JP6683770B2 - Radiation image capturing apparatus, and control method and program for radiation image capturing apparatus - Google Patents

Description

  The present invention relates to a radiation image capturing apparatus that acquires a radiation image of a subject, a control method of the radiation image capturing apparatus, and a program.

  2. Description of the Related Art Conventionally, various radiation image capturing apparatuses using a movable radiation irradiating apparatus have been publicly known, as shown in Patent Documents 1 to 3, for example. Such a radiographic image capturing apparatus is basically held on the leg by accommodating a leg that can be driven by wheels, a battery for driving the radiation source, and an electric circuit related to driving the radiation source. It is configured to irradiate the subject with radiation by using a round-robin-type radiation irradiating device including a main body, an arm connected to the main body, and a radiation source attached to the arm. .

  Further, there is also proposed a radiation image capturing apparatus using a portable radiation irradiating device that is equipped with only a minimum of components for radiation irradiation, such as a radiation source and an electric circuit, and that an operator holds and operates by hand. ing. Such a portable radiation irradiator is light enough to be held and operated by an operator, and it is possible to perform sharper shooting with a smaller turn than the above-described round trip car radiation irradiator. ing.

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

  Further, in the radiation image capturing apparatus in which the radiation irradiating apparatus and the radiation detector are separate from each other as described above, the object is imaged by a camera to show the surface of the object for recognition of the irradiation field. A method of acquiring a captured image and displaying the captured image has been proposed (see Patent Documents 1 to 3). Further, in a radiation image capturing apparatus in which the radiation irradiating device and the radiation detector are separate bodies, a deviation easily occurs between the radiation irradiation field and the detection range of the radiation detector. Therefore, Patent Documents 1 to 3 also propose a method of superimposing and displaying a frame showing a radiation irradiation field and a frame showing a detection region of a radiation detector on a displayed captured image.

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

JP, 2009-131323, A JP 2007-029353A JP, 2010-119485, A Japanese Patent Publication No. 2013-524477

  Here, when the radiation detector is moved in order to properly position the radiation detector with respect to the radiation irradiation device, the radiation detector may be completely hidden behind the subject. When the radiation detector is hidden behind the subject in this manner, the captured image does not include the radiation detector. If the captured image does not include the radiation detector as described above, the position of the radiation detector cannot be detected by the method using the marker and the reflective element described in Patent Document 4. Further, in the method using the RF signal described in Patent Document 4, the RF signal itself can be detected from the radiation detector hidden behind the subject, but the position of the radiation detector on the captured image is specified from the RF signal. Is difficult.

  The present invention has been made in view of the above circumstances, and an object thereof is to accurately detect the position of a radiation detector in a captured image in a radiation image capturing apparatus, a control method of a radiation image capturing apparatus, and a program.

A radiographic image capturing apparatus according to the present invention includes a radiation source for irradiating a subject with radiation,
A photographing means for photographing the subject and obtaining a photographed image of the subject;
A radiation detector that detects the radiation that has passed through the subject and generates a radiation image of the subject. A marker is attached to the radiation detection surface side to detect the movement of the radiation detector and provide motion information. A radiation detector having a motion detecting means for outputting,
It is determined whether or not the captured image includes a marker. When it is determined that the captured image includes the marker, the position of the radiation detector in the captured image is detected based on the marker included in the captured image, and the image is captured. When it is determined that the image does not include the marker, the position of the radiation detector in the captured image is detected based on the motion information and the position of the radiation detector detected when the captured image includes the marker. And a position detecting means.

  The “photographed image of the subject” is an image representing the surface of the subject and the surface of an object around the subject within the photographing range of the photographing means. An infrared image representing the temperature distribution of the surface of the subject and the surface of the object around the subject, which is obtained by imaging the subject using infrared rays, is also included in the captured image of the subject.

  In addition, in the radiation image capturing apparatus according to the present invention, the position detecting unit, when it is determined that the captured image does not include the marker after it is determined that the captured image includes the marker, includes the marker included in the captured image. The position of the radiation detector in the captured image may be detected based on

  The radiographic image capturing apparatus according to the present invention may further include display means for displaying the captured image.

  Further, the radiation image capturing apparatus according to the present invention further includes display control means for displaying the captured image on the display means so that the region corresponding to the radiation detector can be identified based on the detection result of the position of the radiation detector. It may be one.

  The “region corresponding to the radiation detector” is preferably a region where the radiation detector can detect the radiation, but a region where the operator can grasp the region where the radiation can be detected, for example, the housing of the radiation detector. It may be a region surrounded by an outer frame.

  Further, in the radiographic image capturing apparatus according to the present invention, the display control unit may display the captured image on the display unit so that the region corresponding to the irradiation field of the radiation applied to the subject can be identified.

  “Identifiable” means to distinguish the region corresponding to the radiation detector or the irradiation field in the captured image so that the region corresponding to the radiation detector or the irradiation field can be seen. For example, by changing the area corresponding to the radiation detector or the irradiation field to a predetermined color, or by adding a frame to the area corresponding to the radiation detector or the irradiation field, the area corresponding to the radiation detector or the irradiation field is changed. It can be identifiable.

In the radiation image capturing apparatus according to the present invention, the captured image is an infrared image,
The display means may display an infrared image and a radiation image of the subject.
Further, in the radiographic image capturing apparatus according to the present invention, the marker may represent identification information for identifying the radiation detector.

  In this case, the marker may be a barcode.

  Further, the marker may represent different color information for each type of radiation detector as identification information.

  Further, 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 lighting pattern of light, and a blinking pattern of light.

  Further, the radiation image capturing apparatus according to the present invention may further include an identification information acquisition unit that acquires the identification information of the radiation detector from the marker included in the captured image.

  In this case, an identification means for identifying the radiation detector based on the identification information may be further provided.

A method of controlling a radiation image capturing apparatus according to the present invention includes a radiation source that irradiates a subject with radiation,
A photographing means for photographing the subject and obtaining a photographed image of the subject;
A radiation detector that detects the radiation that has passed through the subject and generates a radiation image of the subject. A marker is attached to the radiation detection surface side to detect the movement of the radiation detector and provide motion information. A method for controlling a radiation image capturing apparatus, comprising: a radiation detector having a motion detecting means for outputting;
Determine whether the captured image contains a marker,
When it is determined that the captured image includes the marker, the position of the radiation detector in the captured image is detected based on the marker included in the captured image,
When it is determined that the captured image does not include the marker, the position of the radiation detector in the captured image is detected based on the motion information and the position of the radiation detector detected when the captured image includes the marker. It is characterized by doing.

  The control method of the radiation image capturing apparatus according to the present invention may be provided as a program for causing a computer to execute the method.

  According to the present invention, it is determined whether or not the captured image includes the marker of the radiation detector, and when it is determined that the captured image includes the marker, the image in the captured image is determined based on the marker included in the captured image. The position of the radiation detector is detected. Then, when it is determined that the captured image does not include the marker, the captured image is determined based on the motion information detected by the motion detection unit and the position of the radiation detector detected when the captured image includes the marker. The position of the radiation detector at is detected. Therefore, even if the radiation detector is hidden in the back of the subject after the radiation detector is included in the captured image and the radiation detector is not included in the captured image, the position of the radiation detector in the captured image is reduced. Can be detected.

1 is a schematic diagram of a radiographic image capturing apparatus according to an embodiment of the present invention. Front perspective view of the radiation irradiation device Rear perspective view of radiation irradiation device Schematic block diagram showing the internal configuration of the radiation irradiation apparatus External perspective view of the radiation detector seen from the front side, which is the radiation irradiation side. It is a schematic block diagram which shows the internal structure of a radiation detector. An external perspective view of a radiation detector provided with LEDs as markers as seen from the front side, which is 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 which contains a part of radiation detector in addition to a subject. Flowchart showing processing performed in the present embodiment Flowchart showing processing performed in the present embodiment Diagram showing changes in the irradiation field depending on the body thickness of the subject The figure which shows the picked-up image on which various information was superimposed FIG. 3 is a diagram for explaining acquisition of radiation detector position information based on motion information. The figure which shows the picked-up image on which the information showing the direction in which a radiation detector exists is superimposed. The figure which shows the state where the center position of the irradiation field region and the center position of the detection region are made to match. The figure which shows the state where the irradiation field area and the detection area are matched. Figure showing icons of thin people, normal body types, fat people, etc. Perspective view showing the overall shape of a roundabout type radiation irradiation device Side view showing a state when using a roundabout type radiation irradiation device

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram of a radiographic image capturing apparatus according to an embodiment of the present invention. As shown in FIG. 1, the radiation image capturing apparatus 1 according to the present embodiment includes a portable radiation irradiation device 10, a radiation detector 30, and a console 50. Then, in order to acquire a radiation image of the subject H lying on the bed 2, the radiation detector 30 is inserted between the subject H and the bed 2, and the portable radiation irradiating apparatus 10 is moved to the subject H. Radiation is radiated toward the radiation detector 30 and a radiation image of the subject H is acquired by the radiation detector 30. The console 50 is also 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 irradiating apparatus 10 is provided with a radiation window 12 through 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 casing 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. The monitor 15 displays a captured image obtained by the camera 13 capturing 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. The distance sensor 27 measures the distance between the device 10 and the object using laser or ultrasonic waves. The camera 13 and the monitor 15 correspond to a photographing means and a display means, respectively.

  Grips 16 and 17 are attached to both side surfaces of the housing 11, respectively. The grip portion 16 includes two projecting portions 16A that project laterally from the upper and lower portions of the side surface of the housing 11, and a connecting portion 16B that connects the two projecting portions 16A. The grip portion 17 includes two projecting portions 17A that project laterally from the upper and lower portions 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 being curved, 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 grips 16 and 17, the operator can move the radiation irradiation apparatus 10 to a position where the subject H can be imaged. An imaging button 18 for emitting radiation to image the subject H is provided on the protrusion 17A on the upper side of the grip 17 that the operator holds with his / her right hand when taking an image. .

  The housing 11 includes a monitor 15, a radiation source 19, an irradiation controller 20, a collimator controller 21, an imaging controller 22, a drive controller 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 housed. 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) operating on a computer, dedicated hardware, or a combination of both. . The program is recorded and distributed in 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 device 10 from the recording medium. Alternatively, it is stored in a storage device of a server computer connected to a network or a network storage so as to be accessible from the outside, and is downloaded and installed in the radiation irradiation device 10 in response to a request.

  The radiation source 19 is composed of, for example, an X-ray tube, a booster circuit, and cooling means for cooling the X-ray tube.

  The irradiation control unit 20 drives the radiation source 19 and irradiates the subject H with the radiation so that the subject H is irradiated with the radiation having the intensity according to the preset imaging condition. Control the amount. The imaging conditions are a tube voltage (kV value) and a mAs value (tube current × irradiation time) according 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. The operator may measure the body thickness and input information for setting the imaging condition, including the measured body thickness, from the input unit 24 to the apparatus 10. In the present embodiment, the information for setting the imaging conditions such as the 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. It The irradiation control unit 20 controls irradiation of radiation on the subject H using the imaging conditions transmitted from the console 50.

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

  The image capturing control unit 22 drives the camera 13 to capture an image of the surface of the subject H and obtain a captured image G1. Further, the image capturing control unit 22 may perform image processing for improving the image quality on the captured 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 controller 23 controls the entire drive of the radiation irradiation device 10. That is, the drive controller 23 instructs the irradiation controller 20 to drive the radiation source 19, the collimator controller 21 to drive the collimator 14, and the imaging controller 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 of monitoring the state, a process of receiving an instruction from the input unit 24, a process of measuring a distance between the radiation irradiation device 10 and an object by the distance sensor 27, and a process of detecting a movement of the radiation irradiation device 10 by the motion sensor 28. And so on. It should be noted that each processing described above is performed by an instruction from the input unit 24 or an instruction transmitted from the console 50 and received by the communication unit 25. The drive control unit 23 corresponds to the display control means.

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

  The communication unit 25 wirelessly communicates with the console 50 to exchange information. Instead of wireless communication, the radiation irradiating 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, the angular velocity, and the inclination detected by the motion sensor 28 are output to the drive control unit 23 as motion information, used for controlling the radiation irradiation device 10 during imaging, and transmitted from the communication unit 25 to the console 50. In addition, the tilt is a tilt with respect to a position where the radiation irradiation device 10 is held horizontally with the radiation irradiation axis, which is an axis that coincides with the irradiation direction of the radiation, aligned with the direction in which gravity acts. The motion sensor 28 corresponds to the motion detecting means.

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

  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 which is 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 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 image pickup area in which a plurality of pixels for accumulating charges according to visible light from the scintillator are arranged is formed. In the housing 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. An imaging control unit 35 and the like having a signal processing circuit and the like for outputting the output are built-in.

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

  A transmission plate 33 that transmits radiation is attached to the front surface 32A of the housing 32. The transmission plate 33 has a size that substantially matches the radiation detection region of the radiation detector 30, and is made of a carbon material that is lightweight, has high rigidity, and has high radiation transparency.

  Markers 34A to 34D representing identification information for identifying the radiation detector 30 are provided at four corners of the front surface 32A of the housing 32. In the present embodiment, each of the markers 34A to 34D is composed of two bar codes that are orthogonal to each other. The two barcodes are provided on the front surface 30A of the radiation detector 30 so as to define the four corners of the detection area of the radiation detector 30. If the radiation detector 30 can be identified, a tape or the like having a unique color attached to the radiation detector 30 may be used as a marker. In this case, the radiation detector 30 can be identified by the color of the marker.

  Here, the markers 34A to 34D are configured by a pair of two barcodes, but in the present embodiment, one of the two barcodes is housed in the radiation detector 30. The information indicating the vertical direction of the image detecting unit 31 is included. In the present embodiment, the side provided with the markers 34A and 34B is the top, that is, the top side. Therefore, in the present embodiment, in the radiation detector 30, when the side on which the markers 34A and 34B are attached and the side on which the markers 34C and 34D are attached are defined, these two sides are orthogonal to each other. The direction from the side on which the markers 34C and 34D are attached to the side on which the markers 34A and 34B are attached is the vertical direction along the straight line. The upside down direction means the direction on the radiation detector 30, and does not mean the direction in which gravity acts.

  A light emitting element such as an LED that emits a color unique to the radiation detector 30 may be used 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 40A to 40D each composed of a plurality of light emitting elements at four corners of the detection area of the radiation detector 30, the radiation detector can be a lighting pattern, a blinking pattern, or a color arrangement of the light emitting elements. 30 can be identified.

  The marker is not limited to the barcode or the light emitting element, and may be any marker as long as 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 houses an image detection unit 31, a shooting 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 as in the radiation irradiation device 10.

  The imaging control unit 35 includes the gate driver, the signal processing circuit, and the like as described above, controls the driving of these, generates an analog image signal representing the radiation image G2, and outputs the analog image signal to the drive control unit 36.

  The drive controller 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 radiographic image G2, and the communication unit 37 to direct the image signal representing the radiographic image G2 and various information to the console 50. With the motion sensor 38, a process of detecting the movement of the radiation detector 30 by the motion sensor 38, a process of monitoring the state of the battery 39, and the like.

  The communication unit 37 wirelessly communicates with the console 50 to exchange information. Note that, instead of wireless communication, the radiation detector 30 and the console 50 may be connected by a cable to exchange information 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, the angular velocity and the 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. Note that the inclination is 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 radiographic image 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) operating on a computer, dedicated hardware, or a combination of both. The program is installed in the console 50 as in the case of the radiation irradiating device 10.

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

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

  The output unit 54 outputs the radiation 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 a radiation image, a storage device that stores radiation image data, or the like.

  The storage unit 55 stores the size of the detection area of the radiation detector 30, the image processing parameters for image processing performed by the image processing unit 52, the type of the radiation detector 30 for setting imaging conditions, and the body thickness of the subject H. Parameters corresponding to the above, various information necessary for processing in the console 50, etc. are stored, and the radiation image G2 output from the image processing unit 52, the captured image G1 transmitted from the radiation irradiation device 10, and the like 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 and the like for performing various inputs to the console 50. The input unit 56 may be a touch panel.

  The communication unit 57 wirelessly communicates with the radiation irradiation device 10 and the radiation detector 30 to exchange information. Instead of wireless communication, the cable may be used to connect the console 50 to the radiation irradiating device 10 and the radiation detector 30 to exchange information 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, the image processing unit 52 to perform image processing on the radiation image G2, the detected markers 34A to. 34D, the process of acquiring the identification information of the radiation detector 30, 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. The process of outputting the radiation image G2, the process of instructing the communication unit 57 to exchange various information with the radiation irradiation device 10 and the radiation detector 30, the process of accepting the instruction from the input unit 56, and the monitor 58 of various information. Perform processing such as displaying. The control unit 59 corresponds to the position detection means, the identification information acquisition means, and the identification means.

  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 directs the radiation irradiation device 10 toward the subject H, and the camera 13 takes an image of the subject H. In the present embodiment, the chest of the subject H is imaged. Therefore, before photographing, the photographed 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 four corners. The control unit 59 determines whether or not the photographed image G1 includes any of the markers 34A to 34D, and when it is determined that the photographed image G1 includes any of the markers 34A to 34D, the photographed image G1. Is determined to include the radiation detector 30.

  On the other hand, the control unit 59 transmits the radiation detector position information indicating the position of the radiation detector 30 in the captured image G1 from the communication unit 57 to the radiation irradiation device 10. The radiation detector position information is a coordinate position that represents the position of the corner of the detection area 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 area of the radiation detector 30. Therefore, the control unit 59 also transmits the center position information indicating the center position of the radiation detector 30 to the radiation irradiation apparatus 10. Further, the top-bottom direction of the radiation detector 30 is recognized from any of the markers 34A to 34D, and the top-bottom direction information is also transmitted to the radiation irradiation device 10.

  Further, the control unit 59 acquires the identification information of the radiation detector 30 from any of the markers 34A to 34D. Further, the control unit 59 uses the identification information to determine whether the radiation detector 30 is the radiation detector to be used. Here, the type of radiation detector to be used is registered in the console 50 in advance. Specifically, the identification information of the radiation detector to be used is stored in the storage unit 55 as registration identification information. The control unit 59 compares the identification information of the radiation detector 30 with the registration identification information stored in the storage unit 55, and determines whether the acquired identification information is the registration identification information. If this determination is positive, the control unit 59 transmits the identification information to the radiation irradiation device 10. In the radiation irradiation device 10, identification information is displayed on the monitor 15 as described later. On the other hand, when the determination is negative, the control unit 59 sends information to the effect that the radiation detector 30 is not the radiation detector to be used, to the radiation irradiation apparatus 10. The radiation irradiation device 10 warns that the radiation detector 30 is not the radiation detector to be used. Specifically, text or the like indicating that the radiation detector 30 is not the radiation detector to be used is displayed on the monitor 15. This allows the operator to 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. As a result, the work of replacing the radiation detector 30 can be omitted.

  Next, the processing performed in this embodiment will be described. 11 and 12 are flowcharts showing the processing performed in this embodiment. In the radiation image capturing apparatus according to the present embodiment, two operators respectively handle the radiation irradiation device 10 and the radiation detector 30 to position the radiation detector 30 behind the subject H, and the irradiation field. It is assumed that the pre-imaging work for setting and the like is performed, and the photography is performed after the pre-imaging work is completed. First, the radiation irradiation device 10 is held above the subject H, and the subject H is photographed by the camera 13 to obtain a photographed image G1 of the subject H (step ST1). The radiation irradiation device 10 transmits the captured image G1, the SID, the SOD, and the information on the irradiation field defined by the collimator 14 to the console 50 (transmitted captured image and the like: step ST2). In addition, the radiation detector 30 transmits information indicating the driving status of the radiation detector 30, information indicating the remaining battery level of the radiation detector 30, and motion information detected by the motion sensor 38 to the console 50. (Transmitting detector information: step ST3).

  The control unit 59 of the console 50 determines whether or not the captured image G1 includes the radiation detector 30 by determining whether or not the captured image G1 includes any of the markers 34A to 34D (step S60). ST4). As shown in FIG. 9, when the captured image G1 does not include the radiation detector 30, step ST4 is denied and the process returns to step ST1. As shown in FIG. 10, when one of the markers 34A to 34D is included in the captured image G1 and, as a result, the radiation detector 30 is included in the captured image G1, step ST4 is affirmative and the control unit 59 Based on any of the markers 34A to 34D of the radiation detector 30 included in the captured image G1, identification information of the radiation detector 30, radiation detector position information indicating the position of the radiation detector 30 on the captured image G1, radiation Information relating to the detector, including information indicating the vertical direction of the detector 30 and information on the center position of the radiation detector 30, is acquired. Further, the control unit 59 calculates the body thickness of the subject H by subtracting SOD from SID, and sets the imaging condition from the body thickness.

  The imaging conditions may be set according to the part of the subject H included in the captured image G1. The information on the site of the subject H may be acquired by receiving an input from the operator in the radiation irradiation apparatus 10 or may be acquired by receiving an input from the input unit 56 of the console 50. The scintillator used in the image detection unit 31 housed in the radiation detector 30 has a radiation quality suitable for the type (whether the pressure is high or low). Therefore, the imaging condition may be set according to the material of the scintillator used in the image detection unit 31 housed in the radiation detector 30 in addition to the body thickness. In this case, a table in which the information of the scintillator used in the image detection unit 31 and the imaging conditions are associated with each other according to the identification information of the radiation detector 30 may be stored in the storage unit 55. Thereby, the imaging condition can be set according to the identification information of the radiation detector 30 acquired from the captured image G1 by referring to the table. Further, when the same radiation irradiation device 10 and radiation detector 30 are used to store the imaging information when the same subject H is imaged, the imaging conditions may be set in consideration thereof. .

  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. Therefore, the control unit 59 calculates the body thickness of the subject H from the SID and SOD, and further, based on the information of the range defined by the collimator 14 transmitted from the radiation irradiation apparatus 10, the central position of the irradiation field region. And information related to the irradiation field including size information. Then, the control unit 59 transmits the detector information, the detector-related information, the irradiation field-related information, and the imaging condition to the radiation irradiation apparatus 10 (information transmission: step ST5). The identification information is transmitted when the acquired identification information is the identification information of the radiation detector to be used, as described above.

  Based on the information transmitted from the console 50, the drive control unit 23 of the radiation irradiating device 10 identifies the identification information of the radiation detector 30, the driving status of the radiation detector 30, in 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 region corresponding to the radiation detector 30, the central position of the radiation detector 30, and the radiation field of the radiation regulated by the collimator 14 are displayed in an overlapping manner ( Information display: step ST6).

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

  Further, 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. As a result, it is possible to prevent the detection area 63 and the irradiation field area 65 that are superimposed on the captured image G1 from being mixed in with the clothes of the subject H.

  Then, the subject H is continuously photographed by the camera 13 of the radiation irradiating device 10 to obtain a photographed image G1 of the subject H, and the radiation irradiating device 10 transmits the photographed image G1 to the console 50 (transmitting photographed image: step ST7). It should be noted that the radiation detector 30 continues to transmit 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 captured image G1 includes the radiation detector 30 by determining whether or not the captured image G1 includes any of the markers 34A to 34D ( Step ST8). When step ST8 is affirmed, the control unit 59 continuously determines the position of the radiation detector 30 in the captured image G1 based on any of the markers 34A to 34D attached to the radiation detector 30 included in the captured image G1. The radiation detector position information represented is transmitted (step ST9). The drive control unit 23 of the radiation irradiation device 10 superimposes and displays the detection area detection area 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 ST10. ).

  On the other hand, when the radiation detector 30 is moved after the radiation detector 30 is included in the captured image G1, the radiation detector 30 moves to a position outside the angle of view of the camera 13, and the radiation is detected in the captured image G1. The container 30 may not be included. Further, when 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, since the markers 34A to 34D are not included in the captured image G1, the position of the radiation detector 30 cannot be specified only from the captured image G1. In this case, step ST8 is denied. When step ST8 is denied, the control unit 59 of the console 50 acquires the radiation detector position information based on the motion information of the radiation detector 30 detected by the motion sensor 38 transmitted from the radiation detector 30. (Step ST11).

  FIG. 15 is a diagram for explaining acquisition of radiation detector position information based on motion information. In FIG. 15, any position of the markers 34A to 34D in the radiation detector 30 when the captured image G1 includes any of the markers 34A to 34D of the radiation detector 30 is set to the reference position P1. Then, the movement amount M1 of the radiation detector 30 from the reference position P1 is calculated using the motion information and the size of the detection area of the radiation detector 30. Then, the radiation detector position information is acquired based on the calculated movement amount M1. 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 area 63 and the central position 64 of the radiation detector 30 can be displayed in a superimposed manner on the captured image G1.

  In addition, when it is determined that the captured image G1 does not include any of the markers 34A to 34D after it is determined that the captured image G1 includes any of the markers 34A to 34D, that is, the captured image G1 includes radiation. When the captured image G1 does not include the radiation detector 30 after including the detector 30, the radiation detector 30 uses the radiation detector position information obtained based on the motion information of the radiation detector 30. The information indicating the direction in which is present may be displayed on the captured image G1. FIG. 16 is a diagram showing a captured image in which, in addition to various information, information indicating the direction in which the radiation detector 30 is present is superimposed. In FIG. 16, the position where the radiation detector 30 is present is shown by a virtual line. As shown in FIG. 16, in the captured image G1 displayed on the monitor 15, in addition to the information superimposed on the captured image G1 shown in FIG. 14, an arrow 67 is provided as information indicating the direction in which the radiation detector 30 is present. It is displayed. Instead of the arrow 67, characters such as up, down, left, and right may be used as information indicating the direction in which the radiation detector 30 is present.

  The operators of the radiation irradiation device 10 and the radiation detector 30 cooperate with each other to perform pre-imaging work. 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 device 10 sees the image displayed on the monitor 15 and adjusts it appropriately. It is confirmed whether or not the radiation detector 30 has moved to the position. If necessary, the position of the radiation irradiation device 10 is moved. By this work, 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 matches the center position 66 of the irradiation field region 65, and if they match, the radiation irradiation device 10 is provided with information indicating that they match. It may be transmitted to. When the radiation irradiation device 10 receives the information indicating that the central positions match, the radiation irradiation device 10 indicates to the monitor 15 that the central positions match, for example, the text "center positions match" or a mark indicating that the central positions match. indicate. In FIG. 17, a star-shaped mark 68 indicates that the center positions match. Instead of displaying on the monitor 15, an operator may be notified that the center position of the radiation detector 30 coincides with the center position 66 of the irradiation field region 65, for example, by voice output or blinking of 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 tilt information of the radiation detector 30 included in the movement information of the radiation detector 30. Information on the tilt of the radiation detector 30 with respect to may be superimposed and displayed on the captured image G1. Here, the tilt of the radiation detector 30 with respect to the radiation irradiating device 10 is a two-dimensional tilt with respect to a plane perpendicular to the radiation irradiation optical axis. When the x-axis and the y-axis are set on the plane of the radiation detector 30, the tilt is the tilt angle around each of the x-axis and the y-axis. In the control unit 59 of the console 50, when the central 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 device 10. When the radiation irradiation device 10 receives the information on the inclination of the radiation detector 30, the radiation irradiation device 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. Thereby, the operator adjusts the inclination of the radiation detector 30 to set the angle around the x-axis and the y-axis of the radiation detector 30 to 0 so that the radiation irradiation axis and the radiation detector 30 intersect perpendicularly. be able to.

  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 do it. In this case, by fixing the radiation detector 30 and then adjusting the inclination of the radiation irradiation device 10, the relative inclination of the radiation detector 30 with respect to the radiation irradiation device 10 can be adjusted. When the radiation irradiation axis and the radiation detector 30 are vertical, 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 region 65 is larger than the detection region 63, of the radiation that has passed through the subject H, the radiation that is not irradiated on the radiation detector 30 can be imaged. It can't be done and is useless. Irradiating the subject H with such useless radiation increases the amount of exposure of the subject H.

  Therefore, the operator of the radiation irradiation apparatus 10 uses the input unit 24 to give an instruction to match the irradiation field region 65 and the detection region 63. Therefore, the drive control unit 23 of the radiation irradiating device 10 determines whether or not there is a region matching instruction (step ST12). 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 so that the irradiation field area 65 and the detection area 63 coincide with each other as shown in FIG.

  If step ST12 is denied, the process returns to step ST7. As a result, the captured image G1 is continuously transmitted to the console 50, and the radiation detector position information is acquired in the console 50. When the movement of the radiation detector 30 is continued, any one of the markers 34A to 34D is included in the captured image G1, that is, any one of the markers 34A to 34D is included in the captured image G1 after it is determined that the radiation detector 30 is not included. In other words, it may be determined that the radiation detector 30 is included. In this case, step ST8 is affirmed, and the 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, but if 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. Therefore, in the present embodiment, in the case where the input unit 24 accepts the input that the preparation for imaging is completed after the instruction to match the irradiation field region 65 and the detection region 63 using the input unit 24 is completed. Alternatively, the collimator controller 21 may drive the collimator 14.

  Further, when the step ST12 is positive, the drive control section 23 of the radiation irradiating device 10 determines whether or not the imaging preparation is completed (step ST13). Completion of shooting preparation may be accepted by input from the input unit 24 as described above. When step ST13 is denied, it returns to step ST7.

  If step ST13 is positive, the drive control unit 23 turns on the irradiation field lamp 29, and the collimator control unit 21 drives the collimator 14 to set the irradiation field (step ST14). At this time, it is preferable to notify the operator that the collimator 14 is being driven by, for example, blinking the irradiation field area 65 displayed on the monitor 15. The drive control unit 23 of the radiation irradiation apparatus 10 does not accept the operation of the photographing button 18 while the collimator 14 is being driven. Then, when the driving of the collimator 14 is completed, the drive control unit 23 detects the movement of the radiation irradiation device 10 by the motion sensor 28 and calculates the movement amount of the radiation irradiation device 10 per unit time (step ST15). The amount of movement of the radiation irradiation device 10 per unit time corresponds to camera shake of the operator. The drive control unit 23 determines whether or not the amount of movement per unit time is less than the threshold value Th1 (step ST16). When step ST16 is denied, the drive controller 23 displays a warning on the monitor 15 (step ST17) and returns to step ST15. The operator can take measures such as holding the radiation irradiation device 10 firmly by the warning display.

  In addition, when step ST16 is denied, the drive control unit 23 controls the radiation source 19 so as not to emit the radiation even when the imaging button 18 is operated. Alternatively, the shooting button 18 may be locked so that the shooting button 18 cannot be operated. Further, the threshold value Th1 may be changed according to the radiation irradiation time included in the imaging conditions. For example, when the radiation irradiation time is long, the effect of camera shake becomes large, so the threshold value Th1 may be changed so as to become shorter as the radiation irradiation time becomes longer.

  When step ST16 is affirmed, the drive control unit 23 determines whether or not a photographing instruction is given from the input unit 24 (step ST18). When step ST18 is denied, it returns to step ST15. When step ST18 is positive, the drive controller 23 drives the radiation source 19 and emits the radiation toward the subject H, thereby irradiating the subject H with the radiation (step ST19). In addition, when step ST16 is affirmed, the drive control unit 23 may display on the monitor 15 that photographing is possible. If step ST16 is negative and affirmative, the drive controller 23 stops the warning display on the monitor 15 and enables the radiation source 19 by operating the imaging button 18. 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 ST20). The acquired radiation image G2 is transmitted to the console 50, subjected to image processing to improve image quality in the image processing unit 52, and output to the output unit 54. Further, the control unit 59 transmits the image-processed radiation image G2 to the radiation irradiation device 10 (step ST21).

  The drive control unit 23 of the radiation irradiation device 10 displays the radiation image G2 on the monitor 15 (step ST22) and ends the process. In this case, the captured image G1 and the radiation image G2 may be displayed on the monitor 15 in a superimposed manner, or only the radiation image G2 may be displayed. This makes it possible to determine whether or not the radiation image G2 has been properly acquired.

  As described above, in the present embodiment, it is determined whether the captured image G1 includes the markers 34A to 34D of the radiation detector 30, and when it is determined that the captured image G1 includes the markers 34A to 34D, The position of the radiation detector 30 in the captured image G1 is detected based on the markers 34A to 34D included in the captured image G1. Then, when it is determined that the captured image G1 does not include the markers 34A to 34D, the motion information detected by the motion sensor 38 and the radiation detector detected when the captured image G1 includes the markers 34A to 34D. Based on the position of 30, the position of the radiation detector 30 in the captured image G1 is detected. Therefore, even after the radiation detector 30 is once included in the captured image G1, even if the radiation detector 30 is hidden behind the subject and the radiation image 30 does not include the radiation detector 30, the captured image G1 is not included. The position of the radiation detector 30 can be detected.

  In the above embodiment, the distance sensor 27 detects the SID and SOD and calculates the body thickness of the subject H from the SID and SOD. However, in the radiation irradiation 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, but as shown in FIG. 19, an icon 90 of a thin person, a person with a normal body shape, a fat person, etc. is displayed on the monitor 15 and displayed. The input of the body thickness may be accepted by allowing the operator to select one of the icons 90.

  Further, since the radiation irradiation apparatus 10 according to the present embodiment is portable, it is possible to emit radiation toward the 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 the radiation cannot be emitted when the captured image G1 does not include an object such as the radiation detector 30 necessary for capturing. Preferably.

  Further, in the above-described embodiment, the SID and SOD are measured by the distance sensor 27 before the pre-imaging work is started, but the SID and SOD may be measured by the distance sensor 27 during the pre-imaging work. Further, in this case, the position for measuring the SID and SOD may be designated on the monitor 15, and the information on the position may be transmitted to the console 50. This allows the console 50 to recognize at which position in the subject H the body thickness is acquired.

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

  In addition, in the above-described embodiment, the captured image G1, the identification information of the radiation detector 30, the radiation detector position information, the information indicating the vertical direction and the center position information, and the information indicating the driving state of the radiation detector 30 are displayed from the console 50. Also, the battery remaining amount information and the like may be transmitted to the terminal 80, and various information may be superimposed and displayed on the captured image G1 in the terminal 80, similar to that displayed on the monitor 15. As a result, the doctor or the like can monitor the status of the pre-imaging work of the subject H on his / her terminal 80.

  Further, in the above-described embodiment, the vertical direction of the radiation detector 30 may be the horizontal direction of the captured image G1. Further, 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, the acquired radiation image G2 does not match the top and bottom of the captured image G1. Therefore, if the acquired radiation image G2 is displayed as it is, the radiation image G2 becomes difficult to see. In this embodiment, since the console 50 detects the vertical direction of the radiation detector 30, the radiation image G2 can be rotated so that the displayed radiation image G2 is correctly oriented. 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 made to coincide with each other, so that the displayed radiation image G2 can be easily viewed. it can.

  Further, in the above-described embodiment, the movement of the radiation irradiation apparatus 10 per unit time may be equal to or more than the threshold Th1 during the irradiation of the radiation. In such a case, the emission of the radiation is temporarily stopped, and when the movement of the radiation irradiation apparatus 10 per unit time is less than the threshold value Th1, the radiation is further emitted for the remaining irradiation time. Good. In this case, two radiation images are acquired before and after the emission of radiation is stopped, but the final radiation image G2 may be generated by adding the two radiation images in the console 50 and combining them.

  Further, in the above embodiment, the irradiation field lamp 29 is turned on when the preparation for photographing is completed, but it may be switched whether the irradiation field lamp 29 is turned on or 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 rampage. Therefore, the control unit 59 of the console 50 determines the site of the subject H included in the captured image G1, and when the site is the face of an animal, the irradiation field lamp 29 is also activated by an instruction to complete the preparation for imaging. You may not turn it on. As a result, it is possible to prevent the animal from being surprised and violent due to the visible light emitted from the irradiation field lamp 29. Since the operator knows the region of the subject H, the irradiation field lamp 29 may be turned on or off according to an instruction from the input unit 24 by the operator.

  Further, in the above embodiment, the amount of movement detected by the motion sensor 28 is used to calculate the amount of movement of the radiation irradiation apparatus 10 per unit time. Here, in the present embodiment, the captured image G1 is acquired at a predetermined frame rate. Therefore, the amount of movement of the radiation irradiating apparatus 10 per unit time may be calculated from the two captured images acquired at different capturing timings and the capturing time difference between the two captured images.

  Further, in the above embodiment, the detection area 63 corresponding to the detection area of the radiation detector 30 is superimposed on the captured image G1, so that the captured image G1 is displayed so that the area corresponding to the radiation detector can be identified. 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.

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

  It is preferable that the camera 13 be a camera that can switch between visible light imaging and infrared imaging. When the camera 13 capable of switching between the visible light capturing and the infrared capturing is used, first, the subject H is captured by the infrared ray to acquire the captured image G1 representing the temperature distribution, and the captured image representing the temperature distribution is acquired. The irradiation field is first positioned using G1. After that, the camera 13 is switched to the imaging with visible light, the detector area and the irradiation field area of the radiation detector 30 are superimposed and displayed on the captured image G1 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 and the irradiation field area coincide with each other. As a result, even when 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.

  By displaying the captured image G1 that is an infrared image on the monitor 15 in this manner, it is possible to recognize an abnormality in the body temperature of the subject H. Further, the radiation image G1 acquired by photographing and the photographed image G1 which is an infrared image may be displayed side by side on the monitor 15. This makes it possible to compare the infrared image and the radiation image G2.

  Further, although the portable radiation irradiation apparatus 10 is used in the above-described embodiment, a round trip car type radiation irradiation apparatus that is capable of traveling may be used. FIG. 20 is a perspective view showing the overall shape of a round-trip radiation irradiation device, and FIG. 21 is a diagram showing a state when the round-trip radiation irradiation device is used. The round-robin-type radiation irradiating apparatus 100 includes a leg portion 110 capable of traveling on a device mounting surface, a main body portion 120 held on the leg portion 110, and an arm portion 130 connected to the main body portion 120. The radiation source section 140 is attached to the tip of the arm section 130.

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

  The main body unit 120 has an irradiation control unit 20, a collimator control unit 21, an imaging control unit 22, a drive control unit 23, which is the same as the radiation irradiation device 10 in the above-described embodiment, in a housing 122 fixed on a base 121. The communication unit 25 and the battery 26 are housed. A handle 123 for pushing or 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 portion of the base 121.

  The operation unit 125 includes an input unit 126 such as operation buttons and switches for inputting signals for instructing various operations of the radiation irradiation apparatus 100, a monitor 127 for displaying various information, and the like. The input unit 126 may be composed of a touch panel, like the radiation irradiation apparatus 10 according to the above-described embodiment.

  The arm portion 130 is composed of a plurality of members 131, 132, 133 having a nested structure. The member 132 and the member 133 are connected by the rotation holding mechanism 134, and the member 133 is adapted to rotate in a direction in which the angle changes with respect to the member 132.

  The radiation source section 140 is swingably attached to the tip of the member 133 of the arm section 130. The radiation source unit 140 houses the camera 13, the collimator 14, the radiation source 19, the distance sensor 27, the motion sensor 28, and the irradiation field lamp 29, which are similar to those of the radiation irradiation apparatus 10 in the above-described embodiment. The swingable radiation source section 140 can be fixed at the swinging position by operating the lock lever 141.

  In such a round-trip vehicle type radiation irradiation apparatus 100, the 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 are set so that the radiation source unit 140 is located above the subject H above the subject H. Set the swing position of. By imaging the subject H with the camera 13 in this state, the radiation detector 30 in the captured image G1 is captured based on the markers 34A to 34D of the radiation detector 30 included in the captured image G1 as in the above embodiment. The position can be specified.

  Further, when the round-robin-type radiation irradiating device 100 is used, the arm portion 130 is expanded / contracted, the radiation source portion 140 is swung, and the collimator is arranged so that the detection area and the irradiation field area that are superimposed on the radiation image G1 coincide with each other. The drive of 14 may be controlled.

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

  The position of the radiation detector in the captured image is more accurate when detected based on the marker than when detected based on the motion information. Therefore, if it is determined that the captured image does not include the marker and then the captured image includes the marker, the position of the radiation detector in the captured image is detected based on the marker included in the captured image. By doing so, the position of the radiation detector in the captured image can be detected more accurately.

  By displaying the photographed image, the state of the subject to be photographed can be confirmed.

  By displaying the captured image so that the region corresponding to the radiation detector can be identified, the region corresponding to the radiation detector in the captured image can be easily recognized.

  By displaying the captured image so that the region corresponding to the irradiation field can be identified, the region corresponding to the irradiation field in the captured image can be easily recognized.

DESCRIPTION OF SYMBOLS 1 Radiation image photographing device 10 Radiation irradiation device 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 34A to 34D marker 35 imaging control unit 36 drive control unit 37 communication unit 38 motion sensor 39 battery 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 (17)

A radiation source for irradiating the subject with radiation,
A photographing means for photographing the subject to obtain a photographed image of the subject;
A radiation detector having a rectangular detection area for detecting the radiation that has passed through the object to generate a radiation image of the object, and comprising two barcodes orthogonal to each other at four corners of the detection area. And a radiation detector provided with a motion detection means for detecting the motion of the radiation detector and outputting motion information,
When the captured image does not include the marker, the captured image is based on information about the position of the marker detected when the captured image includes the marker and the size of the detection area of the radiation detector. The position of the radiation detector detected when the marker was included in the, the position of the radiation detector detected when the marker was included in the captured image and based on the movement information Position detecting means for detecting the position of the radiation detector,
A radiographic image capturing apparatus comprising: a notification unit that notifies the position of the radiation detector detected by the position detection unit.   The radiation image capturing apparatus according to claim 1, wherein one of the two orthogonal barcodes includes information indicating a vertical direction of the radiation detector.   The captured image and the radiation image are displayed on a display unit, the vertical direction of the radiation detector is detected based on the marker included in the captured image, and the vertical direction of the radiation detector is the vertical direction of the captured image. The radiographic image capturing apparatus according to claim 2, further comprising a control unit that rotates the radiographic image so that the radiographic image coincides with the vertical direction of the captured image when the radiographic image does not match   4. The position detecting unit detects the position of the radiation detector in the captured image based on the marker included in the captured image when the captured image includes the marker. The radiation image capturing apparatus according to item 1.   The radiographic image capturing apparatus according to claim 1, wherein the notification unit is a display unit that displays the captured image.   The radiation image according to claim 5, further comprising display control means for displaying the captured image on the display means so that an area corresponding to the radiation detector can be identified based on a detection result of the position of the radiation detector. Imaging device.   7. The radiographic image capturing apparatus according to claim 6, wherein the display control unit displays the captured image on the display unit so that an area corresponding to an irradiation field of the radiation with which the subject is irradiated can be identified. The photographed image is an infrared image,
The radiation image capturing apparatus according to claim 5 , wherein the display unit displays the infrared image and the radiation image of the subject.   The radiation image capturing apparatus according to claim 1, wherein the position detecting unit detects a center position of the radiation detector as a position of the radiation detector.   The notification means, when the center position of the radiation detector and the center position of the region corresponding to the irradiation field of the radiation match, the center position of the radiation detector and the region corresponding to the irradiation field of the radiation The radiographic image capturing apparatus according to claim 1, which notifies that the center position matches.   The radiation image capturing apparatus according to claim 1, wherein the marker represents identification information that identifies the radiation detector.   The radiographic image capturing apparatus according to claim 11, wherein the marker represents color information that is different for each type of the radiation detector, as the identification information.   13. The radiographic image capturing apparatus according to claim 12, wherein the marker includes a light emitting device, and the light emitting device represents the identification information by at least one of a color of light emitted, a lighting pattern of the light, and a blinking pattern of the light. .   The radiographic image capturing apparatus according to claim 11, further comprising an identification information acquiring unit that acquires identification information of the radiation detector from the marker included in the captured image.   The radiographic image capturing apparatus according to claim 14, further comprising an identification unit that identifies the radiation detector based on the identification information. A radiation source for irradiating the subject with radiation,
A photographing means for photographing the subject to obtain a photographed image of the subject;
A radiation detector having a rectangular detection area for detecting the radiation that has passed through the object to generate a radiation image of the object, and comprising two barcodes orthogonal to each other at four corners of the detection area. And a radiation detector provided with a motion detector for detecting the motion of the radiation detector and outputting motion information. And
When the captured image does not include the marker, the captured image is based on information about the position of the marker detected when the captured image includes the marker and the size of the detection area of the radiation detector. The position of the radiation detector detected when the marker was included in the, the position of the radiation detector detected when the marker was included in the captured image and based on the movement information Detects the position of the radiation detector,
A method for controlling a radiographic image capturing apparatus, characterized by notifying the detected position of the radiation detector. A radiation source for irradiating the subject with radiation,
A photographing means for photographing the subject to obtain a photographed image of the subject;
A radiation detector having a rectangular detection area for detecting the radiation that has passed through the object to generate a radiation image of the object, and comprising two barcodes orthogonal to each other at four corners of the detection area. And a radiation detector provided with a motion detector for detecting the motion of the radiation detector and outputting motion information. A program for causing a computer to execute
When the captured image does not include the marker, the captured image is based on information about the position of the marker detected when the captured image includes the marker and the size of the detection area of the radiation detector. The position of the radiation detector detected when the marker was included in the, the position of the radiation detector detected when the marker was included in the captured image and based on the movement information A procedure for detecting the position of the radiation detector,
A program for causing a computer to execute the procedure of notifying the detected position of the radiation detector.