JP6412044B2 - Radiographic imaging apparatus, and radiographic imaging apparatus control method and program - Google Patents

Description

  The present invention relates to a radiographic imaging apparatus that acquires a radiographic image of a subject, and a control method and program for the radiographic imaging apparatus.

  Conventionally, as disclosed in Patent Documents 1 to 3, for example, various radiographic imaging apparatuses using a movable radiation irradiation apparatus are known. Such a radiographic imaging device basically holds a leg portion that can be run by wheels, a battery for driving the radiation source, and an electric circuit for driving the radiation source, and is held on the leg portion. The subject is irradiated with radiation using a round-wheel-type radiation irradiating apparatus including a main body, an arm connected to the main body, and a radiation source attached to the arm. .

  In addition, a radiographic imaging device using a portable radiation irradiation device that is equipped with only the minimum components for radiation irradiation, such as a radiation source and an electric circuit, and is operated by an operator by hand is proposed. ing. Such a portable radiation irradiation device is light enough to be operated by an operator by hand, and can be photographed with a smaller turn than the above-described round-the-wheel radiation irradiation device. ing.

  When a radiographic image of a subject is captured by such a radiographic imaging device, a radiation detector (so-called “Flat Panel Detector”) that normally records a radiographic image representing the subject by irradiation of radiation that has passed through the subject. ) Is used. As such a radiation detector, a cassette type radiation detector in which a control unit such as an image detection unit, a driving battery, and an electric circuit related to driving is housed in a housing is well known. Then, if such a radiation detector is disposed at a position facing the radiation irradiation apparatus with the subject interposed therebetween, and the radiation irradiation apparatus is driven in this state, the radiation transmitted through the subject is detected by the radiation detector. A radiographic image represented by radiation that has been irradiated to the subject and transmitted through the subject is acquired.

  Further, in the radiographic imaging apparatus in which the radiation irradiation apparatus and the radiation detector as described above are separated, the subject is photographed with a camera to represent the surface of the subject for the purpose of recognizing the irradiation field or the like. A technique for acquiring a captured image and displaying it has been proposed (see Patent Documents 1 to 3). Further, in a radiographic imaging device in which the radiation irradiation device and the radiation detector are separate, a deviation between the radiation irradiation field and the detection range of the radiation detector is likely to occur. For this reason, Patent Documents 1 to 3 also propose a method in which a frame indicating the radiation field and a frame indicating the detection area of the radiation detector are superimposed on the displayed captured image.

  Thus, in order to display the detection region of the radiation detector on the captured image, it is necessary to detect the position of the radiation detector. For this reason, the position of the radiation detector is detected using a marker, an RF signal, or a combination of a reflective element and light or electromagnetic signal, and the detection region of the radiation detector is superimposed on the captured image based on the detected position. A display method has been proposed (see Patent Document 4).

  By the way, the radiation detector is relatively expensive. For this reason, when imaging is performed around a plurality of hospital rooms, a radiation detector is not prepared for each patient room, but is carried to the patient room together with the radiation irradiation device and used for acquisition of radiographic images. Each room has a console for controlling radiographing for each room, and a radiation detector to be used is registered in the console. On the other hand, unique identification information is given to the radiation detector, and the identification information of the radiation detector used at the time of imaging is input to the console. The console uses the identification information to determine whether the radiation detector to be used is a registered radiation detector. When it is confirmed that the radiation detector to be used is a registered radiation detector, wireless or wired communication is performed between the radiation detector and the console to exchange radiation images and various types of information. Is done. In this case, the identification information is input by connecting the console and the radiation detector with a cable and transmitting the identification information of the radiation detector to the console, or the operator directly inputting the identification information of the radiation detector to the console. Or by inputting identification information to the console using a remote controller or the like.

JP 2009-131323 A JP 2007-029353 A JP 2010-119485 A Special table 2013-524477 gazette

  However, the operation of connecting the radiation detector and the console as described above or inputting the identification information of the radiation detector to the console every time the image is taken is very troublesome.

  The present invention has been made in view of the above circumstances, and in the radiographic imaging apparatus, and the control method and program for the radiographic imaging apparatus, it is possible to easily input identification information of a radiation detector. Objective.

A radiographic imaging device according to the present invention includes a radiation source for irradiating a subject with radiation,
Imaging means for imaging the subject and obtaining a captured image of the subject;
A radiation detector for detecting radiation transmitted through a subject to generate a radiation image of the subject, wherein the radiation detection surface side is provided with a marker representing identification information for identifying the radiation detector The marker is detected from the photographed image, and when the marker is detected, an identification information acquisition unit that acquires the identification information of the radiation detector from the marker is provided.

  The “photographed image of the subject” is an image that represents the surface of the subject and the surface of an object in the vicinity thereof within the imaging range of the imaging means. It should be noted that an infrared image representing the temperature distribution of the surface of the subject and the surface of the object around it obtained by imaging the subject using infrared rays is also included in the captured image of the subject.

  In the radiographic image capturing apparatus according to the present invention, the radiation source and the imaging unit may be provided integrally.

  “Integrally” means that the radiation source and the imaging means are provided so as to be integral with each other. For example, if the radiation source and the imaging means are provided in the same housing, the radiation The source and the photographing means are provided integrally.

  The radiographic imaging device according to the present invention may further include an identification unit that identifies the radiation detector based on the identification information.

  In the radiographic image capturing apparatus according to the present invention, the marker may be attached to a portion other than the detection region for detecting radiation on the detection surface side.

  The “part other than the detection area for detecting radiation on the detection surface side” can be a part of a frame around the detection area for detecting radiation in the radiation detector, for example.

  In the radiographic imaging device according to the present invention, the surface of the radiation detector that includes the detection region for detecting radiation forms a rectangle, and each of the plurality of markers has different sides on the surface including the detection region. And at least one of the vicinity of different corners.

  “Nearby” means being near at least one of a side and a corner of a rectangular surface including a detection region. Specifically, the marker may be in contact with at least one of the side and the corner, and may be separated from at least one of the side and the corner to such an extent that the detection of radiation on the surface including the detection region is not hindered.

  In the radiographic image capturing apparatus according to the present invention, the marker may be made of a barcode. The barcode may be one-dimensional or two-dimensional.

  In the radiographic imaging apparatus according to the present invention, the marker may represent color information that is different for each type of radiation detector as identification information.

  In the radiographic imaging apparatus according to the present invention, the marker may be a light emitting device, and the light emitting device may represent the identification information by at least one of a color of light emitted, a light lighting pattern, and a light blinking pattern.

  In the radiographic imaging device according to the present invention, the light emitting device further represents the detector information of the radiation detector by at least one of a color of emitted light, a light lighting pattern, and a light blinking pattern. Also good.

  In the radiographic imaging device according to the present invention, when a marker is detected, the relative positional relationship between the radiation detector and the radiation source is acquired based on at least one of the size and shape of the marker in the captured image. It is good also as what further has the positional relationship acquisition means to do.

  Moreover, in the radiographic imaging device by this invention, the other marker showing that it is a surface on the opposite side to a detection surface is provided in the surface side on the opposite side to the radiation detection surface of a radiation detector. It may be a thing.

A method of controlling a radiographic imaging apparatus according to the present invention includes a radiation source that irradiates a subject with radiation,
A radiographic imaging apparatus control method comprising imaging means for imaging a subject and acquiring a captured image of the subject,
A radiation detector that detects radiation transmitted through the subject and generates a radiation image of the subject, and detects a marker representing identification information for identifying the radiation detector on the radiation detection surface side from the captured image,
When the marker is detected, identification information of the radiation detector is obtained from the marker.

  In addition, you may provide as a program for making a computer perform the control method of the radiographic imaging apparatus by this invention.

  According to the present invention, when a marker of a radiation detector is detected from a captured image and the marker is detected, identification information of the radiation detector is acquired from the marker. For this reason, the identification information of the radiation detector can be input to the console or the like only by imaging the radiation detector by the imaging means. Therefore, it is possible to reduce the burden of the operation of inputting the identification information of the radiation detector to the console by the operator.

Schematic of a radiographic imaging device according to an embodiment of the present invention Front perspective view of radiation irradiation device Rear perspective view of radiation irradiation device Schematic block diagram showing the internal configuration of the radiation irradiation device External perspective view of the radiation detector as seen from the front on the radiation side Schematic block diagram showing the internal configuration of the radiation detector External perspective view of a radiation detector provided with LEDs as markers as seen from the front side on the radiation irradiation side Schematic block diagram showing the internal configuration of the console Diagram showing a captured image that includes only the subject The figure which shows the picked-up image in which a part of the radiation detector is included in addition to the subject A flowchart showing processing performed in the present embodiment A flowchart showing processing performed in the present embodiment The figure which shows the change of the irradiation field according to the body thickness of the subject The figure which shows the picked-up picture where various information is superimposed The figure for demonstrating acquisition of radiation detector position information based on movement information The figure which shows the picked-up image on which the information showing the direction where a radiation detector exists was superimposed. The figure which shows the state which made the center position of an irradiation field area | region correspond with the center position of a detection area | region The figure which shows the state which made the irradiation field field and detection field correspond Illustration showing icons such as thin person, normal figure person, fat person, etc. Schematic block diagram showing another example of the internal configuration of the radiation irradiation apparatus Diagram showing a distorted marker External perspective view of the radiation detector as seen from the back The perspective view which shows the whole shape of the radiation irradiation apparatus made to run Side view showing the state when using a radiation irradiation device that can be run

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic view of a radiographic imaging apparatus according to an embodiment of the present invention. As shown in FIG. 1, the radiographic imaging apparatus 1 according to the present embodiment includes a portable radiation irradiation apparatus 10, a radiation detector 30, and a console 50. Then, in order to acquire a radiographic image of the subject H sleeping on the bed 2, the radiation detector 30 is inserted between the subject H and the bed 2, and the portable radiation irradiation apparatus 10 moves to the subject H. The radiation detector 30 emits radiation, and the radiation detector 30 acquires a radiation image of the subject H. The console 50 is connected to a terminal 80 such as a doctor via a network.

  2 is a front perspective view of the radiation irradiation apparatus, FIG. 3 is a rear perspective view of the radiation irradiation apparatus, and FIG. 4 is a schematic block diagram showing an internal configuration of the radiation irradiation apparatus. As shown in the figure, the radiation irradiation apparatus 10 is provided with an exit window 12 from which radiation is emitted, a camera 13 for photographing the surface of the subject H, and a distance sensor 27 on the front surface of a rectangular parallelepiped housing 11. ing. A collimator 14 for narrowing the radiation irradiation range is visible from the exit window 12. A monitor 15 made of liquid crystal or the like is provided on the rear surface of the housing 11. On the monitor 15, a captured image acquired by the camera 13 capturing an image of the surface of the subject H, a radiation image of the subject H, various information for setting the radiation irradiation apparatus 10, and the like are displayed. The distance sensor 27 measures the distance between the apparatus 10 and the object by laser or ultrasonic waves. The camera 13 and the monitor 15 correspond to an imaging unit and a display unit, respectively.

  Grip portions 16 and 17 are attached to both side surfaces of the housing 11, respectively. The gripping part 16 includes two projecting parts 16A that project laterally from the upper part and the lower part of the side surface of the housing 11, and a connection part 16B that connects the two projecting parts 16A. The gripping portion 17 includes two projecting portions 17A that project laterally from the upper and lower sides of the side surface of the housing 11, and a connecting portion 17B that connects the two projecting portions 17A. The protruding portions 16A and 17A are curved from the protruding positions 11A and 11B toward the rear surface of the housing 11. Instead of bending, the protrusions 16A and 17A may be inclined from the protrusion positions 11A and 11B toward the rear surface of the housing 11. By holding the grip portions 16 and 17, the operator can move the radiation irradiation apparatus 10 to a position where the subject H can be imaged. Note that an imaging button 18 for imaging the subject H by emitting radiation is provided on the protruding portion 17A on the upper side of the gripping portion 17 that the operator holds with the right hand when imaging. .

  The housing 11 includes a monitor 15, a radiation source 19, an irradiation control unit 20, a collimator control unit 21, an imaging control unit 22, a drive control unit 23, an input unit 24, a communication unit 25, a battery 26, a distance sensor 27, and a motion sensor. 28 and an irradiation field lamp 29 are accommodated. Thereby, the radiation source 19 and the camera 13 which is an imaging means are provided integrally. The irradiation control unit 20, the collimator control unit 21, the imaging control unit 22, the drive control unit 23, and the communication unit 25 are configured by a program (software) that operates on a computer, dedicated hardware, or a combination of both. . The program is recorded and distributed on a recording medium such as a DVD (Digital Versatile Disc) or a CD-ROM (Compact Disk Read Only Memory), and is installed in the radiation irradiation apparatus 10 from the recording medium. Alternatively, it is stored in a storage device of a server computer connected to a network or in a network storage in a state where it can be accessed from the outside, and is downloaded to the radiation irradiation apparatus 10 and installed on demand.

  The radiation source 19 includes, for example, an X-ray tube, a booster circuit, and a cooling unit that cools the X-ray tube.

  The irradiation control unit 20 drives the radiation source 19 to irradiate the subject H with radiation having intensity corresponding to preset imaging conditions so that the subject H is irradiated for a set time. Control the amount. The imaging conditions are a tube voltage (kV value) and a mAs value (tube current × irradiation time) corresponding to the body thickness of the subject H. The body thickness of the subject H is the SID (Source Image receptor Distance) that is the distance between the device 10 and the surface of the radiation detector 30 and the distance between the device 10 and the surface of the subject H by the distance sensor 27. It can be obtained by measuring SOD (Source Object Distance) and subtracting SOD from SID. Note that the operator may measure the body thickness, and input information for setting imaging conditions including the measured body thickness from the input unit 24 to the apparatus 10. In the present embodiment, information for setting such imaging conditions such as body thickness is transmitted to the console 50, the imaging conditions are set in the console 50, and the set imaging conditions are transmitted to the radiation irradiation apparatus 10. The The irradiation control unit 20 controls the irradiation of the subject H with radiation using the imaging conditions transmitted from the console 50.

  The collimator control unit 21 includes a drive mechanism such as a motor and an electric circuit for controlling the drive mechanism for changing the radiation field of radiation irradiated from the radiation source 19 to the subject H by driving the collimator 14. ing. The collimator control unit 21 controls driving of the collimator 14 in accordance with an instruction from the drive control unit 23.

  The imaging control unit 22 drives the camera 13 to image the surface of the subject H and obtains a captured image G1. Further, the shooting control unit 22 may perform image processing for improving the image quality on the shot image G1 acquired by the camera 13. The captured image G1 acquired by the camera 13 is a moving image having a predetermined frame rate of, for example, 30 fps.

  The drive control unit 23 controls the entire drive of the radiation irradiation apparatus 10. That is, the drive control unit 23 instructs the irradiation control unit 20 to drive the radiation source 19, instructs the collimator control unit 21 to process the collimator 14, and instructs the imaging control unit 22. A process of driving the camera 13 to acquire the captured image G1, a process of displaying various information including the captured image G1 on the monitor 15, a process of instructing the communication unit 25 to exchange various information with the console 50, a battery 26 A process for monitoring the state, a process for receiving an instruction from the input unit 24, a process for measuring the distance between the radiation irradiation apparatus 10 and the object by the distance sensor 27, and a process for detecting the movement of the radiation irradiation apparatus 10 by the motion sensor 28. Etc. Each process described above is performed according to an instruction from the input unit 24 or an instruction transmitted from the console 50 and received by the communication unit 25.

  The input unit 24 is a touch panel type input unit integrated with the monitor 15, receives an instruction from the operator, and outputs information representing the instruction to the drive control unit 23. Note that the photographing button 18 is also included in the input unit 24.

  The communication unit 25 communicates with the console 50 wirelessly to exchange information. In addition, it may replace with radio | wireless and the radiation irradiation apparatus 10 and the console 50 may be connected by a cable, and information may be exchanged by wire. In the latter case, the communication unit 25 has a connector to which a cable is connected.

  The motion sensor 28 is a 9-axis motion sensor that detects 3-axis acceleration, 3-axis angular velocity, and 3-axis tilt. The acceleration, angular velocity, and inclination detected by the motion sensor 28 are output to the drive control unit 23 as motion information, used for controlling the radiation irradiation apparatus 10 during imaging, and transmitted from the communication unit 25 to the console 50. Note that the inclination is determined with reference to the position where the radiation irradiation apparatus 10 is held horizontally in a state where the radiation irradiation axis, which is the axis that coincides with the radiation irradiation direction, coincides with the direction in which gravity acts.

  The irradiation field lamp 29 is formed of a light emitting element that emits visible light such as a light bulb or an LED (Light Emitting Diode), and is turned on and off by the drive control unit 23. When the irradiation field lamp 29 is turned on, visible light is irradiated to the irradiation field irradiated with radiation on the subject H.

  Next, the configuration of the radiation detector 30 will be described. FIG. 5 is an external perspective view of the radiation detector as seen from the front side on the radiation irradiation side, and FIG. 6 is a schematic block diagram showing the internal configuration of the radiation detector.

  As shown in FIG. 5, the radiation detector 30 is a rectangular cassette-type radiation detector including a housing 32 that houses the image detection unit 31. As is well known, the image detection unit 31 includes a scintillator (phosphor) that converts incident radiation into visible light, and a TFT (Thin Film Transistor) active matrix substrate. On the TFT active matrix substrate, a rectangular imaging region in which a plurality of pixels for accumulating charges corresponding to visible light from the scintillator is arranged is formed. In the case 32, in addition to the image detection unit 31, a gate driver that applies a gate pulse to the gate of the TFT to switch the TFT, and charges accumulated in the pixel are converted into an analog electric signal representing an X-ray image. A shooting control unit 35 and the like having a signal processing circuit and the like for output are incorporated.

  The casing 32 has a rectangular parallelepiped shape including a front surface 32A on the detection surface side on which radiation is incident, a back surface 32B facing the front surface 32A, and four side surfaces 32C, 32D, 32E, and 32F. The housing 32 is formed of, for example, a conductive resin, and also functions as an electromagnetic shield that prevents electromagnetic noise from entering the radiation detector 30 and radiating electromagnetic noise from the radiation detector 30 to the outside. The housing 32 has a size conforming to an international standard ISO (International Organization for Standardization) 4090: 2001, which is almost the same as, for example, a film cassette, an IP (Imaging Plate) cassette, or a CR (Computed Radiography) cassette.

  A transmission plate 33 that transmits radiation is attached to the front surface 32 </ b> A of the housing 32. The transmission plate 33 is substantially the same size as the detection region for detecting radiation in the radiation detector 30, and is made of a carbon material that is lightweight, has high rigidity, and has high radiation transparency.

  Markers 34 </ b> A to 34 </ b> D representing identification information for identifying the radiation detector 30 are attached to the four corners of the front surface 32 </ b> A of the housing 32. Here, as the identification information, information representing at least one of an ID number for identifying the individual radiation detector 30, a manufacturing number, and the size or type of the radiation detector 30 can be used. In the present embodiment, the markers 34A to 34D are each composed of two one-dimensional barcodes that are orthogonal to each other. The two barcodes are attached to portions other than the detection region on the front surface 32 </ b> A of the radiation detector 30 so as to define the four corners of the radiation detection region in the radiation detector 30. Thereby, each of the markers 34 </ b> A to 34 </ b> D is provided in the vicinity of a different corner on the surface including the detection region of the radiation detector 30. As long as the radiation detector 30 can be identified, a marker that represents different color information as identification information for each type of radiation detector may be used. For example, a tape or the like provided with a color unique to the radiation detector 30 may be used as the marker. In this case, the radiation detector 30 can be identified by the color of the marker.

  Here, the markers 34 </ b> A to 34 </ b> D are configured by a pair of two barcodes. In the present embodiment, one of the two barcodes is accommodated in the radiation detector 30. Information indicating the vertical direction of the image detection unit 31 is included. In the present embodiment, the side to which the markers 34A and 34B are provided is the top, that is, the top side. Therefore, in this embodiment, in the radiation detector 30, when the side on which the markers 34A and 34B are provided and the side on which the markers 34C and 34D are provided are defined, they are orthogonal to these two sides. The direction from the side on which the markers 34C and 34D are provided to the side on which the markers 34A and 34B are provided is the top-to-bottom direction. The top-and-bottom direction means a direction on the radiation detector 30 and does not mean a direction in a direction in which gravity acts.

  In addition, you may use light emitting elements, such as LED which light-emits the color intrinsic | native to the radiation detector 30, as a marker. In this case, the radiation detector 30 can be identified by the color of the light emitting element. Further, as shown in FIG. 7, by providing markers 40 </ b> A to 40 </ b> D made of a plurality of light emitting elements at the four corners of the detection region of the radiation detector 30, the lighting pattern of the light emitting element, the blinking pattern, and the color of the emitted light The radiation detector 30 can be identified by at least one of the following. Note that the light-emitting element corresponds to a light-emitting device.

  Further, the marker is not limited to the barcode or the light emitting element, and it is sufficient that at least the position of the marker in the captured image G1 can be detected. For example, a symbol or a character may be used as the marker.

  The housing 32 accommodates an image detection unit 31, an imaging control unit 35, a drive control unit 36, a communication unit 37, a motion sensor 38, and a battery 39. The photographing control unit 35, the drive control unit 36, and the communication unit 37 are configured by a program (software) that operates on a computer, dedicated hardware, or a combination of both. The program is installed in the radiation detector 30 in the same manner as the radiation irradiation apparatus 10.

  As described above, the imaging control unit 35 includes a gate driver, a signal processing circuit, and the like, controls the driving thereof, generates an analog image signal representing the radiation image G2, and outputs the analog image signal to the driving control unit 36.

  The drive control unit 36 controls the entire drive of the radiation detector 30. That is, the drive control unit 36 instructs the imaging control unit 35 to generate an image signal representing the radiation image G2, and instructs the communication unit 37 to send the image signal representing the radiation image G2 and various information to the console 50. , A process for detecting the movement of the radiation detector 30 by the motion sensor 38, a process for monitoring the state of the battery 39, and the like.

  The communication unit 37 communicates with the console 50 wirelessly to exchange information. Instead of wireless, the radiation detector 30 and the console 50 may be connected by a cable, and information may be exchanged by wire. In the latter case, the communication unit 37 has a connector to which a cable is connected.

  The motion sensor 38 is a 9-axis motion sensor that detects 3-axis acceleration, 3-axis angular velocity, and 3-axis tilt. The acceleration, angular velocity, and inclination detected by the motion sensor 38 are output as motion information to the drive control unit 36 and transmitted from the communication unit 37 to the console 50. The inclination is an inclination based on the position where the radiation detector 30 is held horizontally.

  FIG. 8 is a schematic block diagram showing the internal configuration of the console. As shown in FIG. 8, the console 50 includes a radiation imaging data processing unit 51, an image processing unit 52, an output unit 54, a storage unit 55, an input unit 56, a communication unit 57, a monitor 58, and a control unit 59. The radiation imaging data processing unit 51, the image processing unit 52, the communication unit 57, and the control unit 59 are configured by a program (software) that operates on a computer, dedicated hardware, or a combination of both. The program is installed in the console 50 in the same manner as the radiation irradiation apparatus 10 described above.

  The radiographic data processing unit 51 performs data processing such as A / D conversion on the image signal representing the radiographic image G2 of the subject H input from the radiation detector 30. From the radiation imaging data processing unit 51, radiation image data representing the digital radiation image G2 after data processing is output.

  The image processing unit 52 performs predetermined image processing on the radiation image data output from the radiation imaging data processing unit 51 using the image processing parameters stored in the storage unit 55. Image processing performed by the image processing unit 52 includes, for example, image calibration including pixel defect correction, creation of a defect map for performing this, offset correction, gain correction using a predetermined uniform exposure image, and shading correction. Correction of radiographic image data by the image data), gradation correction processing, density correction processing, processing for removing scattered radiation caused by radiation transmitted through the subject H, and data for monitor display and print output Various image processing such as data conversion for converting data can be performed. The image processing unit 52 outputs radiographic image data that has undergone image processing.

  The output unit 54 outputs the radiographic image data that has been subjected to the image processing and is input from the image processing unit 52. The output unit 54 is, for example, a printer that prints out radiation images, or a storage device that stores radiation image data.

  The storage unit 55 stores the size of the detection region of the radiation detector 30, the image processing parameters for image processing performed in the image processing unit 52, the type of the radiation detector 30 for setting imaging conditions, and the body thickness of the subject H. And the like, and various information necessary for processing in the console 50, and the radiographic image G2 output from the image processing unit 52 and the captured image G1 transmitted from the radiation irradiation apparatus 10 are stored. The storage unit 55 may be a semiconductor memory or a recording medium such as a hard disk. Further, it may be built in the console 50, or may be arranged outside and used by being connected to the console 50.

  The input unit 56 includes a keyboard or the like for performing various inputs to the console 50. The input unit 56 may be a touch panel.

  The communication unit 57 communicates with the radiation irradiation apparatus 10 and the radiation detector 30 wirelessly to exchange information. Instead of wireless, the console 50, the radiation irradiation apparatus 10, and the radiation detector 30 may be connected by a cable, and information may be exchanged by wire. In the latter case, the communication unit 57 has a connector to which a cable is connected.

  The monitor 58 is composed of a liquid crystal panel or the like, and displays various information regarding the console 50, the radiation image G2 transmitted from the radiation detector 30, and the captured image G1 if necessary.

  The control unit 59 controls the entire drive of the console 50. That is, the control unit 59 instructs the radiation imaging data processing unit 51 to acquire the radiation image G2, performs processing to instruct the image processing unit 52 to perform image processing on the radiation image G2, and detects the detected markers 34A to 34A. The process of acquiring the identification information of the radiation detector 30 from any of 34D, the process of identifying the radiation detector 30 based on the identification information, the process of detecting the position of the radiation detector in the captured image G1, and the output unit 54 A process for outputting the radiation image G2, a process for instructing the communication unit 57 to exchange various information with the radiation irradiating apparatus 10 and the radiation detector 30, a process for receiving an instruction from the input unit 56, and a variety of information on the monitor 58. Processing to display is performed. The control unit 59 corresponds to an identification information acquisition unit and an identification unit.

  Hereinafter, detection of the radiation detector 30 in the captured image G1 will be described. When acquiring a radiographic image of the subject H, the operator points the radiation irradiation device 10 at the subject H and images the subject H with the camera 13. In the present embodiment, the chest of the subject H is imaged. For this reason, before imaging, the captured image G1 includes the chest of the subject H as shown in FIG. Then, when the operation of inserting the radiation detector 30 between the bed 2 and the subject H is performed in order to acquire the radiation image G2 of the subject H, as shown in FIG. A part of the radiation detector 30 is included. Here, the radiation detector 30 is provided with markers 34A to 34D at the four corners. The control unit 59 detects any of the markers 34A to 34D from the captured image G1, and determines that the radiation detector 30 is included in the captured image G1 when any of the markers 34A to 34D is detected from the captured image G1. To do.

  On the other hand, the control unit 59 transmits radiation detector position information indicating the position of the radiation detector 30 in the captured image G <b> 1 from the communication unit 57 to the radiation irradiation apparatus 10. The radiation detector position information is a coordinate position representing the position of the corner of the detection region of the radiation detector 30 on the captured image G1. In the present embodiment, the size of the detection area of the radiation detector 30 is stored in the storage unit 55 in advance. The control unit 59 obtains radiation detector position information from the position of any of the markers 34A to 34D detected from the captured image G1 and the size of the detection area. Further, if the radiation detector position information is known, the information on the center position of the radiation detector 30 can be calculated from the size of the detection region of the radiation detector 30. Therefore, the control unit 59 also transmits center position information indicating the center position of the radiation detector 30 to the radiation irradiation apparatus 10. Further, the vertical direction of the radiation detector 30 is recognized from any of the markers 34 </ b> A to 34 </ b> D, and information on the vertical direction is also transmitted to the radiation irradiation apparatus 10.

  Further, when any of the markers 34A to 34D is detected from the captured image G1, the control unit 59 acquires the identification information of the radiation detector 30 from any of the markers 34A to 34D. Moreover, the control part 59 identifies a radiation detector using identification information. Specifically, it is determined whether or not the radiation detector 30 is a radiation detector to be used. Here, the type of radiation detector to be used is registered in the console 50 in advance. That is, the identification information of the radiation detector to be used is stored in the storage unit 55 as registered identification information. The control unit 59 compares the identification information of the radiation detector 30 with the registered identification information stored in the storage unit 55, and determines whether or not the acquired identification information is registered identification information. If this determination is positive, the control unit 59 transmits identification information to the radiation irradiation apparatus 10. In the radiation irradiation apparatus 10, identification information is displayed on the monitor 15 as described later. On the other hand, if the determination is negative, the control unit 59 transmits information indicating that the radiation detector 30 is not a radiation detector to be used to the radiation irradiation apparatus 10. The radiation irradiation apparatus 10 issues a warning that the radiation detector 30 is not a radiation detector to be used. Specifically, text or the like indicating that the radiation detector 30 is not a radiation detector to be used is displayed on the monitor 15. As a result, the operator can take measures such as replacing the radiation detector. Further, in the console 50, the identification information of the radiation detector 30 currently used may be registered again. Thereby, the operation | work which replaces the radiation detector 30 can be abbreviate | omitted.

  Next, processing performed in the present embodiment will be described. 11 and 12 are flowcharts showing processing performed in the present embodiment. In the radiographic imaging apparatus of the present embodiment, two operators handle the radiation irradiation apparatus 10 and the radiation detector 30, respectively, and position the radiation detector 30 behind the subject H, or the irradiation field. It is assumed that a pre-shooting operation for setting the camera is performed, and shooting is performed after the pre-shooting operation is completed. First, the radiation irradiation apparatus 10 is set above the subject H, the subject H is photographed by the camera 13, and a photographed image G1 of the subject H is acquired (step ST1). The radiation irradiating apparatus 10 transmits information of the irradiation field defined by the captured image G1, SID, SOD, and collimator 14 to the console 50 (transmission of captured image, etc .: step ST2). Further, the console 50 transmits information representing the driving status of the radiation detector 30, information representing the remaining battery level of the radiation detector 30, motion information detected by the motion sensor 38, and the like from the radiation detector 30. (Detector information transmission: step ST3).

  The control unit 59 of the console 50 determines whether the radiation detector 30 is included in the captured image G1 by detecting any of the markers 34A to 34D from the captured image G1 (step ST4). As shown in FIG. 9, when none of the markers 34A to 34D is detected from the captured image G1, and as a result, the radiation detector 30 is not included in the captured image G1, Step ST4 is denied and the process returns to Step ST1. . As shown in FIG. 10, when any of the markers 34A to 34D is detected from the captured image G1, and as a result, the radiation detector 30 is included in the captured image G1, step ST4 is affirmed, and the control unit 59 Radiation detector position information representing the position of the radiation detector 30 on the captured image G1 including identification information of the radiation detector 30 based on any of the markers 34A to 34D of the radiation detector 30 included in the captured image G1. Then, information related to the detector including the information indicating the vertical direction of the radiation detector 30 and the center position information of the radiation detector 30 is acquired (step ST5).

  The control unit 59 identifies the radiation detector 30 by determining whether or not the acquired identification information is identification information of the radiation detector to be used (step ST6). When the acquired identification information is not the identification information of the radiation detector to be used (step ST6: No), the control unit 59 transmits information to the radiation irradiation apparatus 10 that the radiation detector 30 is not the radiation detector to be used. . The radiation irradiation apparatus 10 gives a warning that the radiation detector 30 is not a radiation detector to be used (step ST7). When the acquired identification information is the identification information of the radiation detector to be used (step ST6: Yes), the process proceeds to step ST8.

  On the other hand, the control unit 59 calculates the body thickness of the subject H by subtracting the SOD from the SID, and sets the imaging condition from the body thickness. Note that the imaging conditions may be set according to the part of the subject H included in the captured image G1. Information on the part of the subject H may be acquired by receiving input from the operator in the radiation irradiation apparatus 10 or may be acquired by receiving input from the input unit 56 of the console 50. Moreover, the scintillator used for the image detection part 31 accommodated in the radiation detector 30 has the radiation quality (whether it is a high voltage | pressure or a low voltage | pressure) suitable for the kind. For this reason, you may set imaging conditions according to the material of the scintillator used for the image detection part 31 accommodated in the radiation detector 30 in addition to body thickness. In this case, a table in which the scintillator information used in the image detection unit 31 and the imaging conditions corresponding to the identification information of the radiation detector 30 are stored in the storage unit 55. Thereby, the imaging condition according to the identification information of the radiation detector 30 acquired from the captured image G1 with reference to the table can be set. In addition, in the case where imaging information when the same subject H is imaged using the same radiation irradiation device 10 and radiation detector 30, imaging conditions that take that into consideration may be set. .

  Here, as shown in FIG. 13, the size of the irradiation field of the radiation irradiated from the radiation irradiation apparatus 10 differs depending on whether the body thickness of the subject H is large or small. Specifically, the smaller the body thickness, the larger the irradiation field. For this reason, the control unit 59 calculates the body thickness of the subject H from the SID and SOD, and further, based on the information on the range defined by the collimator 14 transmitted from the radiation irradiation apparatus 10, the center position of the irradiation field region And information related to the irradiation field consisting of size information. And the control part 59 transmits detector information, detector relevant information, irradiation field relevant information, and imaging conditions to the radiation irradiation apparatus 10 (information transmission: step ST8). As described above, the identification information is transmitted when the acquired identification information is the identification information of the radiation detector to be used.

  Based on the information transmitted from the console 50, the drive control unit 23 of the radiation irradiation apparatus 10 adds the identification information of the radiation detector 30, the driving status of the radiation detector 30, to the captured image G1 displayed on the monitor 15. The vertical direction of the radiation detector 30, the remaining battery level of the radiation detector 30, the area corresponding to the radiation detector 30, the center position of the radiation detector 30, and the radiation field regulated by the collimator 14 are superimposed and displayed ( Information display: Step ST9).

  FIG. 14 is a diagram showing a captured image G1 on which various types of information are superimposed. As shown in FIG. 14, the captured image G1 displayed on the monitor 15 includes text 60 (here, “standby”) that indicates the driving state of the radiation detector 30, an arrow 61 that indicates the vertical direction of the radiation detector 30, An icon 62 representing the remaining battery level of the radiation detector 30, a detection area 63 corresponding to the detection area of the radiation detector 30, a center position 64 of the radiation detector 30, an irradiation field area 65, a center position 66 of the irradiation field area 65, The text 70 of Detector 1 that is identification information of the radiation detector 30 is superimposed and displayed. In the irradiation field area 65, the center position 66 of the irradiation field is also displayed. In addition, it is preferable to display the detection area 63 and the irradiation field area 65 in an identifiable manner. For example, the color of the detection area 63 and the color of the irradiation field area 65 are preferably different. The color may be specified by an instruction from the console 50.

  Here, in the present embodiment, since markers are attached to the four corners of the radiation detector 30, even if a part of the radiation detector 30 is hidden behind the subject H as shown in FIG. One of the markers is included in the image G1.

  In the console 50, the control unit 59 detects the color of the clothing of the subject H from the captured image G1, and designates the colors of the detection region 63 and the irradiation field region 65 so as to be different from the color of the clothing. Is preferred. Thereby, it can prevent that the detection area | region 63 and the irradiation field area | region 65 which are superimposed on the picked-up image G1 are mixed with the clothing of the subject H.

  Then, the subject H is continuously photographed by the camera 13 of the radiation irradiation apparatus 10 to obtain a photographed image G1 of the subject H, and the radiation irradiation apparatus 10 transmits the photographed image G1 to the console 50 (transmission of photographed image: step). ST10). The radiation detector 30 continuously transmits information indicating the driving state of the radiation detector 30, information indicating the remaining battery level of the radiation detector 30, motion information detected by the motion sensor 38, and the like.

  The control unit 59 of the console 50 continuously determines whether or not the radiation detector 30 is included in the captured image G1 by determining whether or not any of the markers 34A to 34D is included in the captured image G1 ( Step ST11). If step ST11 is affirmed, the control unit 59 continues to determine the position of the radiation detector 30 in the captured image G1 based on one of the markers 34A to 34D provided to the radiation detector 30 included in the captured image G1. The represented radiation detector position information is transmitted (step ST12). The drive control unit 23 of the radiation irradiation apparatus 10 superimposes and displays the detection region 63 of the radiation detector 30 on the captured image G1 based on the radiation detector position information transmitted from the console 50 (information display: step ST13).

  On the other hand, when the radiation detector 30 is moved after the radiation detector 30 is included in the photographed image G1, the radiation detector 30 moves to a position outside the angle of view of the camera 13, and the radiation image is detected in the photographed image G1. The container 30 may not be included. If the radiation detector 30 is completely hidden by the subject H, the captured image G1 does not include the radiation detector. In such a case, the markers 34A to 34D are not included in the captured image G1, and therefore the position of the radiation detector 30 cannot be specified only from the captured image G1. In this case, step ST11 is denied. If step ST11 is negative, the control unit 59 of the console 50 acquires radiation detector position information based on the movement information of the radiation detector 30 detected by the motion sensor 38 transmitted from the radiation detector 30. Then, it transmits to the radiation irradiation apparatus 10 (step ST14).

  FIG. 15 is a diagram for explaining acquisition of radiation detector position information based on motion information. In FIG. 15, the position of any of the markers 34A to 34D in the radiation detector 30 when any of the markers 34A to 34D of the radiation detector 30 is included in the captured image G1 is set as the reference position P1. Then, the movement amount M1 from the reference position P1 of the radiation detector 30 is calculated using the motion information and the size of the detection region of the radiation detector 30. Based on the calculated movement amount M1, radiation detector position information is acquired. Thereby, even if the radiation detector 30 is not included in the captured image G1, the position of the radiation detector 30 can be tracked. Therefore, as shown in FIG. 15, the detection region 63 and the center position 64 of the radiation detector 30 can be superimposed and displayed on the captured image G1.

  When it is determined that any of the markers 34A to 34D is included in the captured image G1, and it is determined that any of the markers 34A to 34D is not included in the captured image G1, that is, the radiation is included in the captured image G1. If the radiation detector 30 is not included in the captured image G1 after the detector 30 is included, the radiation detector 30 is used by using the radiation detector position information obtained based on the motion information of the radiation detector 30. Information indicating the direction in which the image exists may be displayed on the captured image G1. FIG. 16 is a diagram illustrating a captured image in which information representing the direction in which the radiation detector 30 exists is superimposed in addition to various information. In FIG. 16, the position where the radiation detector 30 exists is indicated by a virtual line. As shown in FIG. 16, the captured image G1 displayed on the monitor 15 has an arrow 67 as information indicating the direction in which the radiation detector 30 exists in addition to the information superimposed on the captured image G1 shown in FIG. 14. It is displayed. Instead of the arrow 67, characters such as up, down, left, and right may be information indicating the direction in which the radiation detector 30 exists.

  The operators of the radiation irradiation apparatus 10 and the radiation detector 30 perform pre-imaging work in cooperation. That is, the operator of the radiation detector 30 moves the radiation detector 30 to an appropriate position behind the subject H, and the operator of the radiation irradiating apparatus 10 appropriately observes the image displayed on the monitor 15. It is confirmed whether or not the radiation detector 30 has moved to the position. Moreover, the position of the radiation irradiation apparatus 10 is moved if necessary. With this operation, as shown in FIG. 17, the center position 66 of the irradiation field region 65 and the center position 64 of the detection region 63 can be matched.

  Further, the control unit 59 determines whether or not the center position of the radiation detector 30 coincides with the center position 66 of the irradiation field region 65. You may make it transmit to. When the radiation irradiation apparatus 10 receives the information indicating the match, the radiation irradiation apparatus 10 indicates to the monitor 15 that the center position is matched, such as a text “center position is matched” or a mark indicating that the center position is matched. indicate. FIG. 17 shows that the center positions coincide with each other by a star-shaped mark 68. Instead of displaying on the monitor 15, the operator is notified that the center position of the radiation detector 30 coincides with the center position 66 of the irradiation field region 65 by, for example, outputting by sound or blinking the monitor 15. If possible, any method may be used.

  Further, when the center position of the radiation detector 30 and the center position 66 of the irradiation field region 65 coincide with each other, the radiation irradiation apparatus 10 is based on the inclination information of the radiation detector 30 included in the movement information of the radiation detector 30. Information on the inclination of the radiation detector 30 with respect to the image may be displayed superimposed on the captured image G1. Here, the inclination of the radiation detector 30 with respect to the radiation irradiation apparatus 10 is a two-dimensional inclination with respect to a plane perpendicular to the radiation irradiation axis. When the x axis and the y axis are set on the plane of the radiation detector 30, the inclination is an inclination angle around each of the x axis and the y axis. In the control unit 59 of the console 50, when the center position of the radiation detector 30 coincides with the radiation irradiation axis, information on the inclination of the radiation detector 30 is acquired and transmitted to the radiation irradiation apparatus 10. When receiving the information on the inclination of the radiation detector 30, the radiation irradiation apparatus 10 displays the angles around the x axis and the y axis on the monitor 15. In FIG. 17, angle information 69 representing angles around the x-axis and the y-axis is displayed. Accordingly, the operator adjusts the inclination of the radiation detector 30 so that the angles around the x-axis and the y-axis of the radiation detector 30 are 0, so that the radiation irradiation axis and the radiation detector 30 intersect perpendicularly. be able to.

  Note that the control unit 59 calculates the relative inclination between the radiation irradiation apparatus 10 and the radiation detector 30 using the movement information of the radiation irradiation apparatus 10, and transmits the calculated relative inclination to the radiation irradiation apparatus 10. You may make it do. In this case, after fixing the radiation detector 30, the relative inclination of the radiation detector 30 with respect to the radiation irradiation apparatus 10 can be adjusted by adjusting the inclination of the radiation irradiation apparatus 10. When the radiation irradiation axis and the radiation detector 30 are perpendicular to each other, the color of the detection area 63 superimposed on the captured image G1 may be changed, or the detection area 63 may be blinked. Thereby, the operator can easily recognize that the radiation irradiation axis and the radiation detector 30 are vertical.

  Here, in the state shown in FIG. 17, since the irradiation field area 65 is larger than the detection area 63, the radiation that has not passed through the radiation detector 30 among the radiation that has passed through the subject H can be imaged. It can't be done and it becomes useless. Further, irradiating the subject H with such useless radiation increases the exposure amount of the subject H.

  For this reason, the operator of the radiation irradiation apparatus 10 uses the input unit 24 to instruct the irradiation field region 65 and the detection region 63 to coincide with each other. For this reason, the drive control part 23 of the radiation irradiation apparatus 10 determines whether there existed area | region coincidence instructions (step ST15). Note that the area matching instruction is an instruction for the operator to operate the irradiation field area 65 displayed on the monitor 15 with a finger or the like to match the irradiation field area 65 and the detection area 63 as shown in FIG.

  If step ST15 is negative, the process returns to step ST10. Thereby, the captured image G1 is continuously transmitted to the console 50, and the radiation detector position information is acquired in the console 50. If the movement of the radiation detector 30 is continued, any of the markers 34A to 34D in the captured image G1, that is, any of the markers 34A to 34D in the captured image G1 is determined again after it is determined that the radiation detector 30 is not included. That is, it may be determined that the radiation detector 30 is included. In this case, step ST11 is affirmed and radiation detector position information is acquired based on any of the markers 34A to 34D of the radiation detector 30 included in the captured image G1.

  Here, the collimator controller 21 may drive the collimator 14 in conjunction with the area matching instruction. However, when the collimator 14 is driven each time there is an instruction to match the irradiation field area 65 and the detection area 63, Power consumption increases. For this reason, in the present embodiment, when the input unit 24 receives an input indicating that the imaging field preparation is completed after the instruction to match the irradiation field region 65 and the detection region 63 using the input unit 24 is completed. In addition, the collimator 14 may be driven by the collimator controller 21.

  Further, when step ST15 is affirmed, the drive control unit 23 of the radiation irradiation apparatus 10 determines whether or not preparation for imaging is completed (step ST16). The completion of the preparation for photographing may be accepted by the input from the input unit 24 as described above. If step ST16 is negative, the process returns to step ST10.

  If step ST16 is positive, the drive control unit 23 turns on the irradiation field lamp 29, drives the collimator 14 by the collimator control unit 21, and sets the irradiation field (step ST17). At this time, it is preferable to notify the operator that the collimator 14 is being driven by blinking the irradiation field region 65 displayed on the monitor 15 or the like. The drive control unit 23 of the radiation irradiation apparatus 10 does not accept the operation of the imaging button 18 while the collimator 14 is being driven. When the driving of the collimator 14 is completed, the drive control unit 23 detects the movement of the radiation irradiation apparatus 10 by the motion sensor 28 and calculates the movement amount per unit time of the radiation irradiation apparatus 10 (step ST18). The amount of movement of the radiation irradiation apparatus 10 per unit time corresponds to the hand movement of the operator. The drive control unit 23 determines whether or not the amount of motion per unit time is less than the threshold value Th1 (step ST19). If step ST19 is negative, the drive control unit 23 displays a warning on the monitor 15 (step ST20) and returns to step ST18. The operator can take measures such as firmly holding the radiation irradiation apparatus 10 by warning display.

  If step ST19 is negative, the drive control unit 23 controls the radiation source 19 so as not to emit radiation even when the imaging button 18 is operated. Instead of this, the shooting button 18 may not be operated by locking the shooting button 18 or the like. Further, the threshold value Th1 may be changed according to the radiation irradiation time included in the imaging conditions. For example, when the irradiation time of radiation is long, the influence of camera shake becomes large. Therefore, the threshold value Th1 may be changed so as to decrease as the irradiation time of radiation increases.

  If step ST19 is affirmed, the drive control unit 23 determines whether or not an imaging instruction has been given from the input unit 24 (step ST21). If step ST21 is negative, the process returns to step ST18. When step ST21 is affirmed, the drive control unit 23 drives the radiation source 19 to emit radiation toward the subject H, thereby irradiating the subject H with radiation (step ST22). When step ST19 is affirmed, the drive control unit 23 may display on the monitor 15 that the photographing is possible. In addition, when it affirms after step ST19 is denied, the drive control part 23 stops the warning display to the monitor 15, and enables the radiation source 19 to be driven by operation of the imaging | photography button 18. FIG. If the shooting button 18 cannot be operated, the shooting button 18 can be operated by unlocking the shooting button 18 or the like.

  The radiation detector 30 detects the radiation that has passed through the subject H, and acquires a radiation image G2 of the subject H (step ST23). The acquired radiation image G <b> 2 is transmitted to the console 50, subjected to image processing for improving the image quality in the image processing unit 52, and output to the output unit 54. In addition, the control unit 59 transmits the image-processed radiation image G2 to the radiation irradiation apparatus 10 (step ST24).

  The drive control part 23 of the radiation irradiation apparatus 10 displays the radiation image G2 on the monitor 15 (step ST25), and complete | finishes a process. In this case, the captured image G1 and the radiation image G2 may be superimposed on the monitor 15 or only the radiation image G2 may be displayed. Thereby, it can be determined whether the radiographic image G2 was acquired appropriately.

  Thus, in this embodiment, when any of the markers 34A to 34D of the radiation detector 30 is detected from the captured image G1 and any of the markers 34A to 34D is detected, radiation detection is performed from the markers 34A to 34D. The identification information of the container 30 is obtained. Therefore, the radiation detector identification information can be input to the console 50 only by photographing the radiation detector 30 with the camera 13. Therefore, it is possible to reduce the burden of the operation of inputting the identification information of the radiation detector 30 to the console 50 by the operator.

  In the above embodiment, each of the plurality of markers is provided in the vicinity of a different corner in the radiation detector 30, but each of the plurality of markers is provided in the vicinity of a different side in the radiation detector 30. May be. In addition, each of the plurality of markers may be provided in the vicinity of different corners and in the vicinity of different sides in the radiation detector 30.

  Moreover, in the said embodiment, although the one-dimensional barcode is used as the markers 34A-34D, you may use a two-dimensional barcode.

  Moreover, in the said embodiment, although the process which acquires the identification information of the radiation detector 30 and the process which identifies the radiation detector 30 based on identification information are performed in the control part 59 of the console 50, these processes are performed. The processing may be performed in the radiation irradiation apparatus 10. In this case, these processes may be performed in the drive control unit 23, or a dedicated unit for performing these processes may be provided in the radiation irradiation apparatus 10.

  In the above embodiment, the SID and SOD are detected by the distance sensor 27 and the body thickness of the subject H is calculated from the SID and SOD. However, in the radiation irradiating apparatus 10, the operator uses the input unit 24. May input the body thickness of the subject H. In this case, the measured body thickness of the subject H may be input. However, as shown in FIG. 19, icons 90 such as a thin person, a normal body person, and a fat person are displayed on the monitor 15 and displayed. It is only necessary to accept input of body thickness by causing the operator to select one of the icons 90.

  In addition, since the radiation irradiation apparatus 10 according to the present embodiment is portable, radiation can be emitted in a direction in which the subject H is not present. In order to prevent such a situation, the drive control unit 23 controls the radiation source 19 so that radiation cannot be emitted in a state where the photographed image G1 does not include an object necessary for photographing such as the radiation detector 30. It is preferable to do.

  In the above-described embodiment, the SID and SOD are measured by the distance sensor 27 before the start of the pre-shooting work. However, the SID and SOD may be measured by the distance sensor 27 during the pre-shooting work. In this case, the position where the SID and SOD are measured may be designated on the monitor 15 and information on the position may be transmitted to the console 50. Thereby, in the console 50, it is possible to recognize which position the body thickness of the subject H is acquired.

  In the above embodiment, the imaging condition is set by the control unit 59 of the console 50. However, based on the information on the remaining amount of the battery 26 of the radiation irradiating apparatus 10, radiation can be emitted according to the set imaging condition. It may be determined whether or not there is. Then, when radiation irradiation according to the set imaging conditions is impossible, information to that effect may be transmitted to the radiation irradiation apparatus 10. In the radiation irradiation apparatus 10, the operator can recognize that the remaining amount of the battery 26 is insufficient by displaying information on the monitor 15 that the imaging is not possible. Therefore, the operator can take measures such as replacing the battery 26 or preparing another radiation irradiation apparatus 10.

  Moreover, in the said embodiment, the imaging | photography image G1, the identification information of the radiation detector 30, the radiation detector position information, the information and center position information indicating the top and bottom direction, and the information indicating the driving state of the radiation detector 30 from the console 50. The battery remaining amount information and the like may be transmitted to the terminal 80, and various information may be superimposed on the captured image G1 and displayed on the terminal 80 in the same manner as that displayed on the monitor 15. Thereby, a doctor or the like can monitor the state of the pre-imaging work of the subject H at his / her terminal 80.

  Moreover, in the said embodiment, the vertical direction of the radiation detector 30 may turn into the left-right direction of the picked-up image G1. Moreover, the top and bottom of the radiation detector 30 may be opposite to the top and bottom of the captured image G1. In such a case, since the acquired radiation image G2 does not coincide with the top and bottom of the captured image G1, if the acquired radiation image G2 is displayed as it is, the radiation image G2 becomes difficult to see. In this embodiment, since the top and bottom direction of the radiation detector 30 is detected in the console 50, the radiation image G2 can be rotated so that the top and bottom of the displayed radiation image G2 is correct. In this way, by rotating the radiation image G2 so that the top and bottom are correct, the top and bottom of the captured image G1 and the top and bottom of the radiation image G2 can be matched, and thus the displayed radiation image G2 can be easily viewed. it can.

  Moreover, in the said embodiment, the movement per unit time of the radiation irradiation apparatus 10 may become more than threshold value Th1 during radiation irradiation. In such a case, radiation emission is temporarily stopped, and when the movement of the radiation irradiation apparatus 10 per unit time becomes less than the threshold value Th1, radiation is emitted for the remaining radiation irradiation time. Also good. In this case, two radiographic images are acquired before and after the radiation emission is stopped, and the final radiographic image G2 may be generated by adding and synthesizing the two radiographic images in the console 50.

  In the above embodiment, the irradiation field lamp 29 is turned on when the preparation for photographing is completed. However, the irradiation field lamp 29 may be switched between on and off. For example, when acquiring the radiation image G2 of the animal's face, it is necessary to irradiate the animal's face with radiation. In such a case, when the irradiation field lamp 29 is turned on, the animal's face is irradiated with light, which may cause the animal to be exposed. For this reason, the control unit 59 of the console 50 determines the region of the subject H included in the captured image G1, and if the region is the face of an animal, the irradiation field lamp 29 is turned on also by an instruction to complete the preparation for imaging. It may not be turned on. Thereby, it is possible to prevent the animal from being surprised and exposed by the visible light emitted from the irradiation field lamp 29. Since the operator knows the site of the subject H, the irradiation field lamp 29 may be switched on or off according to an instruction from the input unit 24 by the operator.

  In the above embodiment, the amount of motion per unit time of the radiation irradiation apparatus 10 is calculated using the amount of motion detected by the motion sensor 28. Here, in the present embodiment, the captured image G1 is acquired at a predetermined frame rate. For this reason, the amount of motion per unit time of the radiation irradiation apparatus 10 may be calculated from two captured images acquired at different imaging timings and the imaging time difference between the two captured images.

  In the above embodiment, the captured image G1 is displayed so that the region corresponding to the radiation detector can be identified by superimposing the detection region 63 corresponding to the detection region of the radiation detector 30 on the captured image G1. However, by superimposing the region surrounded by the four side surfaces 32C, 32D, 32E, 32F of the housing 32 of the radiation detector 30 on the captured image G1, the captured image G1 can be identified so that the region corresponding to the radiation detector can be identified. It may be displayed.

  In the above embodiment, the camera 13 may be an infrared camera that can measure the temperature distribution of the shooting range using infrared rays, and an infrared image representing the temperature distribution of the shooting range may be used as the shot image G1. In this case, the captured image G1 acquired by the camera 13 represents the temperature distribution of the surface of the subject H and the surfaces of objects around it. By using the camera 13 that can acquire such an infrared image as the photographed image G1, even when the subject H is covered with a sheet or the like at a disaster site or the like, due to the temperature distribution represented by the photographed image G1, The position of the subject H can be specified on the captured image G1.

  When such an infrared camera is used, the marker is preferably made of a material that reflects infrared rays. For example, when the marker is a barcode, the marker may be configured by printing a barcode using a material that absorbs infrared rays as a material that reflects infrared rays. In addition, when a light emitting device such as an LED is used as a marker, a light emitting device that emits infrared light may be used.

  The camera 13 is preferably a camera that can switch between photographing with visible light and photographing with infrared rays. When such a camera 13 capable of switching between photographing with visible light and photographing with infrared rays is used, first, the subject H is photographed with infrared rays to obtain a photographed image G1 representing the temperature distribution, and the photographed image representing the temperature distribution. The irradiation field is first positioned using G1. Thereafter, the camera 13 is switched to imaging using visible light, and the detector region and the irradiation field region of the radiation detector 30 are superimposed on the captured image G1 in the same manner as in the above-described embodiment, and the captured image G1 is used to display the radiation detector 30. The radiation detector 30 may be positioned so that the detection area matches the irradiation field area. Thereby, even if the subject H is covered with a sheet or the like, the radiation image G2 can be acquired by matching the irradiation field region with the detection region of the radiation detector 30.

  In addition, by displaying the captured image G1 that is an infrared image on the monitor 15 in this manner, for example, abnormalities in the body temperature of the subject H such as heat stroke and accidental hypothermia can be recognized. Further, the radiographic image G2 acquired by imaging and the captured image G1 that is an infrared image may be displayed side by side on the monitor 15. Thereby, an infrared image and the radiographic image G2 can be contrasted. In particular, when treating abnormal body temperature before taking a radiographic image, it is possible to continue to check the progress of the treatment by continuously displaying the infrared image.

  In the above embodiment, the relative positional relationship between the radiation detector 30 and the camera 13 is acquired from at least one of the size and shape of any of the markers 34A to 34D detected from the captured image G1. It may be. In this case, as illustrated in FIG. 20, the radiation irradiation apparatus 10 uses the relative size between the radiation detector 30 and the camera 13 from at least one of the size and shape of any of the markers 34 </ b> A to 34 </ b> D detected from the captured image G <b> 1. The positional relationship acquisition part 42 which acquires a correct positional relationship is further provided. Here, using both the size and shape of any of the markers 34A to 34D detected from the captured image G1, the distance between the radiation detector 30 and the camera 13, that is, the radiation irradiation apparatus 10, and the radiation detector. The inclination of the radiation irradiation axis in the radiation irradiation apparatus 10 with respect to the axis perpendicular to the detection surface 30 is acquired as a positional relationship.

  Here, the size of the markers 34A to 34D included in the captured image G1 increases as the distance between the radiation detector 30 and the camera 13 decreases. For this reason, the positional relationship acquisition unit 42 detects the markers 34A to 34D from the captured image G1, and calculates the relative distance between the radiation detector 30 and the camera 13 from the detected size of the marker. Specifically, the relative distance between the radiation detector 30 and the camera 13 based on the difference in size between the reference marker imaged at a predetermined distance and the marker detected from the captured image G1. Is calculated.

  On the other hand, when the radiation irradiation axis in the radiation irradiation apparatus 10 is inclined with respect to the axis perpendicular to the detection surface of the radiation detector 30, as shown in FIG. 21, the bars of the markers 34A to 34D included in the captured image G1. The shape of the cord is distorted. Therefore, the positional relationship acquisition unit 42 detects the markers 34A to 34D from the captured image G1, and calculates the inclination of the radiation irradiation axis with respect to the axis perpendicular to the detection surface of the radiation detector 30 from the detected distortion of the marker shape. calculate. Specifically, based on the distortion of the shape of the marker detected from the captured image G1 with respect to the reference marker captured in a state where the radiation irradiation axis is perpendicular to the radiation detector 30, the radiation detector 30 The inclination of the radiation irradiation axis with respect to the axis perpendicular to the detection surface is calculated. At this time, it is preferable to enlarge the detected marker.

  The detected positional relationship is displayed on the monitor 15. The operator can change the distance between the radiation detector 30 and the radiation irradiation apparatus 10 by looking at the positional relationship displayed on the monitor 15. In addition, the inclination of the radiation irradiation axis with respect to the axis perpendicular to the detection surface of the radiation detector 30 can be adjusted.

  When the distance included in the detected positional relationship is larger than a predetermined threshold value, or when the inclination of the two axes is larger than a predetermined threshold value, a warning is given. May be performed. Specifically, the monitor 15 displays text or the like indicating that the distance included in the positional relationship is greater than a threshold value or that the inclinations of the two axes are greater than a predetermined threshold value. It may be displayed on.

  Moreover, in the said embodiment, you may provide the marker showing that it is a back surface to the back surface 32B of the radiation detector 30. FIG. FIG. 22 is an external perspective view of the radiation detector viewed from the back. As shown in FIG. 22, markers 43A to 43D different from the markers 34A to 34D are provided in the vicinity of the four side surfaces 32C, 32D, 32E, and 32F on the back surface 32B of the housing 32 of the radiation detector 30. Yes. The markers 43 </ b> A to 43 </ b> D include information indicating that it is the back surface 32 </ b> B of the radiation detector 30. In FIG. 22, the markers 43A to 43D are made of one-dimensional barcodes. However, if the markers 43A to 43D are the rear surface 32B, they are symbols, simple line segments, or colors that are not included in the front surface 32A. Also good. Moreover, the light emitting element showing that it is the back surface 32B may be sufficient. When the light emitting elements are used, the arrangement of the light emitting elements may be different between the front surface 32A and the back surface 32B, and the light emission color may be different between the front surface 32A and the back surface 32B.

  When the marker is detected from the captured image G1, if the detected marker is any of the markers 43A to 43D, the radiation detector 30 may be disposed with the back surface 32B facing the radiation irradiation device 10. You will understand. Accordingly, if the fact is displayed on the monitor 15, the operator can recognize that the radiation detector 30 has a different orientation, so that the front surface 32 </ b> A of the radiation detector 30 faces the radiation irradiation device 10. The radiation detector 30 can be re-installed.

  Moreover, in the said embodiment, when using a light emitting element as a marker, you may make it represent the detector information of the radiation detector 30 by at least one of the lighting pattern of a light emitting element, a blink pattern, and the color of the light to light-emit. . Here, as described above, the detector information includes information indicating the driving state of the radiation detector 30, information indicating the remaining battery level of the radiation detector 30, motion information detected by the motion sensor 38, and the like. In the radiation irradiation apparatus 10, various controls can be performed according to at least one of the lighting pattern of the light emitting element, the blinking pattern, and the color of the emitted light detected from the captured image G1.

  For example, when the color of the light emitting element represents the driving state of the radiation detector 30, the driving state of the radiation detector 30 can be identified by detecting the color of the light emitting element included in the captured image G1. Here, when the driving state of the radiation detector 30 is in the “power on” state, an instruction to change the driving state of the radiation detector 30 according to the state of operation of the radiation irradiation device 10 is given. To the radiation detector 30. For example, when the driving state of the radiation detector 30 is “power-on” and step ST19 shown in FIG. 12 is affirmed, the driving state of the radiation detector 30 is changed to “preparation for detection of radiation image”. An instruction to change to the “ready state”, which is a completed state, can be issued from the radiation irradiation apparatus 10 to the radiation detector 30. Thereby, the drive state of the radiation detector 30 can be changed to a ready state in which imaging can be performed immediately.

  Moreover, in the said embodiment, although the portable radiation irradiation apparatus 10 is used, the camera shake at the time of imaging | photography and exposure to an operator's hand etc. are prevented, and complicated sites, such as an emergency field and an intensive care unit, are prevented. You may use the radiation irradiation apparatus made to be able to run for the purpose of moving at a place. FIG. 23 is a perspective view showing the overall shape of the radiation irradiation apparatus that is allowed to travel, and FIG. 24 is a diagram illustrating a state in use of the radiation irradiation apparatus that is allowed to travel. The radiation irradiation apparatus 100 that can travel includes a leg part 110 that can travel on the apparatus mounting surface, a main body part 120 held on the leg part 110, and an arm part connected to the main body part 120. 130 and a radiation source part 140 attached to the tip of the arm part 130.

  The leg part 110 has four legs 111 and a wheel part 112 attached to the lower surface of the tip part of each leg 111. The wheel portion 112 is provided with a brake means (not shown).

  The main body 120 has an irradiation control unit 20, a collimator control unit 21, an imaging control unit 22, a drive control unit 23, the same as the radiation irradiation apparatus 10 in the above embodiment, in a housing 122 fixed on the base 121. The communication unit 25 and the battery 26 are accommodated. A handle 123 for pushing and pulling the radiation irradiation apparatus 100 is attached to the upper end of the housing 122. An operation unit 125 is attached to the upper part of the base 121.

  The operation unit 125 includes an input unit 126 such as operation buttons and switches for inputting signals or the like for instructing various operations of the radiation irradiation apparatus 100, a monitor 127 for displaying various information, and the like. Note that, similarly to the radiation irradiation apparatus 10 shown in the above embodiment, the input unit 126 may be configured from a touch panel.

  The arm unit 130 includes a plurality of members 131, 132, and 133 that have a nested structure. The member 132 and the member 133 are connected by a rotation holding mechanism 134, and the member 133 is turned in a direction in which the angle changes with respect to the member 132.

  The radiation source unit 140 is swingably attached to the tip of the member 133 of the arm unit 130. The radiation source unit 140 accommodates the camera 13, the collimator 14, the radiation source 19, the distance sensor 27, the motion sensor 28, and the irradiation field lamp 29 that are the same as those of the radiation irradiation apparatus 10 in the above embodiment. The oscillating position of the radiation source unit 140 that can be oscillated can be fixed by operating the lock lever 141.

  In such a radiation irradiation apparatus 100 that can travel, a captured image G1 of the subject acquired by the camera 13 is displayed on the monitor 127 of the operation unit 125.

  When performing the pre-imaging work, the operator extends the arm unit 130, and the length of the arm unit 130 and the radiation source unit 140 so that the radiation source unit 140 is positioned directly above the subject H above the subject H. Set the swing position. By photographing the subject H with the camera 13 in this state, the radiation detector 30 in the photographed image G1 is captured based on the markers 34A to 34D of the radiation detector 30 included in the photographed image G1 as in the above embodiment. The position can be specified.

  Further, when using the radiation irradiation apparatus 100 that can travel, the arm part 130 is expanded and contracted, the radiation source part 140 is swung so that the detection area and the irradiation field area superimposed on the radiation image G2 coincide. The driving of the collimator 14 may be controlled.

  Hereinafter, the operation and effect of the embodiment of the present invention will be described.

  A surface of the radiation detector, the surface including the detection region being rectangular, and each of the plurality of markers being attached to at least one of the vicinity of a different side and the vicinity of a different corner of the surface including the detection region By doing so, the possibility that all of the plurality of markers are hidden by the subject can be reduced. Therefore, the possibility that the marker is included in the captured image can be increased, and as a result, the identification information can be reliably acquired.

  By identifying the radiation detector based on the identification information, it is possible to prevent a mistake in the radiation detector to be used.

DESCRIPTION OF SYMBOLS 1 Radiographic imaging apparatus 10 Radiation irradiation apparatus 13 Camera 14 Collimator 15 Monitor 16, 17 Grasping part 19 Radiation source 20 Irradiation control part 21 Collimator control part 22 Imaging control part 23 Drive control part 24 Input part 25 Communication part 26 Battery 27 Distance sensor 28 Motion sensor 29 Irradiation field lamp 30 Radiation detector 31 Image detection unit 32 Housing 34A to 34D, 40A to 40D Marker 35 Imaging control unit 36 Drive control unit 37 Communication unit 38 Motion sensor 39 Battery 42 Positional relationship acquisition unit 50 Console 51 Radiation imaging data processing unit 52 Image processing unit 54 Output unit 55 Storage unit 56 Input unit 57 Communication unit 58 Monitor 59 Control unit

Claims (13)

A radiation source for irradiating the subject with radiation;
Imaging means for imaging the subject and obtaining a captured image of the subject;
A radiation detector that detects the radiation transmitted through the subject and generates a radiation image of the subject, and a marker representing identification information for identifying the radiation detector is attached to a detection surface side of the radiation. and comprising Te Radiation detector,
Radiation comprising: identification information acquisition means for detecting the marker of the radiation detector from the captured image and acquiring identification information of the radiation detector from the marker when the marker is detected. Image shooting device.   The radiographic imaging apparatus according to claim 1, wherein the radiation source and the imaging unit are provided integrally.   The radiographic image capturing apparatus according to claim 1, further comprising an identification unit that identifies the radiation detector based on the identification information. The radiographic image capturing apparatus according to claim 1, wherein the marker is attached to a portion other than a detection region that detects the radiation on the detection surface side. Face rectangular including a detection area for detecting a pre-Symbol radiation in the radiation detector, giving each of the plurality of markers, at least one of near the vicinity of and different corners of the different sides of the plane containing the detection area The radiographic imaging device according to any one of claims 1 to 4, wherein The radiographic image capturing apparatus according to claim 1, wherein the marker is a bar code. The radiographic imaging apparatus according to any one of claims 1 to 6 , wherein the marker represents different color information as the identification information for each type of the radiation detector. Made from the marker light emitting device, the light emitting device emits light color, any one of claims 1 to 5 with at least one light of the lighting pattern and the light flashing pattern is representative of the said identification information 1 The radiographic imaging device described in the item. The radiographic apparatus according to claim 8 , wherein the light emitting device further represents detector information of the radiation detector by at least one of a color of emitted light, a lighting pattern of the light, and a blinking pattern of the light. . A positional relationship acquisition unit that acquires a relative positional relationship between the radiation detector and the imaging unit based on at least one of a size and a shape of the marker in the captured image when the marker is detected; The radiographic imaging device of any one of Claim 1 to 9 provided. The opposite side of the detection surface of the radiation of the radiation detector, any one of claims 1 to 10 other marker indicating that it is and the detection surface is a surface opposite Naru been granted The radiographic imaging device described in the item. A radiation source for irradiating the subject with radiation;
Imaging means for imaging the subject and obtaining a captured image of the subject ;
A radiation detector that detects the radiation transmitted through the subject and generates a radiation image of the subject, and a marker representing identification information for identifying the radiation detector is attached to a detection surface side of the radiation. A radiographic imaging device control method comprising a radiation detector comprising :
The marker of the Radiation detector detected from the captured image,
When the marker is detected, identification information of the radiation detector is acquired from the marker. A radiation source for irradiating the subject with radiation;
Imaging means for imaging the subject and obtaining a captured image of the subject ;
A radiation detector that detects the radiation transmitted through the subject and generates a radiation image of the subject, and a marker representing identification information for identifying the radiation detector is attached to a detection surface side of the radiation. A program for causing a computer to execute a control method of a radiographic imaging apparatus including a radiation detector comprising :
A step of detecting the marker of the radiological detector from the captured image,
A program for causing a computer to execute a procedure of acquiring identification information of the radiation detector from the marker when the marker is detected.