JP2008220762A - Radiographic apparatus, radiographic method, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radiographic apparatus capable of correctly recording the positional relation between a radiation generator and a subject when the subject is radiographed. <P>SOLUTION: The radiographic apparatus includes a radiation image capturing part for capturing a radiation image; a first radio signal detector for detecting a radio signal from a radio signal transmitter mounted in a prescribed region of the subject at a first position when the region of the subject to be radiographed is fixed to the radiation image capturing part; a second signal detector for detecting the radio signal from the radio signal transmitter at a second position different from the first position when the region of the subject to be radiographed is fixed to the radiation image capturing part; a radio signal comparison part for comparing the radio signals detected by the first radio signal detector and the second radio signal detector; a positional relation specifying part for specifying the positional relation between the radiation image capturing part and the region where the radio signal transmitter is attached based on the result of comparison by the radio signal comparison part; and an output part for outputting the positional relation specified by the positional relation specifying part as correlated to the radiation image. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a radiation imaging apparatus, a radiation imaging method, and a program. In particular, the present invention relates to a radiation imaging apparatus and a radiation imaging method for capturing a radiation image, and a program for the radiation imaging apparatus.

An electromagnetic irradiator, an electromagnetic receiver, and an imaging unit that determines an isocenter for image scanning based on information from the electromagnetic receiver, the imaging unit identifying an isocenter based on a plurality of electromagnetic position measurements A system is known (for example, refer to Patent Document 1). Also, there is known a medical imaging system in which a plurality of light reflecting markers are arranged on a patient's body, and positioning is performed by detecting light reflected from the markers with an image sensor (see, for example, Patent Document 2). ). In addition, a front camera that monitors the front of the patient's head is provided in the vicinity of the chin rest that moves up and down, and the face image data acquired by the camera is analyzed by a computer, and each part of the positioning and adjusting device is analyzed based on the analysis value. There is known a panoramic X-ray imaging positioning automatic adjustment device that automatically adjusts to the correct position of a part (see, for example, Patent Document 3).
JP 2005-161055 A JP-T-2001-504013 JP 2001-346996 A

  According to the technique disclosed in Patent Documents 1-3, it is possible to position an apparatus in X-ray imaging. However, even if the radiographer records the wrong imaging direction in the X-ray image even if the positioning is properly performed, there is a possibility that an erroneous diagnosis is made. In order to make an error-free diagnosis, it is desirable to be able to accurately record from which direction the X-ray image was taken.

  Then, an object of this invention is to provide the radiation imaging device, the radiation imaging method, and program which can solve the said subject. This object is achieved by a combination of features described in the independent claims. The dependent claims define further advantageous specific examples of the present invention.

  In order to solve the above problems, a radiation imaging apparatus according to the first embodiment of the present invention detects a radiation that has passed through a subject and captures a radiation image of the subject, and a radiation image When the imaging region of the subject to be imaged is fixed with respect to the position of the radiographic image capturing unit, the wireless signal from the wireless signal transmitter attached to the predetermined region of the subject is the first position. The first radio signal detector to detect the radio signal from the radio signal transmitter when the imaging part of the subject imaged as a radiographic image is fixed with respect to the position of the radiographic image capturing unit. A second wireless signal detector that detects at a second position different from the position, a wireless signal comparison unit that compares the wireless signal detected by the first wireless signal detector and the wireless signal detected by the second wireless signal detector; Comparison result by wireless signal comparator Based on the radiographic image, the positional relationship specifying unit that specifies the positional relationship between the position of the radiographic image capturing unit and the portion where the wireless signal transmitter is mounted, and the positional relationship specified by the positional relationship specifying unit are associated with the radiographic image. Output unit.

  The radio signal comparison unit compares the signal strength of the radio signal detected by the first radio signal detector with the signal strength of the radio signal detected by the second radio signal detector, and the positional relationship specifying unit is a radio signal comparison unit The positional relationship between the position of the radiographic image capturing unit and the part where the wireless signal transmitter is mounted may be specified based on the comparison result of the signal strength of the wireless signal.

  In the radiation imaging method according to the second aspect of the present invention, the imaging part of the subject that is imaged as a radiation image is positioned at the position of the radiation image capturing unit that detects the radiation transmitted through the subject and captures the radiation image. A first radio signal detection stage for detecting, at a first position, a radio signal from a radio signal transmitter attached to a predetermined part of the subject when the patient is fixed; A second radio signal detection stage for detecting a radio signal from the radio signal transmitter at a second position different from the first position when the imaging part of the subject is fixed with respect to the position of the radiographic image capturing unit; A radio signal comparison stage for comparing the radio signal detected in the first radio signal detection stage with the radio signal detected in the second radio signal detection stage, and a radiographic image based on the comparison result in the radio signal comparison stage The positional relationship specifying stage for specifying the positional relationship between the position of the image unit and the part where the wireless signal transmitter is mounted, and the output for outputting the positional relation specified in the positional relationship specifying stage in association with the radiation image Stages.

  According to a third aspect of the present invention, there is provided a program for a radiation imaging apparatus, wherein the radiation imaging apparatus detects a radiation transmitted through the subject and captures a radiation image of the subject, When the imaging part of the subject imaged as a radiographic image is fixed with respect to the position of the radiographic image capturing unit, a radio signal from a radio signal transmitter attached to a predetermined part of the subject is obtained. A first wireless signal detector for detecting at a first position; when an imaging part of a subject to be imaged as a radiographic image is fixed with respect to the position of the radiographic image capturing unit; A second radio signal detector for detecting at a second position different from the first position, a radio signal comparison unit for comparing the radio signal detected by the first radio signal detector with the radio signal detected by the second radio signal detector; Ratio by radio signal comparator Based on the results, the positional relationship identifying unit that identifies the positional relationship between the position of the radiographic image capturing unit and the part where the wireless signal transmitter is mounted, and the positional relationship identified by the positional relationship identifying unit correspond to the radiographic image It is made to function as an output unit that outputs.

  A radiation imaging apparatus according to a fourth aspect of the present invention includes a radiation image capturing unit that detects radiation transmitted through a subject and captures a radiation image of the subject, and a predetermined first part in the subject. A first radio signal detector that detects a radio signal from a radio signal transmitter when an imaging part of a subject to be imaged as a radiographic image is fixed with respect to the position of the radiographic image capturing unit. When the imaging part of the subject that is attached to a predetermined second part of the subject different from the first part and is captured as a radiographic image is fixed with respect to the position of the radiographic image capturing unit, A second radio signal detector for detecting a radio signal from the signal transmitter; a radio signal comparison unit for comparing the radio signal detected by the first radio signal detector with the radio signal detected by the second radio signal detector; , Ratio by wireless signal comparator Based on the result, the positional relationship specifying unit that specifies the positional relationship between the position of the radiographic image capturing unit and the part to which the wireless signal transmitter is mounted, and the positional relationship that is specified by the positional relationship specifying unit in the radiographic image And an output unit that outputs the data in association with each other.

  In the radiation imaging method according to the fifth aspect of the present invention, the imaging part of the subject that is imaged as a radiation image is positioned at the position of the radiation image capturing unit that detects the radiation transmitted through the subject and captures the radiation image. A first radio signal detection stage for detecting a radio signal from the radio signal transmitter by a first radio signal detector mounted on a predetermined first part of the subject when fixed to the subject; When the imaging part of the subject to be imaged as a radiographic image is fixed with respect to the position of the radiographic image capturing unit, the radio signal from the radio signal transmitter is determined in advance in the subject different from the first part. A second radio signal detection stage detected by a second radio signal detector attached to the second part, a radio signal detected in the first radio signal detection stage, and a radio signal detected in the second radio signal detection stage When A wireless signal comparison stage for comparison, and a positional relation identification stage for identifying a positional relation between the position of the radiographic image capturing unit and a portion on which the wireless signal transmitter is mounted based on the comparison result in the wireless signal comparison stage, An output stage for outputting the positional relation specified in the positional relation specifying stage in association with the radiation image.

  According to a sixth aspect of the present invention, there is provided a radiographic imaging apparatus program for detecting a radiation transmitted through a subject and capturing a radiographic image of the subject by using the radiation imaging apparatus. When the imaging part of the subject that is attached to the predetermined first part of the subject and is imaged as a radiographic image is fixed with respect to the position of the radiographic image capturing unit, the radio signal from the radio signal transmitter A first wireless signal detector for detecting a signal, the imaging part of the subject that is attached to a predetermined second part of the subject different from the first part and is imaged as a radiation image is the position of the radiation image capturing unit , A second radio signal detector for detecting a radio signal from the radio signal transmitter, a radio signal detected by the first radio signal detector, and a radio signal detected by the second radio signal detector Compare with wireless signal Based on the comparison result by the comparison unit and the wireless signal comparison unit, the positional relationship specifying unit and the positional relationship specifying unit for specifying the positional relationship between the position of the radiographic image capturing unit and the part where the wireless signal transmitter is mounted are specified. The positional relationship is made to function as an output unit that outputs the positional relationship in association with the radiation image.

  A radiation imaging apparatus according to a seventh aspect of the present invention includes a radiation image capturing unit that detects radiation transmitted through a subject and captures a radiation image of the subject, and imaging of the subject captured as a radiation image. When the part is fixed with the radiographic imaging unit in a predetermined first positional relationship, the specific part, which is the specific part of the subject, is set at a predetermined position where the specific part should be located. A part detection unit that detects whether or not a specific part exists, and a part detection that the specific part exists at a predetermined position when the imaging part of the subject is fixed in the first positional relationship The first positional relationship is specified as the positional relationship between the position of the radiographic image capturing unit and the specific site, and the imaging site of the subject is fixed in the first positional relationship. , The part that the specific part does not exist in the predetermined position A positional relationship identifying unit that identifies a second positional relationship different from the first positional relationship as a positional relationship between the position of the radiographic image capturing unit and the specific part when the exit unit is detected; and a positional relationship identifying unit An output unit that outputs the identified positional relationship in association with the radiation image.

  In the radiation imaging method according to the eighth aspect of the present invention, the imaging part of the subject that is imaged as a radiation image is predetermined as a radiation image capturing unit that detects radiation that has passed through the subject and captures the radiation image. Whether or not the specific part is present at a predetermined position where the specific part that is a predetermined part of the subject is to be located when fixed in the first positional relationship. When the part detection stage detects that the specific part exists in a predetermined position when the imaging part of the subject is fixed in the first positional relationship and the part detection stage detects the radiation, The first positional relationship is specified as the positional relationship between the position of the image capturing unit and the specific site, and the specific site is predetermined when the imaging site of the subject is fixed in the first positional relationship. At the site detection stage, it is not present at the position. If detected, the positional relationship is identified in a positional relationship identifying step that identifies a second positional relationship that is different from the first positional relationship as the positional relationship between the position of the radiographic image capturing unit and the specific portion, and the positional relationship identifying step. And an output stage for outputting the positional relationship in association with the radiation image.

  According to a ninth aspect of the present invention, there is provided a program for a radiation imaging apparatus, wherein the radiation imaging apparatus detects a radiation transmitted through the subject and captures a radiation image of the subject, When the imaging region of the subject to be imaged as a radiographic image is fixed in a predetermined first positional relationship with the radiographic image capturing unit, the specific region that is the predetermined specific region of the subject is A part detection unit that detects whether or not the specific part is present at a predetermined position to be positioned, and the specific part is predetermined when the imaging part of the subject is fixed in the first positional relationship. When the part detection unit detects that the position is present, the first positional relation is specified as the positional relation between the position of the radiographic imaging unit and the specific part, and the imaging part of the subject is the first When it is fixed in the position of 1 A position that specifies a second positional relationship different from the first positional relationship as a positional relationship between the position of the radiographic image capturing unit and the specific site when the site detecting unit detects that the site does not exist at a predetermined position The positional relationship specified by the relationship specifying unit and the positional relationship specifying unit is caused to function as an output unit that outputs the positional relationship in association with the radiation image.

  The above summary of the invention does not enumerate all the necessary features of the present invention, and sub-combinations of these feature groups can also be the invention.

  ADVANTAGE OF THE INVENTION According to this invention, the radiation imaging device which can record correctly the positional relationship between the radiation generator at the time of imaging and a subject can be provided.

  Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the invention according to the scope of claims, and all combinations of features described in the embodiments are included. It is not necessarily essential for the solution of the invention.

  FIG. 1 shows an example of a usage environment of a radiation imaging system 100 according to an embodiment. The radiation imaging system 100 includes a radiation imaging device 110, a communication path 150, a wireless communication device 152, diagnostic devices 115 a and 115 b (hereinafter collectively referred to as a diagnostic device 115), a server 170, and a database 172. The radiation imaging apparatus 110 includes a radiation detector 120, a control device 130, and a wireless transmitter 122 attached to the subject. The control device 130 includes a monitor 140, an input device 142, and a radiation source 132. The radiation detector 120 is provided with a wireless detector 134. The radiation source 132 may be an X-ray source. The diagnostic device 115a has a monitor 160a, and the diagnostic device 115b has a monitor 160b.

  The radiation imaging apparatus 110 captures a radiation image of the subject by the operation of the radiologist 180. The radiation imaging apparatus 110 may be a mobile radiation imaging apparatus, and the radiation imaging apparatus 110 captures a radiation image in a hospital room where the subject is located or the subject's home based on the operation of the radiation technician 180. be able to. The radiation imaging apparatus 110 acquires the imaging order of the subject from the server 170 through the communication path 150 and the wireless communication device 152 in the vicinity of the radiation imaging apparatus 110 before imaging the subject. The monitor 140 displays the subject ID, the subject's name, age, sex, weight, imaging location, and imaging direction included in the imaging order. The radiologist 180 determines imaging conditions based on the age, sex, weight, and imaging region displayed on the monitor 160 and inputs the imaging conditions from the input device 142. The imaging conditions include tube current, tube voltage, aperture diameter of the radiation source 132, and irradiation time. The radiation imaging apparatus 110 may receive imaging conditions from the server 170.

  The wireless detectors 134 are provided at a plurality of positions on the detection surface of the radiation detector 120. For example, the wireless detector 134 is provided at positions on the left and right sides of the detection surface of the radiation detector 120 when viewed from the direction in which the radiation detector 120 is irradiated with radiation. The wireless detector 134 detects the intensity of the wireless signal transmitted from the wireless transmitter 122 provided on the left wrist of the subject. Then, the radiation detector 120 specifies whether or not the chest side of the subject is facing the radiation detector 120 based on the difference in intensity of the wireless signal detected by the wireless detector 134, so that the imaging direction is determined. Specify whether it is PA or AP.

  When radiation is emitted from the radiation source 132, the radiation detector 120 generates a radiation image from a signal obtained according to the amount of radiation transmitted through the subject, associates the radiation image with the imaging direction, and performs communication. The data is transmitted to the server 170 through the route 150 and the wireless communication device 152. The server 170 associates the radiation image received from the radiation detector 120 with the imaging direction and stores it in the database 172. The diagnostic device 115 acquires the radiographic image and the imaging direction in association with each other from the database 172 in accordance with the operation of the doctors 190a and 190b (hereinafter collectively referred to as the doctor 190), and displays it on the monitor 160.

  Note that, for the convenience of the drawing, only one radiation imaging apparatus 110 is shown in the drawing, but the radiation imaging system 100 may include a plurality of radiation imaging apparatuses 110. Further, the recording of the image data and the series of communication control in the above may be performed according to the DICOM standard. In addition, the radiation detector 120 may include an imaging plate using a stimulable phosphor and a radiation film (including an intensifying screen) sensitive to radiation. The radiation detector 120 may be a solid radiation detector such as an FPD. The radiation in the present embodiment may be electromagnetic radiation such as X-rays and γ rays, or particle beams such as alpha rays.

  FIG. 2 shows an example of a block configuration of the radiation imaging apparatus 110. The radiation imaging apparatus 110 includes a first wireless signal detector 201, a second wireless signal detector 202, a radiation image imaging unit 280, a wireless signal comparison unit 220, a positional relationship specifying unit 230, a positional relationship storage unit 240, and a region detection unit 250. , A first heart rate signal detector 211, a second heart rate signal detector 212, a heart rate signal comparison unit 225, and an output unit 290. The site detection unit 250 includes a contact sensor 252. The wireless detector 134 is an example of the first wireless signal detector 201 and the second wireless signal detector 202, and the wireless transmitter 122 is an example of the wireless signal transmitter 270. The radiation detector 120 is an example of the radiation image capturing unit 280. The radiation imaging apparatus 110 may include a fixture (not shown) that fixes the subject. A chin rest 310 that is an example of a fixture will be described in FIG. 3 and subsequent figures, and a compression unit 910 and a placement unit 920 that are still another example of the fixture will be described with reference to FIGS. 9 and 10.

  The radiation image capturing unit 280 detects radiation that has passed through the subject and captures a radiation image of the subject. The first wireless signal detector 201 is attached to a predetermined part of the subject when the imaging part of the subject captured as a radiographic image is fixed with respect to the position of the radiographic image capturing unit 280. The wireless signal from the wireless signal transmitter 270 is detected at the first position. Further, the second wireless signal detector 202 receives the wireless signal from the wireless signal transmitter 270 when the imaging part of the subject captured as a radiation image is fixed with respect to the position of the radiation image capturing unit 280. Detection is performed at a second position different from the first position.

  The radio signal comparison unit 220 compares the radio signal detected by the first radio signal detector 201 with the radio signal detected by the second radio signal detector 202. Then, the positional relationship specifying unit 230 specifies the positional relationship between the position of the radiographic image capturing unit 280 and the part to which the wireless signal transmitter 270 is attached based on the comparison result by the wireless signal comparing unit 220. Then, the output unit 290 outputs the positional relationship specified by the positional relationship specifying unit 230 in association with the radiation image.

  Specifically, the radio signal comparison unit 220 compares the signal strength of the radio signal detected by the first radio signal detector 201 with the signal strength of the radio signal detected by the second radio signal detector 202. Then, the positional relationship specifying unit 230 determines the position between the position of the radiographic image capturing unit 280 and the part to which the wireless signal transmitter 270 is attached based on the comparison result of the signal strength of the wireless signal by the wireless signal comparing unit 220. Identify relationships.

  The positional relationship storage unit 240 associates the position of the radiographic image capturing unit 280 with the wireless signal transmitter in association with the difference between the wireless signal detected at the first position and the wireless signal detected at the second position. 270 stores the positional relationship with the part to which 270 is attached. Then, the radio signal comparison unit 220 calculates a difference between the radio signal detected by the first radio signal detector 201 and the radio signal detected by the second radio signal detector 202. Then, the positional relationship specifying unit 230 associates the positional relationship stored in the positional relationship storage unit 240 with the difference between the wireless signals calculated by the wireless signal comparison unit 220, and the position of the radiographic image capturing unit 280 and the wireless signal transmission. This is specified as a positional relationship with the part to which the device 270 is attached.

  More specifically, the positional relationship storage unit 240 correlates with the difference between the wireless signal detected at the first position and the wireless signal detected at the second position, and the imaging direction in which the imaging unit was imaged. Or the imaging region is stored. Then, the positional relationship specifying unit 230 specifies the imaging direction or imaging part stored in the positional relationship storage unit 240 in association with the difference between the wireless signals calculated by the wireless signal comparison unit 220. Then, the output unit 290 outputs the imaging direction or imaging region specified by the positional relationship specifying unit 230 in association with the radiation image.

  Further, the positional relationship storage unit 240 stores the PA direction and the AP direction as the imaging direction in association with the difference between the wireless signal detected at the first position and the wireless signal detected at the second position. Good. Then, the positional relationship specifying unit 230 may specify the imaging direction stored in the positional relationship storage unit 240 in association with the difference between the wireless signals calculated by the wireless signal comparison unit 220.

  In addition, the positional relationship storage unit 240 stores the LR direction and the RL direction as the imaging direction in association with the difference between the wireless signal detected at the first position and the wireless signal detected at the second position. Yes. Then, the positional relationship specifying unit 230 specifies the imaging direction stored in the positional relationship storage unit 240 in association with the difference between the wireless signals calculated by the wireless signal comparison unit 220. The difference between the radio signal detected at the first position and the radio signal detected at the second position is the difference between the radio signal detected at the first position and the radio signal detected at the second position. It may be a difference between. For example, the difference between the radio signal detected at the first position and the radio signal detected at the second position is the difference between the radio signal detected at the first position and the radio signal detected at the second position. Or a difference in phase between the radio signal detected at the first position and the radio signal detected at the second position.

  In addition, the first heart rate signal detector 211 is the first subject that is the position of the subject's body when the imaging region of the subject that is captured as a radiographic image is fixed with respect to the radiographic image capturing unit 280. A heartbeat signal at the examiner position is detected. Then, the second heart rate signal detector 212 is different from the first subject position when the imaging part of the subject imaged as a radiographic image is fixed with respect to the radiographic image imaging unit 280. The heartbeat signal at the second subject position, which is the position of the body, is detected. Then, the heartbeat signal comparison unit 225 compares the heartbeat signal detected by the first heartbeat signal detector 211 with the heartbeat signal detected by the second heartbeat signal detector 212. Then, the positional relationship specifying unit 230 specifies the positional relationship between the position of the radiation image capturing unit 280 and the position of the subject's heart based on the comparison result by the heartbeat signal comparing unit 225. Then, the output unit 290 outputs the positional relationship specified by the positional relationship specifying unit 230 in association with the radiation image.

  The heartbeat signal comparison unit 225 compares the signal phase of the heartbeat signal detected by the first heartbeat signal detector 211 with the signal phase of the heartbeat signal detected by the second heartbeat signal detector 212. Then, the positional relationship specifying unit 230 specifies the positional relationship between the position of the radiographic image capturing unit 280 and the position of the subject's heart based on the comparison result of the signal phase of the heartbeat signal by the heartbeat signal comparing unit 225. To do. The heartbeat signal comparison unit 225 may compare the signal strength of the heartbeat signal detected by the first heartbeat signal detector 211 with the signal strength of the heartbeat signal detected by the second heartbeat signal detector 212. The positional relationship specifying unit 230 specifies the positional relationship between the position of the radiographic image capturing unit 280 and the position of the subject's heart based on the comparison result of the signal intensity of the heartbeat signal by the heartbeat signal comparing unit 225. You can do it.

  Specifically, the positional relationship storage unit 240 associates the position of the radiation image capturing unit 280 with the subject's position in association with the difference between the heartbeat signal at the first subject position and the heartbeat signal at the second subject position. Stores the positional relationship between the heart position. Then, the heartbeat signal comparison unit 225 calculates a difference between the heartbeat signal detected by the first heartbeat signal detector 211 and the heartbeat signal detected by the second heartbeat signal detector 212. Then, the positional relationship specifying unit 230 associates the positional relationship stored in the positional relationship storage unit 240 with the difference between the heartbeat signals calculated by the heartbeat signal comparison unit 225 and the position of the radiation image capturing unit 280 and the subject. Specify the positional relationship between the heart position.

  Further, the positional relationship storage unit 240 stores the imaging direction or imaging region where the radiographic image was captured in association with the difference between the heartbeat signal at the first subject position and the heartbeat signal at the second subject position. Yes. Then, the positional relationship specifying unit 230 associates the imaging direction or imaging part stored in the positional relationship storage unit 240 with the position of the radiographic image imaging unit 280 in association with the difference between the heartbeat signals calculated by the heartbeat signal comparison unit 225. It is specified as a positional relationship with the position of the subject's heart. Then, the output unit 290 outputs the imaging direction or imaging region specified by the positional relationship specifying unit 230 in association with the radiation image.

  Specifically, the positional relationship storage unit 240 stores the imaging direction including the PA direction and the AP direction in association with the difference between the heartbeat signal at the first subject position and the heartbeat signal at the second subject position. ing. Then, the positional relationship specifying unit 230 associates the PA direction or the AP direction stored in the positional relationship storage unit 240 with the difference between the heart rate signals calculated by the heart rate signal comparison unit 225 as the position of the radiation image capturing unit 280. It is specified as a positional relationship with the position of the subject's heart.

  Further, the positional relationship storage unit 240 may store the imaging direction including the LR direction and the RL direction in association with the difference between the heartbeat signal at the first subject position and the heartbeat signal at the second subject position. Then, the positional relationship specifying unit 230 associates the LR direction and the RL direction stored in the positional relationship storage unit 240 with the difference between the heartbeat signals calculated by the heartbeat signal comparison unit 225 as the position of the radiation image capturing unit 280. It may be specified as a positional relationship between the position of the subject's heart.

  The first heart rate signal detector 211 and the second heart rate signal detector 212 are in contact with different subject positions in the subject when the subject's imaging part is fixed with respect to the radiation image capturing unit 280. It may be provided at a position where

  For example, the fixing tool contacts at least a part of the left half of the subject and the right half of the subject, and fixes the subject to the radiation image capturing unit 280. The first heart rate signal detector 211 and the second heart rate signal detector 212 are provided on a contact surface that contacts the subject in the fixture. Then, the first heart rate signal detector 211 and the second heart rate signal detector 212 detect heart rate signals in the left half body and the right half body of the subject in contact with the contact surface, respectively.

  Specifically, the fixture may be a handle that the subject holds with both hands to fix the posture. At this time, the first heart rate signal detector 211 is provided on the contact surface where the left hand of the subject contacts with the handle, and detects the heart rate signal of the subject from the left hand of the subject. The second heart rate signal detector 212 is provided on a contact surface where the right hand of the subject contacts with the handle, and detects the heart rate signal of the subject from the right hand of the subject.

  The fixing tool may be in contact with the imaging region of the subject and fix the imaging region of the subject to the radiation image capturing unit 280. The first heart rate signal detector 211 and the second heart rate signal detector 212 are provided on the contact surface that contacts the imaging region of the subject in the fixture, and the first subject of the subject that contacts the contact surface, respectively. Heartbeat signals at the examiner position and the second subject position are detected. The positional relationship storage unit 240 captures an image of the imaging unit in association with the difference between the heartbeat signal at the first subject position in contact with the contact surface and the heartbeat signal at the second subject position in contact with the contact surface. The imaged part is stored. Then, the positional relationship specifying unit 230 associates the imaging region stored in the positional relationship storage unit 240 with the difference calculated by the heartbeat signal comparison unit 225, the position of the radiographic image capturing unit 280, and the heart of the subject. It is specified as a positional relationship between the positions.

  The part detection unit 250 specifies a predetermined subject when the imaging part of the subject to be imaged as a radiographic image is fixed with the radiographic image capturing unit 280 in a predetermined first positional relationship. It is detected whether or not the specific part is present at a predetermined position where the specific part is to be located. The positional relationship specifying unit 230 is configured to detect radiation when the site detection unit 250 detects that the specific site exists at a predetermined position when the imaging site of the subject is fixed in the first positional relationship. As the positional relationship between the position of the image capturing unit 280 and the specific part, the first positional relation is specified, and the specific part is determined in advance when the imaging part of the subject is fixed in the first positional relation. When the part detection unit 250 detects that the position does not exist, the second positional relation different from the first positional relation is specified as the positional relation between the position of the radiation image capturing unit 280 and the specific part. The output unit 290 then outputs the positional relationship specified by the positional relationship specifying unit 230 in association with the radiation image.

  The contact sensor 252 is provided on a contact surface to be contacted with the specific part when the imaging part of the subject is fixed in the first positional relationship with the radiographic image capturing unit 280, and is the contact sensor 252 in contact with the specific part? Detect whether or not. And the positional relationship specific | specification part 230 is a radiation image imaging part, when it detects that the contact sensor 252 is contacting the specific site | part when the imaging site | part of a subject is fixed by 1st positional relationship. When the first positional relationship is specified as the positional relationship between the position of 280 and the specific part, and the imaging part of the subject is fixed in the first positional relation, the contact sensor 252 contacts the specific part. When it is detected that the position is not detected, a second positional relationship different from the first positional relationship is specified as the positional relationship between the position of the radiation image capturing unit 280 and the specific part.

  FIG. 3 shows a perspective view of an example of the radiation detector 120. 4 shows a side view of the radiation detector 120 viewed from the detection surface 300 side. FIG. 5 shows a side view of the radiation detector 120 viewed from the right side.

  The radiation detector 120 includes a wireless sensor 351, a wireless sensor 352, a handle 391, a handle 392, an electrocardiographic sensor 331, an electrocardiographic sensor 332, a chin rest 310, and a chin sensor 320. The radiation detector 120 detects radiation incident from the detection surface 300. The wireless sensor 351 and the wireless sensor 352 are examples of the first wireless signal detector 201 and the second wireless signal detector 202, respectively. The electrocardiographic sensor 331 and the electrocardiographic sensor 332 are examples of the first heartbeat signal detector 211 and the second heartbeat signal detector 212, respectively. The jaw sensor 320 is an example of the contact sensor 252.

  The chin sensor 320 is provided at a substantially central portion of the chin rest 310. When the subject's chin is placed on the chin rest 310, a change in pressure applied by the subject's chin, a change in capacitance, and the like. By detecting the above, it is detected that the subject's chin is placed on the chin rest 310.

  The electrocardiographic sensor 331 and the electrocardiographic sensor 332 are provided on the handle 391 and the handle 392, respectively. At the time of imaging, the subject's posture is fixed by holding the handle 391 and the handle 392 with his hand or passing his / her arm. The electrocardiographic sensor 331 and the electrocardiographic sensor 332 are provided at portions where the subject's hand or arm contacts the handle 391 and the handle 392, respectively, when the subject's body position is fixed. The electrocardiographic sensor 331 and the electrocardiographic sensor 332 detect the electrocardiographic signal of the subject from the subject's hand or arm.

  Further, the wireless sensor 351 and the wireless sensor 352 are provided on the right side and the left side of the radiation detector 120 when viewed from the detection surface 300, respectively. For example, the wireless sensor 351 and the wireless sensor 352 may be provided on the right side and the left side of the radiation detector 120, respectively. Note that the wireless sensor 351 and the wireless sensor 352 may be provided in the vicinity of the electrocardiographic sensor 331 and the electrocardiographic sensor 332, respectively.

  For example, when the subject takes a chest radiograph in the PA direction, the subject places his / her chin on the chin rest 310, holds the handle 391 with the right hand, and holds the handle 392 with the left hand to fix the posture. Thereby, the chin sensor 320 detects that the subject's chin is placed, and the electrocardiographic sensor 331 and the electrocardiographic sensor 332 can detect electrocardiographic signals from the subject's right hand and left hand, respectively. The wireless sensor 351 and the wireless sensor 352 detect a wireless signal from the wireless transmitter 122 provided on the left hand of the subject.

  On the other hand, in the case of AP imaging, the subject does not place his / her chin on the chin rest 310, wraps the inner arm of the left arm around the handle 391, and fixes the posture by wrapping the inner arm of the right arm around the handle 392. To do. Thereby, the electrocardiogram sensor 331 and the electrocardiogram sensor 332 detect the electrocardiogram signals from the left arm and the right arm, respectively. The wireless sensor 351 and the wireless sensor 352 detect a wireless signal from the wireless transmitter 122 provided on the left wrist of the subject.

  As described above, there is a difference in detection results between the jaw direction 320, the electrocardiographic sensor 331, the electrocardiographic sensor 332, the wireless sensor 351, and the wireless sensor 352 between the PA direction and the AP direction. Thereby, it is possible to determine whether the shooting direction is the PA direction or the AP direction. For example, it can be determined which of the jaws is facing depending on whether or not the output of the jaw sensor 320 is present. Further, it can be seen from the difference in intensity between the wireless signals detected by the wireless sensor 351 and the wireless sensor 352 that the wireless transmitter 122 is closer to the wireless sensor 351 or the wireless sensor 352. Further, from the difference between the electrocardiographic signals detected by the electrocardiographic sensor 331 and the electrocardiographic sensor 332, it can be determined whether the handle 391 and the handle 392 are in contact with either the right arm or the left arm of the subject. As described above, according to the radiation imaging apparatus 110, it is possible to determine which of the PA direction and the AP direction is taken in a form that can be mutually checked by the output of each sensor.

  FIG. 5 shows a state in which the subject is taking a chest radiograph in the LR direction. In this case, the subject fixes his / her posture by grasping the support bar 591 with his / her hand. The electrocardiographic sensor 431 and the electrocardiographic sensor 432 are provided in a portion where the subject holds the support bar 591 with his / her hand. When the image is taken in the LR direction as shown in FIG. 5, the electrocardiographic sensor 431 is in contact with the subject's right hand, and the electrocardiographic sensor 432 is in contact with the subject's left hand. On the other hand, when the subject is photographed in the RL direction, the electrocardiographic sensor 431 contacts the left hand of the subject and the electrocardiographic sensor 432 contacts the right hand of the subject. Further, in both the LR direction and the RL direction, the wireless signal 351 and the wireless sensor 352 detect substantially the same intensity ratio of the wireless signal detected from the wireless transmitter 122. From the relationship between the output results of each sensor, it can be determined whether the subject has been imaged in the LR direction or the RL direction.

  As described above, the chin rest 310 mounts the subject's chin to fix the posture of the subject when imaging the subject in the PA direction. The contact sensor 252 is provided on the placement surface on which the subject on the chin rest 310 places the jaw, and detects whether or not the subject is in contact with the subject's jaw. When the positional relationship specifying unit 230 detects that the contact sensor 252 is in contact with the subject's jaw when the imaging region of the subject is fixed in the first positional relationship, the radiation relationship is determined. When the PA direction is specified as the positional relationship between the position of the image capturing unit 280 and the specific site, and the imaging site of the subject is fixed in the first positional relationship, the contact sensor 252 is the jaw of the subject. When it is detected that it is not touching, the AP direction is specified as the positional relationship between the position of the radiation image capturing unit 280 and the specific part.

  FIG. 6 shows an example of an imaging flow by the radiation imaging apparatus 110. When an imaging start instruction is given (S602), the radiation detector 120 acquires the output of the jaw sensor 320 (S604). The radiation detector 120 acquires the outputs of the electrocardiographic sensor 331 and the electrocardiographic sensors 332, 431, and 432 (S606). The radiation detector 120 acquires the outputs of the wireless sensors 351 and 352 (S608).

  The positional relationship corresponding to the output of each sensor (chin sensor 320, electrocardiographic sensors 331, 332, 431, and 432, and wireless sensors 351 and 352) is the positional relationship stored in the positional relationship storage unit 240. It is determined whether or not it exists inside (S610). Note that a specific method of determining the positional relationship in S610 will be described with reference to FIG. If it is determined in S610 that there is a positional relationship corresponding to the output of each sensor, the positional relationship (for example, PA, AP, LR, RL direction) corresponding to the output of each sensor is acquired from the positional relationship storage unit 240. (S612). Then, an X-ray image is captured by the radiation detector 120 (S614), the positional relationship is recorded on the captured X-ray image (S616), and the process is terminated.

  If it is determined in S610 that there is no positional relationship corresponding to the output of each sensor, a warning is issued (S618), and the process ends. As described above, according to the radiation imaging apparatus 110 in the present embodiment, it is possible to appropriately specify the imaging direction and to record the X-ray image attached thereto. Further, according to the radiation imaging apparatus 110, it is possible to prevent the imaging from being executed in a situation where the imaging direction cannot be specified by checking the outputs of the sensors with each other.

  FIG. 7 shows an example of an electrocardiographic signal detected by the electrocardiographic sensor 331 and the electrocardiographic sensor 332. On the upper side of the figure, an example of the electrocardiographic signal when the electrocardiographic sensor 332 and the electrocardiographic sensor 331 detect the electrocardiographic signal from the left hand and the right hand (hereinafter referred to as pattern A) is shown. On the lower side, an example of an electrocardiographic signal when the electrocardiographic sensor 332 and the electrocardiographic sensor 331 detect an electrocardiographic signal from the right hand and the left hand (hereinafter, pattern B) is shown.

  The heartbeat signal comparison unit 225 calculates a time difference ΔT1 from timing t702 when the electrocardiogram signal detected by the electrocardiogram sensor 332 reaches the peak value to timing t701 when the electrocardiogram signal detected by the electrocardiogram sensor 331 reaches the peak value. calculate. For example, in pattern B, the length of time difference ΔT1 is longer than in pattern A. Therefore, the heart rate signal comparison unit 225 can identify whether the electrocardiographic sensor 331 and the electrocardiographic sensor 332 detect the heart rate signal from the left or right hand according to the length of the time difference ΔT1, and as a result PA or It is possible to specify which of the APs is used for shooting.

  In the above description, the case of specifying PA or AP from the electrocardiogram signals obtained by the electrocardiogram sensor 331 and the electrocardiogram sensor 332 has been described. For the ECG sensor 431 and the ECG sensor 432, the ECG signal detected by the ECG sensor 431 reaches the peak value after the ECG signal detected by the ECG sensor 432 reaches the peak value by the same processing. Depending on the length of the time difference ΔT2 to reach, it is possible to specify which of LR and RL is used for shooting.

  FIG. 8 shows an example of data stored in the positional relationship storage unit 240 in a table format. The positional relationship storage unit 240 is associated with the conditions related to the output of the jaw sensor 320 (ON or OFF), the conditions related to the intensity difference ΔI of the wireless signal, and the conditions related to the time difference of the heartbeat peak (PA, AP, LR, And RL). Note that ΔT1 and ΔT2 are time differences until the electrocardiographic signal reaches the peak value, as described with reference to FIG. ΔT0 is a predetermined reference value, and may be, for example, about half the heartbeat interval of a human being in a resting state. For example, ΔT0 may be determined based on a heartbeat interval indicated by an electrocardiographic signal obtained from at least one of the electrocardiographic sensors 331, 332, 431, and 432. In addition, I351 and I352 indicate the strengths of the wireless signals detected by the wireless sensor 351 and the wireless sensor 352, respectively.

  The positional relationship storage unit 240 stores information indicating that PA shooting is performed when the output of the jaw sensor 320 is ON, I352-I351 is greater than ΔI0, and ΔT1 is smaller than ΔT0. Here, ΔI0 is assumed to be a positive value. In addition, the positional relationship storage unit 240 stores that AP shooting is performed when the output of the jaw sensor 320 is OFF, I351-I352 is greater than ΔI0, and ΔT1 is greater than ΔT0.

  Further, the positional relationship storage unit 240 stores the fact that the LR shooting is performed when the output of the jaw sensor 320 is OFF, the absolute value of I352-I351 is smaller than a predetermined value ΔI1, and ΔT2 is smaller than ΔT0. is doing. Further, the positional relationship storage unit 240 stores information indicating that the RL photographing is performed when the output of the jaw sensor 320 is OFF, the absolute value of I352-I351 is smaller than a predetermined value ΔI1, and ΔT2 is larger than ΔT0. is doing.

  Then, the positional relationship specifying unit 230 is configured so that the positional relationship storage unit 240 correlates with a combination of a condition that the condition related to the output of the jaw sensor 320, the condition related to the intensity difference ΔI of the wireless signal, and the condition related to the time difference of the heartbeat peak. Select the stored shooting direction. Further, the positional relationship specifying unit 230 notifies a warning when the output of each sensor does not match the combination of conditions shown in FIG. 8 (S618 in FIG. 6). In this way, the positional relationship storage unit 240 can specify an appropriate shooting direction. In addition, it is possible to prevent the shooting from being performed in a state where the shooting direction cannot be specified from the output of each sensor. The first heart rate signal detector 211 and the second heart rate signal detector 212 may be a heart sound sensor that acquires a heart sound signal as a heart rate signal in addition to 331, 332, 431, and 432.

  FIG. 9 shows a mammography apparatus 930 in another example of the radiation imaging apparatus 110. The mammography apparatus 930 includes a placement unit 920 that places the breast 950 and a compression unit 910 that compresses the breast 950. The placement unit 920 and the compression unit 910 function as a fixture in the present invention, and the breast 950 of the subject is fixed by the placement unit 920 and the compression unit 910.

  FIG. 10 shows an example of the arrangement of the electrocardiographic sensor 1031 and the electrocardiographic sensor 1032 on the placement surface 925 of the placement unit 920. Both the electrocardiographic sensor 1031 and the electrocardiographic sensor 1032 are provided on the placement surface 925 at a position closer to the subject than the center of the placement surface 925. The electrocardiographic sensor 1031 and the electrocardiographic sensor 1032 are provided on the left side and the right side, respectively, as viewed from the subject.

  When the imaging region is the right breast (right breast), the electrocardiographic sensor 1031 is located closer to the heart than the electrocardiographic sensor 1032, and as described with reference to FIG. A significant shift occurs. On the other hand, when the imaging region is the left breast (left chest), the distance from the electrocardiographic sensor 1031 to the heart is not significantly different from the distance from the electrocardiographic sensor 1032 to the heart, and the timing at which the electrocardiographic signal reaches its peak value. The shift is smaller than when the imaging region is the right breast (right breast).

  FIG. 11 shows an example of the part data stored in the positional relationship storage unit 240 in a table format. Here, ΔT3 is a time difference between the timing when the electrocardiogram signal detected by the electrocardiogram sensor 1031 reaches the peak value and the timing when the electrocardiogram signal detected by the electrocardiogram sensor 1032 reaches the peak value. The positional relationship storage unit 240 stores imaging regions (left chest and right chest) in association with the time difference ΔT3. Specifically, the positional relationship storage unit 240 stores the imaging region (left chest and right chest) in association with a condition indicating whether or not the time difference ΔT3 is larger than a predetermined value ΔT.

  The heartbeat signal comparison unit 225 calculates ΔT3 based on the time changes of the electrocardiographic signals of the electrocardiographic sensor 1031 and the electrocardiographic sensor 1032. Then, the positional relationship specifying unit 230 selects a region stored in the positional relationship storage unit 240 in association with a condition that the time difference ΔT3 matches as an imaging region. For example, the positional relationship specifying unit 230 specifies the left breast as an imaging part when ΔT3 is smaller than a predetermined time difference ΔT, and specifies the right breast as an imaging part when ΔT3 is equal to or greater than a predetermined time difference ΔT. To do.

  Note that the electrocardiographic sensor 1031 and the electrocardiographic sensor 1032 may be provided in the compression unit 910. In addition to the electrocardiographic sensor 1031 and the electrocardiographic sensor 1032, the first heartbeat signal detector 211 and the second heartbeat signal detector 212 may be a heart sound sensor that acquires a heart sound signal as a heartbeat signal.

  As described above, when the radiation imaging apparatus 110 is an apparatus that captures a radiographic image of a breast, the fixture is placed between the mounting unit 920 and the mounting unit 920 that mount the breast that is the imaging region of the subject. A compression part 910 that compresses the breast by sandwiching the breast in At this time, the first heart rate signal detector 211 and the second heart rate signal detector 212 are provided on the placement unit 920 or the compression unit 910, and the first heart rate signal detector 211 and the second heart rate signal detector 212 are in contact with the placement unit 920 or the compression unit 910. Heartbeat signals at the first subject position and the second subject position are detected. The positional relationship storage unit 240 includes a heartbeat signal at the first subject position that contacts the placement unit 920 or the compression unit 910 and a heartbeat signal at the second subject position that contacts the placement unit 920 or the compression unit 910. Corresponding to the difference, the imaging region including the right breast and the left breast is stored. Then, the positional relationship specifying unit 230 associates the right breast or the left breast stored in the positional relationship storage unit 240 with the difference calculated by the heartbeat signal comparison unit 225 as the position of the radiation image capturing unit 280 and the subject. Specify the positional relationship between the heart position.

  As described above, according to the radiation imaging apparatus 110 of the present embodiment, imaging directions such as PA, AP, LR, and RL, or imaging sites such as the right and left breasts are appropriately specified, and a radiographic image is obtained. Can be recorded. In addition, it is possible to prevent an image from being shot without properly specifying the imaging direction.

  In the embodiment described above, the radio signal transmitter 270 is provided on the subject, and the signal from the radio signal transmitter 270 is detected on the radiation imaging apparatus 110 side. In another form, the radio signal transmitter 270 may be provided on the radiation imaging apparatus 110 side, and the first radio signal detector 201 and the second radio signal detector 202 may be provided on the subject side. In this case, the first wireless signal detector 201 is attached to a predetermined first part of the subject, and the imaging part of the subject to be imaged as a radiographic image is relative to the position of the radiographic image capturing unit 280. When fixed, the wireless signal from the wireless signal transmitter 270 is detected. The second wireless signal detector 202 is attached to a predetermined second part of the subject different from the first part, and the imaging part of the subject to be imaged as a radiographic image is the radiation image capturing unit 280. When fixed with respect to the position, the wireless signal from the wireless signal transmitter 270 is detected.

  The radio signal comparison unit 220 compares the radio signal detected by the first radio signal detector 201 with the radio signal detected by the second radio signal detector 202. Then, the positional relationship specifying unit 230 specifies the positional relationship between the position of the radiographic image capturing unit 280 and the part to which the wireless signal transmitter 270 is attached based on the comparison result by the wireless signal comparing unit 220. Then, the output unit 290 outputs the positional relationship specified by the positional relationship specifying unit 230 in association with the radiation image.

  FIG. 12 shows an exemplary hardware configuration of the radiation imaging apparatus 110. The radiation imaging apparatus 110 includes a CPU peripheral unit having a CPU 1505, a RAM 1520, a graphic controller 1575, and a display device 1580 connected to each other by a host controller 1582, and communication connected to the host controller 1582 by an input / output controller 1584. An input / output unit having an interface 1530, a hard disk drive 1540, and a CD-ROM drive 1560, and a legacy input / output unit having a ROM 1510, a flexible disk drive 1550, and an input / output chip 1570 connected to the input / output controller 1584. .

  The host controller 1582 connects the RAM 1520, the CPU 1505 that accesses the RAM 1520 at a high transfer rate, and the graphic controller 1575. The CPU 1505 operates based on programs stored in the ROM 1510 and the RAM 1520 and controls each unit. The graphic controller 1575 acquires image data generated by the CPU 1505 and the like on a frame buffer provided in the RAM 1520 and displays the image data on the display device 1580. Alternatively, the graphic controller 1575 may include a frame buffer that stores image data generated by the CPU 1505 or the like.

  The input / output controller 1584 connects the host controller 1582 to the hard disk drive 1540, the communication interface 1530, and the CD-ROM drive 1560, which are relatively high-speed input / output devices. The hard disk drive 1540 stores programs and data used by the CPU 1505. The communication interface 1530 is connected to the network communication device 1598 to transmit / receive programs or data. The CD-ROM drive 1560 reads a program or data from the CD-ROM 1595 and provides it to the hard disk drive 1540 and the communication interface 1530 via the RAM 1520.

  The input / output controller 1584 is connected to the ROM 1510, the flexible disk drive 1550, and the relatively low-speed input / output device of the input / output chip 1570. The ROM 1510 stores a boot program executed when the radiation imaging apparatus 110 is started, a program depending on the hardware of the radiation imaging apparatus 110, and the like. The flexible disk drive 1550 reads a program or data from the flexible disk 1590 and provides it to the hard disk drive 1540 and the communication interface 1530 via the RAM 1520. The input / output chip 1570 connects various input / output devices via a flexible disk drive 1550 and, for example, a parallel port, a serial port, a keyboard port, a mouse port, and the like.

  A program executed by the CPU 1505 is stored in a recording medium such as the flexible disk 1590, the CD-ROM 1595, or an IC card and provided by the user. The program stored in the recording medium may be compressed or uncompressed. The program is installed in the hard disk drive 1540 from the recording medium, read into the RAM 1520, and executed by the CPU 1505.

  The program executed by the CPU 1505 includes the radiation imaging apparatus 110, the first wireless signal detector 201, the second wireless signal detector 202, the radiation image capturing unit 280, and the wireless signal comparison described with reference to FIGS. Unit 220, positional relationship specifying unit 230, positional relationship storage unit 240, part detection unit 250, first heart rate signal detector 211, second heart rate signal detector 212, heart rate signal comparison unit 225, output unit 290, and contact sensor 252 To function as.

  The program shown above may be stored in an external storage medium. As the storage medium, in addition to the flexible disk 1590 and the CD-ROM 1595, an optical recording medium such as a DVD or PD, a magneto-optical recording medium such as an MD, a tape medium, a semiconductor memory such as an IC card, or the like can be used. Further, a storage device such as a hard disk or a RAM provided in a server system connected to a dedicated communication network or the Internet may be used as a recording medium, and the program may be provided to the radiation imaging apparatus 110 via the network.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

1 is a diagram illustrating an example of a usage environment of a radiation imaging system 100. FIG. It is a figure which shows an example of the block configuration of the radiation imaging device. 2 is a perspective view of an example of a radiation detector 120. FIG. It is a figure which shows the side view which looked at the radiation detector 120 from the detection surface 300 side. It is a figure which shows the side view which looked at the radiation detector 120 from the right side. It is a figure which shows an example of the imaging | photography flow by the radiation imaging device. It is a figure which shows an example of the electrocardiogram signal which the electrocardiograph sensors 331 and 332 detect. It is a figure which shows an example of the data which the positional relationship storage part 240 has stored in the table format. It is a figure which shows the mammography apparatus 930 in another example of the radiation imaging device 110. It is a figure which shows an example of arrangement | positioning of the electrocardiogram sensors 1031 and 1032. It is a figure which shows an example of the site | part data which the positional relationship storage part 240 has stored in the table format. It is a figure which shows an example of the hardware constitutions of the radiation imaging device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Radiation imaging system 110 Radiation imaging device 115 Diagnosis device 120 Radiation detector 122 Wireless transmitter 130 Control device 132 Radiation source 134 Wireless detector 136 Heart rate signal detector 140 Monitor 142 Input device 150 Communication path 152 Wireless communication device 160 Monitor 170 Server 172 Database 180 Radiologist 190 Doctor 201 First wireless signal detector 202 Second wireless signal detector 211 First heart rate signal detector 212 Second heart rate signal detector 220 Wireless signal comparison unit 225 Heart rate signal comparison unit 230 Position relation specifying unit 240 Position relationship storage unit 250 Site detection unit 252 Contact sensor 270 Radio signal transmitter 280 Radiation image capturing unit 290 Output unit 310 Jaw 920 Placement unit 910 Compression unit

Claims (16)

A radiation image capturing unit that detects radiation transmitted through the subject and captures a radiation image of the subject; and
A radio signal from a radio signal transmitter attached to a predetermined site in the subject when the imaging site of the subject imaged as the radiographic image is fixed with respect to the position of the radiographic image capturing unit A first wireless signal detector for detecting at a first position;
When the imaging part of the subject imaged as the radiographic image is fixed with respect to the position of the radiographic image capturing unit, a radio signal from the radio signal transmitter is detected at a second position different from the first position. A second wireless signal detector that,
A wireless signal comparison unit that compares the wireless signal detected by the first wireless signal detector with the wireless signal detected by the second wireless signal detector;
Based on the comparison result by the wireless signal comparison unit, a positional relationship specifying unit that specifies the positional relationship between the position of the radiographic image capturing unit and the part to which the wireless signal transmitter is mounted;
A radiation imaging apparatus comprising: an output unit that outputs the positional relationship specified by the positional relationship specifying unit in association with the radiation image. The wireless signal comparison unit compares the signal strength of the wireless signal detected by the first wireless signal detector with the signal strength of the wireless signal detected by the second wireless signal detector;
The positional relationship specifying unit is configured to determine a positional relationship between the position of the radiographic image capturing unit and a portion where the wireless signal transmitter is mounted based on a comparison result of signal strength of the wireless signal by the wireless signal comparing unit. The radiation imaging apparatus according to claim 1 to be specified. Corresponding to the difference between the radio signal detected at the first position and the radio signal detected at the second position, the position of the radiographic image capturing unit and the part where the radio signal transmitter is mounted A positional relationship storage unit for storing the positional relationship between
The wireless signal comparison unit calculates a difference between the wireless signal detected by the first wireless signal detector and the wireless signal detected by the second wireless signal detector;
The positional relationship specifying unit associates the positional relationship stored in the positional relationship storage unit with the difference between the wireless signals calculated by the wireless signal comparison unit, the position of the radiographic image capturing unit, and the wireless signal transmitter. The radiation imaging apparatus according to claim 1, wherein the radiation imaging apparatus is specified as a positional relationship with a part to which is attached. The positional relationship storage unit correlates with a difference between the wireless signal detected at the first position and the wireless signal detected at the second position, and the imaging direction or imaging part in which the imaging unit was imaged. And store
The positional relationship specifying unit specifies an imaging direction or an imaging region stored in the positional relationship storage unit in association with a difference between wireless signals calculated by the wireless signal comparison unit,
The radiation output apparatus according to claim 3, wherein the output unit outputs the imaging direction or imaging region specified by the positional relationship specifying unit in association with the radiation image. The positional relationship storage unit stores a PA direction and an AP direction as imaging directions in association with a difference between the wireless signal detected at the first position and the wireless signal detected at the second position. And
5. The radiation imaging apparatus according to claim 4, wherein the positional relationship specifying unit specifies an imaging direction stored in the positional relationship storage unit in association with a difference between wireless signals calculated by the wireless signal comparison unit. The positional relationship storage unit stores the LR direction and the RL direction as imaging directions in association with a difference between the wireless signal detected at the first position and the wireless signal detected at the second position. And
5. The radiation imaging apparatus according to claim 4, wherein the positional relationship specifying unit specifies an imaging direction stored in the positional relationship storage unit in association with a difference between wireless signals calculated by the wireless signal comparison unit. When the imaging part of the subject imaged as a radiographic image is fixed with respect to the position of the radiographic image capturing unit that detects the radiation transmitted through the subject and captures the radiographic image, A first wireless signal detection step of detecting a wireless signal from a wireless signal transmitter attached to a predetermined part at a first position;
When the imaging part of the subject imaged as the radiographic image is fixed with respect to the position of the radiographic image capturing unit, a radio signal from the radio signal transmitter is detected at a second position different from the first position. A second wireless signal detection stage to:
A wireless signal comparison step of comparing the wireless signal detected in the first wireless signal detection step with the wireless signal detected in the second wireless signal detection step;
Based on the comparison result in the wireless signal comparison step, a positional relationship specifying step for specifying a positional relationship between the position of the radiographic image capturing unit and the portion on which the wireless signal transmitter is mounted;
A radiation imaging method comprising: an output step of outputting the positional relationship specified in the positional relationship specifying step in association with the radiation image. A program for a radiation imaging apparatus, wherein the radiation imaging apparatus is
A radiation image capturing unit that detects radiation transmitted through the subject and captures a radiation image of the subject;
A radio signal from a radio signal transmitter attached to a predetermined site in the subject when the imaging site of the subject imaged as the radiographic image is fixed with respect to the position of the radiographic image capturing unit A first wireless signal detector for detecting at a first position;
When the imaging part of the subject imaged as the radiographic image is fixed with respect to the position of the radiographic image capturing unit, a radio signal from the radio signal transmitter is detected at a second position different from the first position. A second wireless signal detector,
A wireless signal comparison unit that compares the wireless signal detected by the first wireless signal detector with the wireless signal detected by the second wireless signal detector;
Based on the comparison result by the wireless signal comparison unit, a positional relationship specifying unit that specifies the positional relationship between the position of the radiographic image capturing unit and the part to which the wireless signal transmitter is mounted,
A program that functions as an output unit that outputs the positional relationship specified by the positional relationship specifying unit in association with the radiation image. A radiation image capturing unit that detects radiation transmitted through the subject and captures a radiation image of the subject; and
When the imaging part of the subject that is attached to a predetermined first part of the subject and is imaged as the radiographic image is fixed with respect to the position of the radiographic image capturing unit, from the radio signal transmitter A first wireless signal detector for detecting a wireless signal;
When the imaging part of the subject that is attached to a predetermined second part in the subject different from the first part and is captured as the radiation image is fixed with respect to the position of the radiation image capturing unit, A second radio signal detector for detecting a radio signal from the radio signal transmitter;
A wireless signal comparison unit that compares the wireless signal detected by the first wireless signal detector with the wireless signal detected by the second wireless signal detector;
Based on the comparison result by the wireless signal comparison unit, a positional relationship specifying unit that specifies the positional relationship between the position of the radiographic image capturing unit and the part to which the wireless signal transmitter is mounted;
A radiation imaging apparatus comprising: an output unit that outputs the positional relationship specified by the positional relationship specifying unit in association with the radiation image. A radio signal transmitter when an imaging part of a subject imaged as a radiographic image is fixed with respect to a position of a radiographic image capturing unit that detects radiation transmitted through the subject and images the radiographic image A first wireless signal detection step of detecting a wireless signal from the first wireless signal detector mounted on a predetermined first part of the subject;
When the imaging part of the subject imaged as the radiographic image is fixed with respect to the position of the radiographic image capturing unit, the radio signal from the radio signal transmitter is different from the first part. A second radio signal detection step of detecting by a second radio signal detector mounted on a predetermined second part of
A wireless signal comparison step of comparing the wireless signal detected in the first wireless signal detection step with the wireless signal detected in the second wireless signal detection step;
Based on the comparison result in the wireless signal comparison step, a positional relationship specifying step for specifying a positional relationship between the position of the radiographic image capturing unit and the portion on which the wireless signal transmitter is mounted;
A radiation imaging method comprising: an output step of outputting the positional relationship specified in the positional relationship specifying step in association with the radiation image. A program for a radiation imaging apparatus, wherein the radiation imaging apparatus is
A radiation image capturing unit that detects radiation transmitted through the subject and captures a radiation image of the subject;
When the imaging part of the subject that is attached to the predetermined first part of the subject and is imaged as the radiographic image is fixed with respect to the position of the radiographic image capturing unit, from the radio signal transmitter A first wireless signal detector for detecting a wireless signal;
When the imaging part of the subject that is attached to a predetermined second part in the subject different from the first part and is captured as the radiation image is fixed with respect to the position of the radiation image capturing unit, A second radio signal detector for detecting a radio signal from the radio signal transmitter;
A wireless signal comparison unit that compares the wireless signal detected by the first wireless signal detector with the wireless signal detected by the second wireless signal detector;
Based on the comparison result by the wireless signal comparison unit, a positional relationship specifying unit that specifies the positional relationship between the position of the radiographic image capturing unit and the part to which the wireless signal transmitter is mounted,
A program that functions as an output unit that outputs the positional relationship specified by the positional relationship specifying unit in association with the radiation image. A radiation image capturing unit that detects radiation transmitted through the subject and captures a radiation image of the subject; and
A specific part that is a predetermined specific part of the subject when the imaging part of the subject imaged as the radiographic image is fixed in a predetermined first positional relationship with the radiographic image capturing unit. A site detection unit for detecting whether or not the specific site exists at a predetermined position where
When the part detection unit detects that the specific part exists at the predetermined position when the imaging part of the subject is fixed in the first positional relationship, the radiation image capturing unit The first positional relationship is specified as a positional relationship between the position of the subject and the specific site, and the specific site is determined in advance when the imaging site of the subject is fixed in the first positional relationship. A second positional relationship different from the first positional relationship as a positional relationship between the position of the radiographic image capturing unit and the specific site when the site detecting unit detects that the site does not exist at the specified location. A positional relationship identification part to be identified;
A radiation imaging apparatus comprising: an output unit that outputs the positional relationship specified by the positional relationship specifying unit in association with the radiation image. The site detection unit is
When the imaging part of the subject is fixed in the first positional relationship with the radiographic imaging unit, the specific part is provided on a contact surface to be contacted, and detects whether or not the specific part is in contact. A contact sensor,
The positional relationship specifying unit captures the radiographic image when it detects that the contact sensor is in contact with the specific site when the imaging site of the subject is fixed in the first positional relationship. The first positional relationship is specified as the positional relationship between the position of the part and the specific site, and the contact sensor is the specified when the subject's imaging site is fixed in the first positional relationship. The second positional relationship different from the first positional relationship is specified as a positional relationship between the position of the radiographic image capturing unit and the specific site when it is detected that the site is not in contact. The radiation imaging apparatus described in 1. When imaging the subject in the PA direction, further comprising a chin rest for placing the subject's chin to fix the subject's posture,
The contact sensor is provided on a placement surface on which the subject on the jaw table places the jaw, and detects whether or not the subject is in contact with the jaw of the subject,
The positional relationship specifying unit, when detecting that the contact sensor is in contact with the subject's jaw when the imaging region of the subject is fixed in the first positional relationship, When the PA direction is specified as the positional relationship between the position of the image capturing unit and the specific site, and the imaging site of the subject is fixed in the first positional relationship, the contact sensor is connected to the subject. The radiation imaging apparatus according to claim 13, wherein the AP direction is specified as a positional relationship between the position of the radiation image capturing unit and the specific part when it is detected that the chin is not in contact with the jaw. When an imaging part of a subject to be imaged as a radiographic image is fixed in a predetermined first positional relationship with a radiographic image capturing unit that detects radiation transmitted through the subject and captures the radiographic image A site detection step for detecting whether or not the specific site is present at a predetermined position where the specific site that is a specific site of the subject is to be located;
When the imaging part of the subject is fixed in the first positional relationship, the radiographic imaging is performed when it is detected in the part detection stage that the specific part exists at the predetermined position. The first positional relationship is specified as the positional relationship between the position of the part and the specific site, and when the imaging site of the subject is fixed in the first positional relationship, the specific site is A second position different from the first positional relation as a positional relation between the position of the radiographic image capturing unit and the specific part when it is detected in the part detection stage that it does not exist at a predetermined position A positional relationship identification stage for identifying the relationship;
A radiation imaging method comprising: an output step of outputting the positional relationship specified in the positional relationship specifying step in association with the radiation image. A program for a radiation imaging apparatus, wherein the radiation imaging apparatus is
A radiation image capturing unit that detects radiation transmitted through the subject and captures a radiation image of the subject;
A specific part that is a predetermined specific part of the subject when the imaging part of the subject imaged as the radiographic image is fixed in a predetermined first positional relationship with the radiographic image capturing unit. A site detection unit for detecting whether or not the specific site exists at a predetermined position where
When the site detection unit detects that the specific site exists at the predetermined position when the imaging site of the subject is fixed in the first positional relationship, the radiation image imaging unit The first positional relationship is specified as a positional relationship between the position of the subject and the specific site, and the specific site is determined in advance when the imaging site of the subject is fixed in the first positional relationship. A second positional relationship different from the first positional relationship as a positional relationship between the position of the radiographic image capturing unit and the specific site when the site detecting unit detects that the site does not exist at the specified location. Positional relationship identification part to be identified,
A program that functions as an output unit that outputs the positional relationship specified by the positional relationship specifying unit in association with the radiation image.

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