

  The control circuit 16 includes a CPU (Central Processing Unit) and a memory (not shown). Note that the control circuit 16 may include circuits such as various processing circuits. The control circuit 16 temporarily stores information such as user instructions and imaging conditions sent from the input interface circuit 14 in a memory (not shown). The control circuit 16 controls the high voltage generation circuit 11, the X-ray diaphragm 3, and the like in order to execute X-ray imaging in accordance with user instructions, imaging conditions, and the like stored in the memory.

  The display circuit 17 outputs various conditions input to the input interface circuit 14. Specifically, the display circuit 17 includes a display that displays various conditions and the like, a monitor, and the like. A display, a monitor, etc. are provided in the vicinity of a handle (not shown), for example. Note that the display circuit 17 may include a speaker that outputs sound. The display circuit 17 displays an X-ray image of the subject P based on the X-ray image data written in the storage circuit 12.

  The hand switch 20 is a portable switch. As shown in FIG. 5, the hand switch 20 includes a memory circuit 21, an input interface circuit 22, a control circuit 23, an authentication circuit 24, a communication interface circuit 25, and an LED (Light-Emitting Diode) 26. I have.

  As shown in FIG. 6, the storage circuit 21 stores, for each user, a user list LS1 in which user identification information and reference information including authentication information of the user are associated and described. This user list LS1 is obtained by omitting group information from the above-described user list LS. However, the user list LS1 is not limited to this, and if the user identification information is common with the user identification information in the user list LS, other authentication information of the same user may be used as the reference information. The storage circuit 21 is configured by various memories, a large-capacity storage device such as an HDD (Hard Disk Drive), an SSD (Solid State Drive), or the like.

  The input interface circuit 22 is a circuit that inputs various instructions from the user and user authentication information to the control circuit 23 in accordance with a user operation. For example, a button switch in which a push button and a biological information sensor are integrated is provided. Have. As various instructions, for example, a user group registration instruction, a pairing instruction, or an X-ray irradiation instruction can be used as appropriate. As a user's biological information, in principle, a face image, an iris, a fingerprint, or the like can be used as appropriate, but a fingerprint is preferable from the viewpoint of integrating the push button and the biological information sensor.

  Upon receiving various instructions (eg, pairing instruction, group registration instruction) and authentication information from the input interface circuit 22, the control circuit 23 causes the authentication circuit 24 to execute user authentication, and when user authentication is successful, Various instructions including device identification information and user identification information related to reference information used for user authentication are sent to the communication interface circuit 25. The various instructions sent to the communication interface circuit 25 may further include the device type of the own device. Further, the control circuit 23 operates in the same manner when receiving an X-ray imaging command and authentication information instead of various instructions and authentication information. The command including the user identification information related to the reference information used for the communication is sent to the communication interface circuit 25. Similarly, the command sent to the communication interface circuit 25 may further include the device type of the own device.

  The authentication circuit 24 compares the authentication information received from the control circuit 23 with the reference information in the storage circuit 21, thereby executing user authentication and notifying the control circuit 23 whether or not the user authentication is successful. .

  The communication interface circuit 25 is a transmission / reception circuit having an antenna (not shown), and transmits various instructions or commands received from the control circuit 23 to the mobile X-ray imaging apparatus 1. When the communication interface circuit 25 receives a signal indicating the completion of pairing from the mobile X-ray imaging apparatus 1, it outputs an output signal to the LED 26.

  When the LED 26 receives the output signal from the communication interface circuit 25, the LED 26 outputs visible light.

  The X-ray detector 30 is a portable detector and may be called an FPD (Flat Panel Detector). As shown in FIG. 7, the X-ray detector 30 includes a storage circuit 31, an input interface circuit 32, a control circuit 33, an authentication circuit 34, a communication interface circuit 35, an image detector 36, and an output circuit 37.

  The storage circuit 31 stores a user list LS1 as shown in FIG. The storage circuit 31 includes various types of memory, a mass storage device such as an HDD (Hard Disk Drive), an SSD (Solid State Drive), or the like.

  The input interface circuit 32 is a circuit that inputs various instructions from the user and user authentication information to the control circuit 33 in accordance with a user operation. For example, a button switch in which a push button and a biological information sensor are integrated is provided. Have. As various instructions, for example, a user group registration instruction or a pairing instruction can be used as appropriate. In addition, as a user's biometric information, a face image, an iris, a fingerprint, etc. can be used suitably, but in this example, the biometric information similar to the biometric information (fingerprint information) input from the hand switch 20 is input. From the viewpoint, fingerprint information is used.

  Upon receiving various instructions (for example, pairing instruction, group registration instruction) and authentication information received from the input interface circuit 22, the control circuit 33 causes the authentication circuit 24 to execute user authentication, and when user authentication is successful, Various instructions including device identification information of the device and user identification information related to the reference information used for user authentication are sent to the communication interface circuit 35. The various instructions sent to the communication interface circuit 35 may further include the device type of the own device. Further, when receiving a signal indicating the completion of pairing from the mobile X-ray imaging apparatus 1 via the communication interface circuit 35, the control circuit 33 activates the image detector 36 and outputs an output signal to the output circuit 37.

  The authentication circuit 34 compares the authentication information received from the control circuit 33 with the reference information in the storage circuit 31, thereby executing user authentication and notifying the control circuit 33 whether or not the user authentication is successful. .

  The communication interface circuit 35 is a transmission / reception circuit having an antenna (not shown), transmits various instructions received from the control circuit 33 to the mobile X-ray imaging apparatus 1, and receives signals received from the mobile X-ray imaging apparatus 1 as a control circuit. To 33. The communication interface circuit 35 transmits the X-ray image data received from the image detector 36 to the mobile X-ray imaging apparatus 1.

  The image detector 36 is generated by the X-ray tube 2, is limited by the X-ray diaphragm 3, detects X-rays transmitted through the subject P, and outputs X-ray image data. The image detector 36 includes a flat panel detector having a plurality of semiconductor detection elements, an analog-to-digital converter (hereinafter referred to as an A / D converter), an image generation circuit, and an image memory. The semiconductor detection element includes a direct conversion type and an indirect conversion type. The direct conversion type is a type in which incident X-rays are directly converted into electrical signals. The indirect conversion form is a form in which incident X-rays are converted into light by a phosphor and the light is converted into an electrical signal. In any form, the plurality of semiconductor detection elements generate an electrical signal with the incidence of X-rays and output the electrical signal to the A / D converter. The A / D converter converts the electrical signal into digital data and outputs the digital data to the image generation circuit. The image generation circuit generates X-ray image data based on the digital data, and outputs the X-ray image data to the image memory. X-ray image data in the image memory is output to the communication interface circuit 35.

  In response to the output signal from the control circuit 33, the output circuit 37 outputs a pairing state indicating whether or not pairing has been completed, using an LED, a speaker, or the like.

  Next, the operation of the mobile X-ray imaging apparatus configured as described above will be described with reference to the flowcharts of FIGS. In the following description, a case where authentication information is biometric information and user authentication is biometric authentication will be described as an example. However, as the authentication information, any information that does not require an input operation by the user may be used. Therefore, for example, readable information such as barcode information may be used instead of the biological information. Further, as the authentication information, information that requires an input operation by the user is excluded, and for example, passwords and pattern drawing information are excluded. Similarly, as user authentication, for example, barcode authentication for collating barcode information may be used instead of biometric authentication. Similarly, authentication processing other than password authentication and pattern lock authentication is used as user authentication.

  First, as shown in FIG. 8, the mobile X-ray imaging apparatus 1 is powered on by a user operation (step ST10). As a result, the processing circuit 13 reads the program in the storage circuit 12 and executes the processing. First, the processing circuit 13 executes the activation process of step ST20. That is, the processing circuit 13 causes the display circuit 17 to display a screen that prompts the user to input an activation instruction.

  As shown in FIG. 9, when the input interface circuit 14 accepts an input of an activation instruction including the user's biometric information without a biometric information input operation by the user (step ST <b> 21), the activation instruction is received. Is sent to the processing circuit 13. Here, fingerprint information is used as biometric information.

  The processing circuit 13 performs biometric authentication by collating biometric information in the activation instruction received from the input interface circuit 14 with reference information in the user list LS by using the activation function 13a (step ST22). If successful, the apparatus main body is activated (step ST23). If biometric authentication fails, the process returns to step ST21.

  After the activation of the apparatus main body, the processing circuit 13 writes group information (flag) indicating the reference information used for the biometric authentication into the storage circuit 12 by the group registration function 13c (step ST24). The processing circuit 13 may write group information obtained by copying user identification information and reference information related to a user who has succeeded in biometric authentication into the storage circuit 12 without using a flag. Further, any of steps ST23 and ST24 may be executed first. Thereby, the starting process of step ST20 is completed.

Next, the processing circuit 13 executes the pairing process of step ST30.
For example, it is assumed that the hand switch 20 receives a pairing command including the biological information of the user by the operation of the input interface circuit 22 by the user. At this time, the hand switch 20 performs biometric authentication on the biometric information, and when biometric authentication is successful, transmits a group registration instruction to the mobile X-ray imaging apparatus 1.

  In the mobile X-ray imaging apparatus 1, as shown in FIG. 10, when a pairing instruction including a device type and device identification information is transmitted wirelessly from the hand switch 20 that has performed biometric authentication, the pairing instruction is communicated. Received by the interface circuit 15 (step ST31). Note that the device type may be omitted from the pairing instruction. In any case, after step ST31, a pairing instruction is sent from the communication interface circuit 15 to the processing circuit 13.

  Based on the device type in the pairing instruction, the processing circuit 13 writes the device identification information in the pairing instruction in the pairing table PR in the storage circuit 12 by the pairing function 13b (step ST32). Thereafter, the mobile X-ray imaging apparatus 1 transmits a signal indicating the completion of pairing to the hand switch 20 by radio. The hand switch 20 is activated upon receiving this signal and outputs visible light from the LED 26. Hereinafter, if there is a device to be paired with another device type, the process returns to step ST31, and if not, the process proceeds to step ST40 (step ST33). In this example, the processes of steps ST31 to ST32 are executed similarly for the X-ray detector 30 as well. Further, transmission of a signal indicating completion of pairing after pairing, activation of the X-ray detector 30 and output of visible light from the output circuit 37 are executed in the same manner. When the pairing instruction does not include the device type in step ST31, step ST33 is executed as a process that returns to step ST31 when the pairing process is not terminated, and proceeds to step ST40 when it is terminated. Here, as a case where the pairing process is ended, for example, when the device identification information is written a predetermined number of times, a predetermined time has elapsed, or a pairing process end instruction is input from the input interface circuit 14 Etc. can be used as appropriate.

Next, the mobile X-ray imaging apparatus 1 executes group registration processing in step ST40.
It is assumed that the input interface circuit 14 receives an input of a group registration instruction including the user's biometric information by a user operation (step ST41: Yes). In this case, the group registration instruction is sent from the input interface circuit 14 to the processing circuit 13.

  The processing circuit 13 performs biometric authentication of the user by collating the biometric information in the group registration instruction with the reference information of the user list LS in the storage circuit 12 by using the group registration function 13c (step ST42). When the biometric authentication is successful, the processing circuit 13 writes group information indicating reference information used for the biometric authentication into the storage circuit 12 by the group registration function 13c (step ST43). For example, when the value of the group information (flag) related to the reference information used for biometric authentication is “0”, the value “1” is written as the group information. As a result, user group registration is executed. Moreover, when the biometric authentication of step ST42 fails, it progresses to step ST46.

  On the other hand, when the input is not accepted in step ST41 (step ST41: No), for example, the hand switch 20 (or the X-ray detector 30) registers the group including the user's biological information by the operation of the input interface circuit 22 by the user. Assume that an instruction is accepted. At this time, the hand switch 20 (or the X-ray detector 30) performs biometric authentication on the biometric information, and transmits a group registration instruction to the mobile X-ray imaging apparatus 1 when the biometric authentication is successful.

  Thereby, the communication interface circuit 15 receives the group registration instruction including the user identification information related to the reference information used for the biometric authentication from the hand switch 20 (or the X-ray detector 30) that performed the biometric authentication (step). ST44: Yes). The received group registration instruction is sent from the communication interface circuit 15 to the processing circuit 13.

  Based on the user identification information in the group registration instruction, the processing circuit 13 writes group information indicating reference information related to the user identification information in the storage circuit 12 by the group registration function 13c (step ST45). In addition, when not receiving by step ST44 (step ST44: No), it progresses to step ST46.

  In step ST46, if another user is registered as a group, the process returns to step ST41. If not, the process proceeds to step ST50.

  In step ST50, the mobile X-ray imaging apparatus 1 is moved together with the paired hand switch 20 and X-ray detector 30 for rounds. In addition to this, other X-ray detectors (not shown) that may be paired later may be moved.

  After step ST50, it is assumed that the patient P arrives at the patient's room and performs X-ray imaging. At this time, the positioning of the apparatus is executed by the user's operation (step ST60). For example, the X-ray detector 30 is disposed at a position facing the X-ray tube 2 through the subject P. At this time, in the X-ray detector 30, it is assumed that the output circuit 37 outputs a pairing state indicating that pairing registration is present. It is assumed that the user arranges the connected X-ray detector 30 by the output from the output circuit 37 as described above. Alternatively, at the time of positioning, a pairing instruction may be newly transmitted from another X-ray detector to update the pairing table PR. That is, at the time of positioning, step ST30 may be re-executed by another X-ray detector.

  Subsequently, the input interface circuit 14 sets shooting conditions in the storage circuit 12 by a user operation (step ST70). Thus, preparation for shooting is completed.

Next, the mobile X-ray imaging apparatus 1 executes a command check process in step ST80. When the hand switch 20 receives an X-ray imaging command including the user's biometric information by the operation of the input interface circuit 22 by the user, the hand switch 20 performs biometric authentication on the biometric information. In addition, when the biometric authentication is successful, the hand switch 20 transmits an X-ray imaging command to the mobile X-ray imaging apparatus 1.
The communication interface circuit 15 receives an X-ray imaging command including device identification information and user identification information related to the reference information used for the biometric authentication from the hand switch 20 that has performed biometric authentication (step ST81). . The received X-ray imaging command is sent from the communication interface circuit 15 to the processing circuit 13.

  The processing circuit 13 determines whether or not the user identification information in the X-ray imaging command matches the user identification information related to the reference information indicated by the group information in the storage circuit 12 by using the command confirmation function 13d ( Step ST82). If the determination result in step ST82 is negative, the X-ray imaging is not performed and the process returns to the state after step ST70.

  If the determination result in step ST82 indicates a match, the processing circuit 13 uses the command confirmation function 13d to match the device identification information in the X-ray imaging command with the device identification information in the pairing table PR in the storage circuit 12. (Step ST83). If the determination result in step ST83 is negative, X-ray imaging is not performed and the process returns to the state after step ST70.

  If the determination result in step ST83 indicates a match, the processing circuit 13 permits the X-ray imaging command to be executed by the command confirmation function 13d (step ST84). Note that step ST84 is executed when the determination results of steps ST82 and ST83 indicate coincidence, so steps ST82 and ST83 may be executed in the reverse order. The command check process can also be executed for a command input from the input interface circuit 14. In this case, instead of steps ST82 and ST83, when an input of a command including biometric information is received, biometric authentication for collating biometric information in the command with reference information and presence / absence of group information related to the reference information. Two-step authentication is performed with group authentication based.

  In any case, X-ray imaging is performed after step ST84 (step ST90).

  In step ST90, the X-ray detector 30 detects X-rays generated from the X-ray tube 2 and limited by the X-ray diaphragm 3 and transmitted through the subject P, and the obtained X-ray image data is transferred to the movable X-ray. It transmits to the radiography apparatus 1 by radio.

  The mobile X-ray imaging apparatus 1 receives this X-ray image data, stores it in the storage circuit 12, and displays it on the display circuit 17.

  As described above, according to an embodiment, user authentication is performed by comparing authentication information in the activation instruction with reference information in the first storage means (user list LS in the storage circuit 12). The reference information includes authentication information that does not require an input operation. When the user authentication is successful, the apparatus main body is activated. A pairing instruction including device identification information is received from the wireless connection device that has executed user authentication. The device identification information in the pairing instruction is written into the second storage means (pairing table PR of the storage circuit 12).

  Therefore, key management and password storage can be made unnecessary by user authentication based on authentication information that does not require an input operation. In addition, the pairing can prevent the occurrence of an unexpected situation caused by careless operation of the wireless connection device.

  Supplementally, the mobile X-ray imaging apparatus 1 performs user authentication when an activation instruction is input, and activates if the user authentication is successful. When inputting various instructions, the input interface circuit 14 may use a barcode reader that reads a barcode printed on a user ID card or the like. In this case, barcode authentication is executed as user authentication.

In addition, since each of the mobile X-ray imaging apparatus 1, the hand switch 20, and the X-ray detector 30 performs user authentication, various instructions can be easily input without a key or password. In this case, barcode authentication or biometric authentication is executed as user authentication.
In addition, when the authentication information is biometric information and the user authentication is biometric authentication, in addition to the various effects described above, an ID card or the like on which authentication information other than biometric information (eg, barcode information) is printed Management can be made unnecessary.
In addition, when the pairing instruction includes the device type and device identification information of the wireless connection device that has executed user authentication, the pairing execution function performs pairing based on the device type in the pairing instruction. The device identification information in the ring instruction is written into the second storage means (pairing table PR of the storage circuit 12). In this case, the second storage unit stores the written device identification information for each device type of the wireless connection device that can communicate with the apparatus main body.
Therefore, when the pairing instruction includes the device type and device identification information, whether there is a device to be paired with another device type based on whether the device identification information is stored for each device type. Can be determined.

  In addition, since the pairing of the mobile X-ray imaging apparatus 1 and the hand switch 20 and the pairing of the mobile X-ray imaging apparatus 1 and the X-ray detector 30 can be respectively performed, whether the wireless connection device is in a pairing state. It can be easily distinguished whether or not. Regardless of the number of mobile X-ray imaging apparatuses and wireless connection devices, it is possible to determine a wireless connection device that has been paired by a registered valid user. In addition, the user authentication at the wireless connection device can prevent a third party who is not registered in the user list LS1 from inputting a pairing instruction without permission.

  Accordingly, even when there are a plurality of wireless connection devices, it is possible to prevent X-rays from being irradiated in an unintended situation.

  In addition, a plurality of users can be registered in the user list LS, and one or more users at the time of a round visit can be registered as a group. Thereby, when two users go to the hospital room, the first user who started the mobile X-ray imaging apparatus 1 supports the patient, and another second user uses the hand switch 20 for X-ray imaging. When the second user is registered as a group, X-ray imaging can be performed.

  In addition, according to one embodiment, a command including device identification information and user identification information related to reference information used for the user authentication is received from a wireless connection device that has performed user authentication. Thereby, it is determined whether or not the user identification information in the command matches the user identification information related to the reference information indicated by the group information in the first storage unit. Further, it is determined whether the device identification information in the command matches the device identification information in the second storage means. Further, when these two-stage determination results indicate coincidence, execution of the command is permitted.

  Therefore, it is possible to confirm that the command is transmitted from the wireless connection device registered for pairing by the operation of the user registered for group registration. Therefore, it is possible to prevent the occurrence of unforeseen situations such as executing commands based on the operations of third parties such as non-user patients and attendants, and executing commands received from wireless connection devices that are not registered for pairing. can do. In addition, for example, when a plurality of mobile X-ray imaging apparatuses perform X-ray imaging at a position close to a level where radio signals can be received from each other, a malfunction caused by a mistake in wireless connection devices or the other mobile X-ray imaging apparatus It is possible to prevent malfunction based on the command for. For example, a first combination of user A, hand switch 20A and mobile X-ray imaging apparatus 1A and a second combination of user B, hand switch 20B and mobile X-ray imaging apparatus 1B are X-rayed in the same hospital room. If you do. In this case, if there is no group registration and only user authentication is performed, the user A may mistake the hand switches 20A and 20B and operate the hand switch 20B, and X-rays may be erroneously emitted from the mobile X-ray imaging apparatus 1B. There is sex.

  On the other hand, in one embodiment, authentication is performed in two stages of group registration and pairing registration. Therefore, even if the user A operates the hand switch 20B, the mobile X-ray imaging apparatus 1B issues a command by authenticating the group information. Since it refuses, the misirradiation of X-rays can be prevented.

  Furthermore, according to one embodiment, an input of a group registration instruction including user authentication information is accepted. User authentication is executed by collating the authentication information in the group registration instruction with the reference information in the first storage means. When the user authentication is successful, group information indicating reference information used for the user authentication is written in the first storage unit.

  In addition, a group registration instruction including user identification information related to the reference information used for the user authentication is received from the wireless connection device that has performed the user authentication. Based on the user identification information in the received group registration instruction, group information indicating reference information related to the user identification information is written in the first storage means.

  Accordingly, group registration can be performed both when the group registration instruction is input by operating the mobile X-ray imaging apparatus 1 and when the group registration instruction is received by operating the wireless connection device.

<Modification>
Next, a modification of the embodiment will be described.
In this modification, when each user has a role such as an operator, an administrator, or a serviceman, the mobile X-ray imaging apparatus 1 manages the authority of the operation according to the role.

  Specifically, for example, as shown in FIG. 13, the user list LS describes authority information associated with the above-described group information, user identification information, and reference information. Here, the group information, user identification information, and reference information are as described above.

  The authority information is information indicating the authority of the user, and any one of the operator authority, the administrator authority, and the serviceman authority is used for each user.

  The operator authority is an authority to execute an operation for an X-ray imaging work at the time of a round visit.

  The administrator authority is an authority to execute various setting operations such as user registration and photographing protocol editing in addition to the operator authority. The administrator authority may not include the operator authority.

  The serviceman authority is an authority for performing an operation for adjusting the apparatus main body in addition to the operator authority and the administrator authority.

  Accordingly, when the user authentication based on the activation instruction is successful in addition to the above-described function, the activation function 13a of the processing circuit 13 is in a mode corresponding to the authority information related to the reference information used for the user authentication. It has a function to start.

Other configurations are substantially the same as those of the above-described embodiment.
Next, the operation of the modified example configured as described above will be described. In the description, as described above, the case where the authentication information is biometric information and the user authentication is biometric authentication is described as an example.
As described above, after step ST10 shown in FIG. 8 is executed, the activation process of step ST20 is started. The processing circuit 13 causes the display circuit 17 to display a screen that prompts the user to input an activation instruction.

  Similarly, as shown in FIG. 14, it is assumed that steps ST21 to ST22 are executed and biometric authentication is successful (step ST22: Yes).

  At this time, the processing circuit 13 reads the authority information associated with the reference information used for the biometric authentication from the user list LS using the activation function 13a, and activates the apparatus main body in a mode corresponding to the authority information (step ST23a). ). For example, when the authority information represents “operator authority”, the apparatus main body is activated in the operation mode. When the authority information represents “administrator authority”, the apparatus main body is activated in the management mode. When the authority information indicates “serviceman authority”, the apparatus main body is activated in the service mode.

  After the activation of the apparatus main body, the processing circuit 13 executes step ST24 as described above. Similarly, any of steps ST23a and ST24 may be executed first. Thereby, the starting process of step ST20 is completed.

  Hereinafter, the mobile X-ray imaging apparatus 1 performs processing according to the mode. For example, in the case of the operation mode, the processes of steps ST30 to ST90 described above are executed. In the management mode, the above-described operation mode processing is executed, or processing corresponding to various setting operations such as user registration and imaging protocol editing is executed. In the case of the service mode, the above-described operation mode or management mode processing is executed, or processing corresponding to an operation for adjusting the apparatus main body is executed.

  As described above, according to the modification, when the user authentication based on the activation instruction is successful, the apparatus main body is activated in a mode corresponding to the authority information related to the reference information used for the user authentication. In addition to the effects, unauthorized operations can be prevented. For example, in order to prevent an input in the service mode by a user having only operator authority, an unintended setting change can be prevented.

  The term “processor” used in the above description is, for example, a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), or an application specific integrated circuit (ASIC)), a programmable logic device (for example, It means a circuit such as a simple programmable logic device (SPLD), a complex programmable logic device (CPLD), and a field programmable gate array (FPGA). The processor implements a function by reading and executing a program stored in the storage circuit. Instead of storing the program in the storage circuit, the program may be directly incorporated in the processor circuit. In this case, the processor realizes the function by reading and executing the program incorporated in the circuit. Note that each processor of the present embodiment is not limited to being configured as a single circuit for each processor, but may be configured as a single processor by combining a plurality of independent circuits to realize the function. Good. Furthermore, a plurality of components in FIG. 1 may be integrated into one processor to realize the function.

  The user list LS and the storage circuit 12 in one embodiment are an example of a first storage unit in the claims. The input interface circuit 14 in one embodiment is an example of a first receiving unit and a second receiving unit in the claims. The activation function 13a and the processing circuit 13 in one embodiment are examples of the first authentication unit and the activation unit in the claims. The pairing table PR and the storage circuit 12 in one embodiment are an example of the second storage unit in the claims. The communication interface circuit 15 in one embodiment is an example of a first receiving unit, a second receiving unit, and a third receiving unit in the claims. The pairing function 13b and the processing circuit 13 in one embodiment are an example of a pairing execution unit in the claims. The group registration function 13c and the processing circuit 13 in one embodiment are an example of a first registration unit, a second authentication unit, a second registration unit, and a third registration unit in the claims. The command confirmation function 13d and the processing circuit 13 in one embodiment are examples of first determination means, second determination means, and permission means in the claims.

  In addition, although some embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the invention described in the claims and equivalents thereof in the same manner as included in the scope and gist of the invention.

  DESCRIPTION OF SYMBOLS 1 ... Mobile X-ray imaging apparatus, 2 ... X-ray tube, 3 ... X-ray aperture, 4 ... Support arm, 5 ... Support | pillar, 6 ... Housing, 7 ... Front wheel, 8 ... Rear wheel, 11 ... High voltage generation circuit , 12, 21, 31 ... storage circuit, 13 ... processing circuit, 13a ... start-up function, 13b ... pairing function, 13c ... group registration function, 13d ... command confirmation function, 14, 22, 32 ... input interface circuit, 15, 25, 35 ... Communication interface circuit, 16, 23, 33 ... Control circuit, 17 ... Display circuit, 20 ... Hand switch, 24, 34 ... Authentication circuit, 26 ... LED, 30 ... X-ray detector, 36 ... Image detector 37, output circuit, LS, LS1, user list, PR, pairing table.

Claims (7)

First storage means for storing, in association with each other, user identification information and reference information including authentication information of the user;
First receiving means for receiving an input of a start instruction including user authentication information without an input operation of the authentication information by the user;
First authentication means for executing user authentication by comparing authentication information in the activation instruction with reference information in the first storage means;
An activation means for activating the apparatus main body when the user authentication is successful;
A second storage means in which device identification information of one wireless connection device wirelessly connected to the device main body is written after starting the device main body until starting X-ray imaging;
First receiving means for receiving a pairing instruction including device identification information from a wireless connection device that has executed user authentication;
A mobile X-ray imaging apparatus, comprising: a pairing execution unit that writes device identification information in the pairing instruction to the second storage unit. The authentication information is biometric information,
The mobile X-ray imaging apparatus according to claim 1, wherein the user authentication is biometric authentication. First registration means for writing group information indicating reference information used for user authentication into the first storage means when the user authentication is successful;
Second receiving means for receiving a command including device identification information and user identification information related to reference information used for the user authentication from the wireless connection device that has performed user authentication;
First determination means for determining whether user identification information in the command matches user identification information related to reference information indicated by the group information in the first storage means;
Second determination means for determining whether the device identification information in the command matches the device identification information in the second storage means;
Permission means for permitting execution of the command when the determination results of the first determination means and the second determination means respectively indicate a match;
The mobile X-ray imaging apparatus according to claim 1 or 2, further comprising: Second accepting means for accepting input of a group registration instruction including user authentication information;
Second authentication means for performing user authentication by collating authentication information in the group registration instruction with reference information in the first storage means;
A second registration unit for writing group information indicating reference information used for the user authentication to the first storage unit when the user authentication by the second authentication unit is successful;
Third receiving means for receiving a group registration instruction including user identification information related to reference information used for the user authentication from the wireless connection device that has performed user authentication;
A third registration unit that writes group information indicating reference information related to the user identification information to the first storage unit based on the user identification information in the received group registration instruction;
The mobile X-ray imaging apparatus according to claim 1 or 2, further comprising: The pairing instruction includes a device type and device identification information of the wireless connection device that has executed the user authentication,
The pairing execution means is means for writing the device identification information in the pairing instruction to the second storage means based on the device type in the pairing instruction,
The second storage unit stores the device identification information written by the pairing execution unit for each device type of the wireless connection device that can communicate with the apparatus main body.
The mobile X-ray imaging apparatus according to claim 1 or 2.   The mobile X-ray imaging apparatus according to claim 5, wherein the device type is information indicating an X-ray detector.   The mobile X-ray imaging apparatus according to claim 5, wherein the device type is information indicating a hand switch.