JP2007130305A - Image diagnostic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve diagnostic efficiency by making it easy to obtain information about diagnostic section precisely. <P>SOLUTION: Based on radiation detection data obtained by detecting a radiation by a body cavity probe part 11 inserted to the esophagus of the subject SU, radiation images IR0, IR1 and IR2 showing intensity of the radiation are generated. Then, based on a magnetic resonance signal obtained by scanning about a photographic area including the esophagus, the slice images IA0, IA1 and IA2 of a slice surface including the esophagus are generated. Then, the generated radiation images IR0, IR1 and IR2 and the slice images IA0, IA1 and IA2 are synthesized to generate synthetic images IC0, IC1 and IC2. In this case, the generated radiation images IR0, IR1 and IR2 and the slice images IA0, IA1 and IA2 are positioned and synthesized so as to correspond to the position where the radiation is detected by the body cavity probe part 11 in the subject SU. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an image diagnostic apparatus, and in particular, based on radiation detection data obtained by a body cavity probe unit inserted into a body cavity of a subject detecting radiation in the body cavity of the subject, A slice image of a slice plane including a body cavity in the subject is generated based on raw data obtained by scanning the imaging region including the body cavity in the subject while generating a radiation image indicating the intensity of the detected radiation. The present invention relates to an image diagnostic apparatus that generates

  BACKGROUND ART Image diagnostic apparatuses such as a magnetic resonance imaging (MRI) apparatus and an RI (radio isotope) probe apparatus are used in various fields such as a medical field as an apparatus for obtaining information inside a subject. Yes.

  In order to obtain more efficient and high diagnostic ability, these diagnostic imaging apparatuses may be used in combination so as to make use of their characteristics (for example, Patent Document 1, Patent Document 2, Patent Document) 3).

JP 2002-165775 A JP 2003-98259 A JP 2004-24582 A

  For example, diagnostic imaging is performed using both an MRI apparatus that performs imaging of a slice surface of a subject and an RI probe apparatus that performs imaging by inserting a body cavity probe unit that detects radiation into a body cavity in the subject. May do.

  For example, first, in the RI probe apparatus, imaging is performed by inserting a body cavity probe portion into a body cavity in a subject.

  Here, after injecting a radioisotope into a subject, a body cavity probe part is inserted into a body cavity such as the esophagus of the subject, and for example, radiation generated from the radioisotope collected in cancer cells in the subject is injected into the body cavity The probe unit detects and acquires radiation detection data. Then, imaging is performed based on the radiation detection data and image diagnosis is performed. Here, for example, the position of the cancer cell in the subject is detected.

  Next, imaging is performed using an MRI apparatus.

  Here, based on the image diagnosis result of the RI probe apparatus, the position is aligned with the imaging region of the subject to be imaged by the MRI apparatus. For example, an MR marker detected by an MRI apparatus is provided on the subject, and alignment is performed using the MR marker as a feature point. Thereafter, the MRI apparatus receives MR signals from the imaging region of the subject, and performs image diagnosis based on the MR signals.

  However, in this case, it is difficult to accurately grasp information on the diagnosis site because the images imaged by the MRI apparatus and the images imaged by the RI probe apparatus are displayed separately to perform image diagnosis. In some cases, the diagnostic efficiency may be reduced.

  Therefore, an object of the present invention is to provide an image diagnostic apparatus capable of improving diagnostic efficiency.

  In order to achieve the above object, the diagnostic imaging apparatus of the present invention is based on radiation detection data obtained by detecting a radiation in a body cavity of the subject by a body cavity probe unit inserted into the body cavity of the subject. A radiographic image generation unit that generates a radiographic image indicating the intensity of the radiation detected by the body cavity probe unit in the body cavity of the specimen, and raw data obtained by scanning the imaging region including the body cavity in the subject And a slice image generation unit that generates a slice image of a slice plane including the body cavity in the subject, the radiological image generated by the radiological image generation unit, and the slice A synthesized image is generated by synthesizing the slice image generated by the image generator. An image synthesizing unit, wherein the image synthesizing unit corresponds to a position in the subject corresponding to a position where the body cavity probe unit detects the radiation and the radiological image generation unit generates the radiographic image. The synthesized image is generated by aligning and synthesizing the image with the slice image.

  According to the present invention, it is possible to provide an image diagnostic apparatus capable of improving imaging efficiency.

  Hereinafter, an example of an embodiment according to the present invention will be described with reference to the drawings.

<Embodiment 1>
FIG. 1 is a diagram showing an image diagnostic apparatus 1 in an embodiment according to the present invention.

  As shown in FIG. 1, the diagnostic imaging apparatus 1 according to the present embodiment includes an RI probe apparatus 10 and a magnetic resonance imaging apparatus 200.

(RI probe device)
The RI probe apparatus 10 will be described.

  FIG. 2 is a configuration diagram showing the configuration of the RI probe apparatus 10 in the present embodiment.

  As shown in FIG. 2, the RI probe apparatus 10 of the present embodiment includes a body cavity probe unit 11, a rotational movement unit 21, an instrumentation unit 31, a control unit 41, a display unit 51, an operation unit 61, And a dummy probe portion 71. Each part will be described sequentially.

  As shown in FIG. 2, the body cavity probe unit 11 includes a detection unit 111 and an insertion unit 112, and is inserted into a body cavity into a subject into which a radioisotope has been injected, and radiation is generated in the body cavity inside the subject. Is detected. For example, the body cavity probe unit 11 is inserted into the esophagus as a body cavity of the subject.

  As shown in FIG. 2, the detection unit 111 of the body cavity probe unit 11 is provided so as to be positioned on the distal end side inserted into the subject in the insertion unit 112.

  FIG. 3 is a cross-sectional view of the detection unit 111 of the body cavity probe unit 11 in the present embodiment.

  As shown in FIG. 3, the detection unit 111 supports the first scintillator 111a that emits light by receiving gamma rays and beta rays inside the subject, and transmits the first scintillator 111a. And a second scintillator 111b that receives and emits gamma rays. The first scintillator 111a and the second scintillator 111b are made of, for example, cesium iodide. The first scintillator 111a is formed in a cylindrical shape, and is arranged so as to cover the periphery of the columnar second scintillator 111b.

  On the other hand, the insertion part 112 of the body cavity probe part 11 is a soft, flexible and light-shielding tubular body, and is inserted into the body cavity of the subject. An optical fiber (not shown) passes through the insertion portion 112. This optical fiber is connected to each of the first scintillator 111a and the second scintillator 111b of the detection unit 111, and the light from each of the first scintillator 111a and the second scintillator 111b is sent to the instrumentation unit 31. To transmit.

  The rotational movement unit 21 includes a plurality of motors (not shown), and the motor rotates the detection unit 111 of the body cavity probe unit 11 at a constant speed around the insertion direction in the body cavity of the subject, and along the insertion direction. To move at a constant speed.

  The instrumentation unit 31 includes a photoelectric conversion device (not shown), and the photoelectric conversion device receives light generated in each of the first scintillator 111a and the second scintillator 111b via the optical fiber of the insertion unit 112. Convert it into an electrical signal. The instrumentation unit 31 includes a counter circuit, and the counter circuit outputs a count value indicating the intensity of the detected radiation based on the electric signal converted by the photoelectric conversion device. Specifically, the signal obtained from the first scintillator 111a that emits light by gamma rays and beta rays and the signal obtained from the second scintillator 111b that emits light by gamma rays are subtracted, and the difference value is calculated for the beta rays. Obtained as a count value. The instrumentation unit 31 receives the positional information of the detection unit 111 of the body cavity probe unit 11 moved by the rotational movement unit 21, and outputs the positional information to the control unit 41 in association with the count value data obtained as described above. .

  The control unit 41 controls each unit based on an operation command input to the operation unit 61 by the operator. In addition, the control unit 41 receives the data of the radiation count value from the instrumentation unit 31 and generates a profile image indicating the relationship between the radiation count value and the position of the detection unit 111.

  The display unit 51 includes, for example, a CRT, and displays an image on the display surface based on a command from the control unit 41. In the present embodiment, the display device 51 displays, for example, a profile image generated by the control unit 41.

  The operation unit 61 includes, for example, a keyboard and a pointing device, and inputs an instruction such as an operation command to the control unit 41 based on an input operation by the operator.

  The dummy probe unit 71 accommodates the body cavity probe unit 11 therein. The dummy probe portion 71 is inserted into the subject by the operator while the body cavity probe portion 11 is accommodated. Further, the dummy probe unit 71 is provided with an MR marker that generates a magnetic resonance signal inside the inserted subject.

  FIG. 4 is a side view showing the dummy probe portion 71 in the present embodiment.

  As shown in FIG. 4, the dummy probe portion 71 includes a probe housing portion 171 and an MR marker housing portion 172.

  As shown in FIG. 4, the probe accommodating portion 171 is a cylindrical tubular body, and is formed using, for example, soft PVC (Polyvinyl Chloride, polyvinyl chloride) so as not to generate a magnetic resonance signal. Soft and flexible. When the probe storage unit 171 detects radiation at the probe unit and performs imaging inside the subject, the probe storage unit 171 stores the body cavity probe unit 11 in the internal space of the tubular body, It is inserted into the subject by the operator in the accommodated state. Thereafter, when imaging is performed by the MRI apparatus, the body cavity probe unit 11 accommodated in the internal space of the tubular body is taken out from the probe accommodating unit 171 while being inserted into the subject.

  As shown in FIG. 4, the MR marker accommodating portion 172 is fitted and fixed to one end portion of the probe accommodating portion 171 so as to be positioned at the distal end side to be inserted into the subject in the dummy probe portion 71. The MR marker storage portion 172 is formed using, for example, an acrylic resin that is a non-magnetic material so that the tip side to be inserted into the subject has a spherical shape, and the storage space for storing the MR marker is concave. It is formed into a shape. The MR marker accommodating portion 172 accommodates MR markers containing protons in this accommodating space. For example, the MR marker storage unit 172 stores water as an MR marker. Note that the opening portion of the MR marker accommodating portion 172 is covered with an adhesive tape or the like, and the MR marker accommodated in the MR marker accommodating portion 172 is sealed in the accommodating space.

(Magnetic resonance imaging system)
The magnetic resonance imaging apparatus 200 will be described.

  FIG. 5 is a configuration diagram showing the configuration of the magnetic resonance imaging apparatus 200.

  As shown in FIG. 5, the magnetic resonance imaging apparatus 200 includes a scan unit 202 and an operation console unit 203.

  The scanning unit 202 will be described.

  As shown in FIG. 5, the scanning unit 202 includes a static magnetic field magnet unit 212, a gradient coil unit 213, an RF coil unit 214, an RF drive unit 222, a gradient drive unit 223, a data collection unit 224, and a cradle. 226, and performs a scan to obtain a magnetic resonance signal from the imaging region of the subject SU in the imaging space B in which the static magnetic field is formed.

  Here, as shown in FIG. 5, the scanning unit 202 scans the subject SU in which the dummy probe portion 71 of the RI probe apparatus 10 described above is inserted into the esophagus of the subject SU in the imaging space B in which the static magnetic field is formed. Contain. Then, the scan unit 202 performs a scan in the imaging space B to obtain magnetic resonance signals from the imaging region of the subject SU in which the dummy probe unit 71 is inserted as raw data. Here, the scan unit 202 scans the imaging region of the subject SU corresponding to the position of the dummy probe unit 71 detected by the probe position detection unit 235 of the operation console unit 203 described later. For example, the scanning unit 202 has a position corresponding to the dummy probe unit 71 as a center, and a tomographic plane corresponding to a plane whose vertical direction is the direction in which the dummy probe unit 71 moves is used as an imaging region, and a sliding window ( A scan is performed with a high-speed image sequence using a sliding window.

  In addition, the scan unit 202 performs magnetic resonance from the MR marker stored in the MR marker storage unit 172 of the dummy probe unit 71 before performing the scan for obtaining the magnetic resonance signal from the imaging region of the subject SU. Perform a scan to get a signal. For example, the scanning unit 202 scans a tomographic plane along the moving direction in which the dummy probe unit 71 moves in the subject SU.

  Each component of the scan unit 202 will be described sequentially.

  The static magnetic field magnet unit 212 includes, for example, a pair of permanent magnets provided so as to sandwich the imaging space B in which the subject SU is accommodated, and the pair of permanent magnets forms a static magnetic field in the imaging space B. Here, the static magnetic field magnet unit 212 forms a static magnetic field such that the direction of the static magnetic field is along the direction Z perpendicular to the body axis direction of the subject SU. Note that the static magnetic field magnet unit 212 may be formed of a superconducting magnet.

  The gradient coil unit 213 forms a gradient magnetic field in the imaging space B in which a static magnetic field is formed, and adds position information to the magnetic resonance signal received by the RF coil unit 214. Here, the gradient coil unit 213 includes three systems, and forms a gradient magnetic field in each of the frequency encoding direction, the phase encoding direction, and the slice selection direction according to the imaging conditions. Specifically, the gradient coil unit 213 applies a gradient magnetic field in the slice selection direction of the subject SU, and selects a slice of the subject SU to be excited by the RF coil unit 214 transmitting an RF pulse. The gradient coil 13 applies a gradient magnetic field in the phase encoding direction of the subject SU, and phase encodes the magnetic resonance signal from the slice excited by the RF pulse. The gradient coil unit 213 applies a gradient magnetic field in the frequency encoding direction of the subject SU, and frequency encodes the magnetic resonance signal from the slice excited by the RF pulse.

  As shown in FIG. 5, the RF coil unit 214 is disposed so as to surround the imaging region of the subject SU. In the imaging space B where a static magnetic field is formed by the static magnetic field magnet unit 212, the RF coil unit 214 transmits an RF pulse, which is an electromagnetic wave, to the subject SU to form a high-frequency magnetic field, and in the imaging region of the subject SU. Excites proton spin. The RF coil unit 214 receives electromagnetic waves generated from the excited protons in the subject SU as magnetic resonance signals.

  The RF drive unit 222 drives the RF coil unit 214 based on a control signal from the control unit 230 and transmits an RF pulse in the imaging space B to form a high-frequency magnetic field. The RF drive unit 222 modulates the signal from the RF oscillator to a signal having a predetermined timing and a predetermined envelope using a gate modulator, and then amplifies the signal modulated by the gate modulator by an RF power amplifier. Output to the RF coil unit 214 to transmit an RF pulse.

  Based on the control signal from the control unit 230, the gradient driving unit 223 applies a gradient pulse to the gradient coil unit 213 and drives it to generate a gradient magnetic field in the imaging space B in which a static magnetic field is formed. The gradient driving unit 223 includes three systems of driving circuits (not shown) corresponding to the three systems of gradient coil units 213.

  The data collection unit 224 collects the magnetic resonance signals received by the RF coil unit 214 based on the control signal from the control unit 230 and outputs the collected magnetic resonance signals to the image generation unit 231. The data collection unit 224 collects the magnetic resonance signals subjected to phase encoding and frequency encoding so as to correspond to the k space. Here, in the data collection unit 224, the phase detector detects the magnetic resonance signal received by the RF coil unit 214 using the output of the RF oscillator of the RF drive unit 222 as a reference signal. Thereafter, the magnetic resonance signal, which is an analog signal, is converted into a digital signal using an A / D converter. Then, the data collection unit 224 stores this magnetic resonance signal in the memory and then outputs it to the image generation unit 231.

  The cradle 226 has a table on which the subject SU is placed. The cradle 226 moves between the inside and the outside of the imaging space B based on a control signal from the control unit 230.

  The operation console unit 203 will be described.

  As illustrated in FIG. 5, the operation console unit 203 includes a control unit 230, an image generation unit 231, an operation unit 232, a display unit 233, a storage unit 234, and a probe position detection unit 235.

  Each component of the operation console unit 203 will be described sequentially.

  The control unit 230 includes a computer and a program that causes each unit to execute an operation corresponding to a predetermined scan using the computer, and operation data from the operation unit 232 is input. Then, based on the operation data input from the operation unit 232, the control unit 230 outputs a control signal that causes the RF drive unit 222, the gradient drive unit 223, and the data collection unit 224 to execute a predetermined scan. Take control. Based on the operation data input from the operation unit 232, the control unit 230 outputs a control signal to the image generation unit 231, the display unit 233, and the storage unit 234 to perform control.

  In the present embodiment, the control unit 230 causes the scan unit 202 to perform a scan that obtains, as raw data, a magnetic resonance signal from the imaging region of the subject SU in which the dummy probe unit 71 is inserted. Here, the control unit 230 causes the imaging region of the subject SU corresponding to the position of the dummy probe unit 71 detected by the probe position detection unit 235 to be scanned. Further, the control unit 230 obtains a magnetic resonance signal from the MR marker accommodated in the MR marker accommodation unit 172 of the dummy probe unit 71 before performing the scan for obtaining the magnetic resonance signal from the imaging region of the subject SU. The scanning unit 202 performs scanning.

  The image generation unit 231 includes a computer and a program that executes predetermined data processing using the computer, and generates an image based on a control signal from the control unit 230. Details of the image generation unit 231 will be described later.

  The operation unit 232 includes an operation device such as a keyboard and a pointing device. The operation unit 232 receives operation data from the operator and outputs the operation data to the control unit 230.

  The display unit 233 is configured by a display device such as a CRT, and displays an image on a display screen based on a control signal from the control unit 230. For example, the display unit 233 displays an image of input items for which operation data is input to the operation unit 232 by the operator on the display screen. Specifically, the display unit 233 displays a dialog box for inputting scan timing parameters such as the number of echoes, echo time, repetition time, and bandwidth, a button for inputting a scan start instruction, and the like. In addition, the display unit 233 displays the image generated by the image generation unit 231 on the display screen. In the present embodiment, the display unit 233 receives data about the image generated by the image generation unit 231 and sequentially displays the images so as to be real time with respect to the execution of the scan. For example, a composite image generated by an image composition unit 2313 of the image generation unit 231 described later is displayed on the display screen.

  The storage unit 234 includes a memory and stores various data. In the storage device 33, the stored data is accessed by the control unit 230 as necessary.

  The probe position detection unit 235 includes a computer and a program that executes predetermined data processing using the computer, and detects a position where the dummy probe unit 71 has moved in the subject SU. In the present embodiment, the probe position detection unit 235 obtains the position of the MR marker based on the magnetic resonance signal from the MR marker obtained by scanning the MR marker provided in the dummy probe unit 71, and The position where the probe unit 71 has moved is detected.

  Details of the image generation unit 231 will be described.

  FIG. 6 is a block diagram showing the image generation unit 231 in the present embodiment.

  As illustrated in FIG. 6, in the present embodiment, the image generation unit 231 includes a radiation image generation unit 2311, a slice image generation unit 2312, and an image composition unit 2313.

  The radiological image generation unit 2311 is based on the radiation detection data obtained by detecting the radiation in the body cavity of the subject SU by the body cavity probe unit 11 inserted in the body cavity of the subject SU in the RI probe device 10 described above. Thus, a radiation image indicating the intensity of the radiation detected by the body cavity probe unit 11 in the body cavity of the subject SU is generated. That is, the radiological image generation unit 2311 receives the radiation detection data obtained when the body cavity probe unit 11 detects radiation from the RI probe device 10 and generates a radiographic image.

  Here, the radiological image generation unit 2311 corresponds to a detection range in which the body cavity probe unit 11 of the RI probe apparatus 10 detects radiation in the subject SU, and according to the intensity of radiation detected by the body cavity probe unit 11. This radiation image is generated so that the color densities are different. Specifically, the radiographic image generation unit 2311 generates a radiographic image so that the color density increases as the intensity of the radiation detected by the body cavity probe unit 11 increases.

  The slice image generation unit 2312 acquires the magnetic resonance signals collected by the data collection unit 224 as raw data, performs image reconstruction processing on the magnetic resonance signals that are the acquired raw data, and performs the image reconstruction of the subject SU. A slice image for the tomographic plane is generated. In the present embodiment, the slice image generation unit 2312 obtains raw data obtained by the scan unit 2 performing a scan on the imaging region including the body cavity in which the body cavity probe unit 11 is inserted as described above in the subject SU. Based on the above, a slice image of the slice surface including the body cavity is generated in the subject SU.

  Here, the slice image generation unit 2313 performs a slice image on the imaging region of the subject SU corresponding to the position of the dummy probe unit 71 detected by the probe position detection unit 235 with respect to the scan performed by the scan unit 2. Generate to be real time. Specifically, the slice image generation unit 2312 sequentially generates the slice images so as to correspond to a plane whose perpendicular is the insertion direction in which the dummy probe unit 71 is inserted into the body cavity of the subject SU. For example, when the dummy probe unit 71 is inserted into the esophagus as a body cavity of the subject SU, the slice image generation unit 2312 corresponds to the slice image so as to correspond to the axial plane having the insertion direction inserted into the esophagus as a perpendicular line. Is generated.

  The image composition unit 2313 generates a composite image by combining the radiographic image generated by the radiographic image generation unit 2311 and the slice image generated by the slice image generation unit 2312. Here, in the subject SU, the image synthesis unit 2313 detects the radiation so that the body cavity probe unit 11 of the above-described RI probe apparatus 10 detects the radiation, and the radiation image generation unit 2311 corresponds to the position where the radiation image is generated. A synthesized image is generated by aligning and synthesizing the radiation image with the slice image. Then, the image composition unit 2313 sequentially outputs the generated composite image to the display unit 233.

(Operation)
Hereinafter, the operation of the diagnostic imaging apparatus 1 according to the embodiment of the present invention will be described.

  FIG. 7 is a flowchart showing the operation of the diagnostic imaging apparatus 1 in the present embodiment.

  As shown in FIG. 7, first, radiation detection data for the subject SU is obtained (S1).

  Here, radiation detection data for the subject SU is obtained using the RI probe device 10.

  FIG. 8 is a flowchart showing an operation when obtaining radiation detection data using the RI probe apparatus 10 in the present embodiment.

  As shown in FIG. 8, when obtaining radiation detection data, first, the body cavity probe unit 11 is inserted into the subject SU (S11).

  Here, the operator inserts the body cavity probe unit 11 into the subject SU.

  FIG. 9 is a side view showing how the body cavity probe unit 11 is inserted into the subject SU in the present embodiment.

  In the present embodiment, after the operator houses the body cavity probe unit 11 in the dummy probe unit 71 and injects the radioisotope into the subject SU, the body cavity probe unit 11 is housed as shown in FIG. The dummy probe unit 71 is inserted into the esophagus of the subject SU, and the detection unit 111 of the body cavity probe unit 11 accommodated in the dummy probe unit 71 is moved to the start position X0.

  Next, as shown in FIG. 8, radiation is detected inside the subject SU to obtain radiation detection data (S21).

  Here, the body cavity probe unit 11 accommodated in the dummy probe unit 71 is caused to detect radiation inside the subject SU in which the dummy probe unit 71 is inserted. Then, a radiation count value C is obtained as radiation detection data based on the radiation detected by the body cavity probe unit 11.

  FIG. 10 is a side view showing a state in which radiation is detected inside the subject SU. FIG. 11 is a diagram illustrating the relationship between the radiation count value C and the position X of the detection unit 111.

  In the present embodiment, as shown in FIG. 10, the body cavity probe unit 11 inserted into the esophagus is pulled out from the dummy probe unit 71 by the rotational movement unit 21, and the position of the detector 111 of the body cavity probe unit 11 is changed from the start position X0. The detection unit 111 detects radiation at each position. For example, the detection unit 111 detects the radiation generated from the cancer cell at the position X1 of the cancer cell where the radioisotope is collected in the subject SU. Based on the radiation detected by the detection unit 111, the control unit 41 obtains the radiation count value C. Then, as shown in FIG. 11, the control unit 41 generates a profile image indicating the relationship between the count value C and the position X of the detection unit 111 and displays it on the display unit 51. In this profile image, as shown in FIG. 6, for example, the position X1 corresponding to the cancer cell in the subject SU has a high count value C.

  Next, as shown in FIG. 8, the body cavity probe unit 11 is removed from the dummy probe unit 71 (S31).

  Here, the operator pulls out the body cavity probe unit 11 accommodated in the dummy probe unit 71 and removes the body cavity probe unit 11 from the dummy probe unit 71.

  In this way, the operation of obtaining radiation detection data for the subject SU (S1) is completed.

  Next, as shown in FIG. 7, a magnetic resonance signal for the subject SU is obtained (S2).

  Here, a magnetic resonance signal for the subject SU is obtained using the magnetic resonance imaging apparatus 200.

  FIG. 12 is a flowchart showing an operation when obtaining a magnetic resonance signal for the subject SU using the magnetic resonance imaging apparatus 200 in the present embodiment.

  First, as shown in FIG. 12, the position of the dummy probe unit 71 is detected in the subject SU (S121).

  Here, the probe position detection unit 235 detects the position where the operator has inserted the dummy probe unit 71 in the esophagus of the subject SU. In the present embodiment, the scan unit 2 performs a scan for obtaining a magnetic resonance signal from the MR marker accommodated in the MR marker accommodating unit 172 of the dummy probe unit 71, and the magnetic resonance from the MR marker obtained by the scan is performed. Based on the signal, the probe position detection unit 235 obtains the position of the MR marker and detects the position of the dummy probe unit 71.

  FIG. 13 is a side view showing a state where a magnetic resonance signal generated from the MR marker accommodated in the MR marker accommodating portion 172 of the dummy probe portion 71 is received using the MRI apparatus. 13A is a side view showing a state when reception of a magnetic resonance signal generated from the MR marker is started, and FIG. 13B is a state when the reception is finished. FIG.

  In the present embodiment, as shown in FIG. 13, in the subject SU, a sagittal surface, which is a tomographic plane along the moving direction x in which the dummy probe unit 71 moves and includes the dummy probe unit 71, is scanned. Are scanned, and the slice image generation unit 2312 of the image generation unit 231 generates a slice image of the sagittal plane. Then, by performing feature extraction processing or the like on the slice image generated by the slice image generation unit 2312, the probe position detection unit 235 calculates the position corresponding to the MR marker in the slice image, and the calculation result To determine the position where the dummy probe unit 71 has moved. Here, as shown in FIG. 13A, in the subject SU, a scan for receiving a magnetic resonance signal is started at the start position X0 where the dummy probe unit 71 is inserted. And as shown in FIG.13 (b), the dummy probe part 71 inserted in the esophagus is pulled out from the start position X0 to the end position X2 via the position X1 corresponding to a cancer cell, MR of the dummy probe part 71 The marker position is changed sequentially.

  Next, as shown in FIG. 12, a scan for obtaining a magnetic resonance signal from the imaging region of the subject SU is performed (S131).

  Here, the scan unit 202 scans the imaging region of the subject SU corresponding to the position of the dummy probe unit 71 detected by the probe position detection unit 235 to obtain a magnetic resonance signal.

  In the present embodiment, as shown in FIG. 13B described above, the magnetic resonance signal for the imaging region corresponding to each position where the MR marker has moved is received from the start position X0 to the end position X2. The scanning unit 202 performs scanning. Specifically, as shown in FIG. 13B, a tomographic plane whose center is at the position corresponding to the dummy probe unit 71 and whose perpendicular is the moving direction x in which the dummy probe unit 71 moves is used as an imaging region. The scanning unit 2 performs scanning. That is, in the present embodiment, scans are sequentially performed in which the tomographic plane, which is an axial plane with the insertion direction in which the dummy probe unit 71 is inserted into the esophagus as a perpendicular line, is an imaging region. For example, this scan is performed by a spin echo method.

  Next, as shown in FIG. 7, after generating a radiographic image and a slice image, the radiographic image and the slice image are combined to generate a combined image (S3).

  Here, the radiation image generation unit 2311 generates a radiation image indicating the intensity of radiation detected by the body cavity probe unit 11 in the esophagus of the subject SU. In the present embodiment, the body cavity probe unit 11 inserted into the esophagus of the subject SU in the RI probe apparatus 10 described above is based on radiation detection data obtained by detecting radiation in the esophagus of the subject SU. The radiation image generating unit 2311 generates the radiation image.

  Then, the slice image generation unit 2312 generates a slice image for the tomographic plane of the subject SU. In this embodiment, the slice image generation unit 2312 acquires the magnetic resonance signals collected by the data collection unit 224 as raw data, and performs image reconstruction processing on the magnetic resonance signals that are the obtained raw data. Thus, a slice image of the tomographic plane of the subject SU is generated.

  Thereafter, the radiographic image generated by the radiographic image generation unit 2311 and the slice image generated by the slice image generation unit 2312 are combined by the image combining unit 2313 to generate a composite image as a fusion image. .

  FIG. 14 is a side view showing a region where a composite image is generated in the subject SU in the present embodiment. FIG. 15 is a diagram showing a composite image synthesized by the image composition unit 2313 in the present embodiment. 15A is a composite image generated for the slice plane corresponding to the position x2 on the side where the movement of the dummy probe unit 71 is finished in FIG. FIG. 15B is an intermediate position between the position where the movement of the dummy probe unit 71 is started and the position where it is ended in FIG. 14, and cancer cells in which radioisotopes are collected in the subject SU. Is a composite image generated for the slice plane corresponding to the position x1. FIG. 15C is a composite image generated for the slice plane corresponding to the position x0 on the side where the movement of the dummy probe 71 starts in FIG.

  In this embodiment, as shown in FIG. 14 and FIG. 15, magnetic resonance obtained by the scan unit 202 performing a scan on the imaging region including the esophagus in which the dummy probe unit 71 is inserted in the subject SU. Based on the signal, the slice image generation unit 2312 sequentially generates slice images for the axial planes PA0, PA1, and PA2 including the esophagus in the subject SU. Here, the slice image generation unit 2313 performs a slice image on the imaging region of the subject SU corresponding to the position of the dummy probe unit 71 detected by the probe position detection unit 235 with respect to the scan performed by the scan unit 2. Generate to be real time.

  For example, as shown in FIG. 14, for the axial plane PA0 corresponding to the position x0 on the side where the movement of the dummy probe section 71 is started, a slice image IA0 is generated as shown in FIG. Further, as shown in FIG. 14, the axial plane PA1 corresponding to the position x1 that is an intermediate position between the position where the movement of the dummy probe portion 71 is started and the position where it is ended is shown in FIG. As shown, a slice image IA1 is generated. Further, as shown in FIG. 14, a slice image IA2 is generated for the axial plane PA2 corresponding to the position x2 on the side where the movement of the dummy probe portion 71 is ended, as shown in FIG.

  As shown in FIGS. 14 and 15, the body cavity probe unit 11 corresponds to a detection range in which radiation is detected in the subject SU, and the color density according to the intensity of the radiation detected by the body cavity probe unit 11. The radiological image generation unit 2311 generates this radiographic image so that they are different.

  Specifically, the radiographic image generation unit 2311 generates a radiographic image so that the color density increases as the intensity of the radiation detected by the body cavity probe unit 11 increases. Here, the slice image generation unit 2312 generates a radiation image so as to correspond to the axial planes PA0, PA1, and PA2 that are slice planes for generating slice images.

  For example, as shown in FIG. 14, for the axial plane PA0 corresponding to the position x0 on the side where the movement of the dummy probe unit 71 is started, a radiation image IR0 is generated as shown in FIG. Further, as shown in FIG. 14, the axial plane PA1 corresponding to the position x1 that is an intermediate position between the position where the movement of the dummy probe portion 71 is started and the position where it is ended is shown in FIG. As shown, a radiation image IR1 is generated. Further, as shown in FIG. 14, as shown in FIG. 15A, the radiation image IR <b> 2 is generated for the axial plane PA <b> 2 corresponding to the position x <b> 2 on the side where the movement of the dummy probe unit 71 is finished.

  Here, in FIG. 14, the intermediate position between the position where the movement of the dummy probe 71 is started and the position where it is ended corresponds to the position x1 of the cancer cell where the radioisotope is collected in the subject SU. The intensity of the radiation detected by the body cavity probe unit 11 is higher than the position x0 on the side where the movement of the dummy probe unit 71 is started and the position x2 on the side where the movement of the dummy probe unit 71 is finished. For this reason, as shown in FIG. 15B, for the radiographic image IR1 corresponding to the position x1 of the cancer cell where the radioisotopes have gathered in the subject SU, the position on the side where the movement of the dummy probe unit 71 is started. It is generated so that the color density is deeper than the radiation image IR0 of x0 and the radiation image IR2 of the position x2 on the side where the movement of the dummy probe unit 71 is finished.

  Then, as shown in FIGS. 14 and 15, the radiation images IR0, IR1, IR2 generated by the radiation image generation unit 2311, and the slice images IA0, IA1, IA2 generated by the slice image generation unit 2312, Are combined by the image combining unit 2313 to generate combined images IC0, IC1, and IC2. Here, in the subject SU, the body cavity probe unit 11 of the RI probe device 10 described above detects radiation, and the radiographic image generation unit 2311 corresponds to the position where the radiographic images IR0, IR1, and IR2 are generated. The synthesizing unit 2313 aligns and synthesizes the radiation images IR0, IR1, and IR2 with the slice images IA0, IA1, and IA2, and sequentially generates the synthesized images IC0, IC1, and IC2. Specifically, the radiation images IR0, IR1, and IR2 are superimposed on the slice images IA0, IA1, and IA2, respectively, and the composite images IC0, IC1, and IC2 are generated.

  Next, as shown in FIG. 7, a composite image is displayed (S4).

  Here, as shown in FIG. 15, the display unit 233 sequentially receives the data about each composite image IC0, IC1, and IC2 generated by the image composition unit 2313, and receives the respective composite images IC0, IC1, and IC2. The images are sequentially displayed on the display screen so as to be real time with respect to the execution of the scan.

  As described above, in the present embodiment, the body cavity probe unit 11 inserted into the esophagus that is the body cavity of the subject SU is based on the radiation detection data obtained by detecting the radiation in the esophagus of the subject SU. The radiation image generation unit 2311 generates radiation images IR0, IR1, and IR2 indicating the intensity of the radiation. Then, the magnetic resonance signal obtained by the scan unit 202 scanning the imaging region including the esophagus in the subject SU is used as raw data, and the slice images IA0, IA1, and the slice planes including the esophagus in the subject SU. The slice image generation unit 2312 generates IA2. The slice image generation unit 2312 generates the slice images IA0, IA1, and IA2 so as to be real time with respect to the scan performed by the scan unit 2. Here, the slice image generation unit 2312 generates the slice images IA0, IA1, and IA2 so as to correspond to the axial plane with the insertion direction of the body cavity probe unit 11 inserted into the esophagus of the subject SU as a perpendicular line. Then, by synthesizing the generated radiation images IR0, IR1, IR2 and the slice images IA0, IA1, IA2, the image composition unit 2313 generates composite images IC0, IC1, IC2. The image composition unit 2313 generates composite images IC0, IC1, and IC2 so as to be real time with respect to the scan performed by the scan unit 2. Here, in the subject SU, the image composition unit 2313 corresponds to a position where the body cavity probe unit 11 detects radiation and the radiation image generation unit 2311 corresponds to a position where the radiation images IR0, IR1, and IR2 are generated. The synthesized images IC0, IC1, and IC2 are generated by aligning and synthesizing the IR0, IR1, and IR2 with the slice images IA0, IA1, and IA2.

  Therefore, in the present embodiment, composite images IC0, IC1, and IC2 of the radiation images IR0, IR1, and IR2 and slice images IA0, IA1, and IA2 are generated, and image diagnosis is performed using the composite images IC0, IC1, and IC2. Therefore, it is easy to accurately grasp information related to the diagnosis part, and the diagnosis efficiency can be improved.

  In the present embodiment, the radiation corresponding to the detection range in which the body cavity probe unit 11 detects radiation in the subject SU and the color density varies depending on the intensity of the radiation detected by the body cavity probe unit 11. The image generation unit 2311 generates radiation images IR0, IR1, and IR2. Specifically, the radiographic image generation unit 2311 increases the radiographic images IR0, IR1, and IR2 so that the color density increases as the count value C, which is the intensity of the radiation detected by the body cavity probe unit 11, increases. Is generated.

  For this reason, this embodiment makes it easy to accurately grasp information related to a diagnostic region with high radiation intensity when performing image diagnosis using the composite images IC0, IC1, and IC2, and improves diagnostic efficiency. be able to.

<Embodiment 2>
Hereinafter, Embodiment 2 according to the present invention will be described.

  The present embodiment differs from the first embodiment in the operation of the magnetic resonance imaging apparatus 200 in the diagnostic imaging apparatus 1. For this reason, description is omitted about the overlapping part.

  The operation of the diagnostic imaging apparatus 1 according to this embodiment will be described.

  In the present embodiment, as in the first embodiment, as shown in FIG. 7, first, radiation detection data for the subject SU is obtained (S1). Thereafter, as shown in FIG. 7, a magnetic resonance signal for the subject SU is obtained (S2).

  Then, as shown in FIG. 7, after generating a radiographic image and a slice image, the radiographic image and the slice image are synthesized to generate a synthesized image (S3).

  FIG. 16 is a diagram illustrating a region where a composite image is generated on the axial surface of the subject SU in the present embodiment. FIG. 17 is a diagram showing a composite image synthesized by the image composition unit 2313 in the present embodiment. 17A is a surface corresponding to the center of the dummy probe portion 71 inserted into the esophagus of the subject SU on the axial surface of the subject SU shown in FIG. FIG. 7 is a composite image generated for the sagittal plane PS0 along the insertion direction in which the unit 71 is inserted into the esophagus of the subject SU. FIG. 17B is a surface corresponding to a position different from the center of the dummy probe portion 71 inserted in the esophagus of the subject SU on the axial surface of the subject SU shown in FIG. It is a composite image generated for the sagittal plane PS1 along the insertion direction in which the dummy probe unit 71 is inserted into the esophagus of the subject SU.

  In the present embodiment, as shown in FIGS. 16 and 17, magnetic resonance obtained by the scan unit 202 performing a scan on an imaging region including the esophagus in which the dummy probe unit 71 is inserted in the subject SU. Based on the signal, the slice image generation unit 2312 generates slice images for the sagittal planes PS0 and PS1 including the esophagus in the subject SU.

  Here, the slice image generation unit 2313 performs a slice image on the imaging region of the subject SU corresponding to the position of the dummy probe unit 71 detected by the probe position detection unit 235 with respect to the scan performed by the scan unit 2. Generate to be real time. For example, as shown in FIG. 16 and FIG. 17 (a), on the axial surface of the subject SU, the surface corresponds to the center position y0 of the dummy probe portion 71 inserted into the esophagus of the subject SU, A slice image IS0 is generated for the sagittal plane PS0 along the insertion direction in which the dummy probe unit 71 is inserted into the esophagus of the subject SU. Further, as shown in FIGS. 16 and 17B, the axial surface of the subject SU corresponds to a position y1 different from the center of the dummy probe portion 71 inserted in the esophagus of the subject SU. Thus, a slice image IS1 is generated for the sagittal plane PS1 along the insertion direction in which the dummy probe unit 71 is inserted into the esophagus of the subject SU.

  Then, as shown in FIGS. 16 and 17, the radiographic image generation unit 2311 generates a radiographic image so that the slice image generation unit 2312 corresponds to the sagittal planes PS0 and PS1 that are slice planes for generating the slice image. . Here, as in the first embodiment, as shown in FIG. 17, the intermediate position x1 between the position x0 where the movement of the dummy probe unit 71 is started and the position x2 where the movement is ended is a radiation in the subject SU. Compared with the position x0 on the side where the movement of the dummy probe portion 71 is started and the position x2 on the side where the movement of the dummy probe portion 71 is finished in order to correspond to the position of the cancer cell where the isotopes are gathered. The intensity of the radiation detected by the probe unit 11 is large. For this reason, as shown in FIGS. 17A and 17B, the position x1 of the cancer cell in which the radioisotope is collected in the subject SU is the position on the side where the movement of the dummy probe unit 71 is started. The radiation images IR0 and IR1 are generated so that the color density is higher than x0 and the position x2 on the side where the movement of the dummy probe unit 71 is finished.

  Thereafter, as shown in FIGS. 16 and 17, in the same manner as in the first embodiment, the radiographic images IR0 and IR1 generated by the radiographic image generation unit 2311 and the slice images generated by the slice image generation unit 2312 are used. The combined images IC0 and IC1 are generated by the image combining unit 2313 combining each of IS0 and IS1.

  Next, as shown in FIG. 7, a composite image is displayed (S4).

  Here, the display unit 233 receives the data about each of the combined images IC0 and IC1 generated by the image combining unit 2313 and displays the data on the display screen.

  FIG. 18 is a diagram showing a composite image IC0 displayed by the display unit 233 in the present embodiment. In FIG. 18, FIG. 18A shows a composite image IC0 displayed when the movement of the dummy probe unit 71 is started. On the other hand, FIG. 18B shows a composite image IC0 displayed when the movement of the dummy probe unit 71 is completed.

  As shown in FIG. 18, in this embodiment, the composite image IC0 is sequentially displayed so as to be real time with respect to the execution of the scan.

  As described above, in the present embodiment, similarly to the first embodiment, the combined images IC0 and IC1 of the radiation images IR0 and IR1 and the slice images IS0 and IS1 are generated, and the combined images IC0 and IC1 are used to generate an image. Can be diagnosed.

  For this reason, it is easy to accurately grasp information relating to the diagnostic region, and diagnostic efficiency can be improved.

<Embodiment 3>
Hereinafter, Embodiment 3 according to the present invention will be described.

  The present embodiment is different from the first embodiment in the structure of the body cavity probe unit 11 in the diagnostic imaging apparatus 1. For this reason, description is omitted about the overlapping part.

  FIG. 19 is a cross-sectional view of the detection unit 111 of the body cavity probe unit 11 in the present embodiment.

  As shown in FIG. 19, the detection unit 111 includes a first scintillator 111a_1, a second scintillator 111a_2, a third scintillator 111a_3, a fourth scintillator 111a_4, a fifth scintillator 111b, a first collimator 111c_1, and a second collimator 111c_1. A collimator 111c_2, a third collimator 111c_3, and a fourth collimator 111c_4 are included and have a plurality of channels.

  Each of the first scintillator 111a_1, the second scintillator 111a_2, the third scintillator 111a_3, and the fourth scintillator 111a_4 receives radiation within the subject SU and emits light. Specifically, the first to fourth scintillators 111a_1, 111a_2, 111a_3, and 111a_4 emit gamma rays and beta rays inside the subject to emit light. The first to fourth scintillators 111a_1, 111a_2, 111a_3, and 111a_4 are made of, for example, cesium iodide, and are sequentially arranged so as to cover the periphery of the columnar fifth scintillator 111b, so as to be cylindrical as a whole. Is formed.

  The fifth scintillator 111b supports the first to fourth scintillators 111a_1, 111a_2, 111a_3, and 111a_4, and receives and emits gamma rays that have passed through the first to fourth scintillators 111a_1, 111a_2, 111a_3, and 111a_4. The fifth scintillator 111b is made of, for example, cesium iodide. The fifth scintillator 111b is formed in a cylindrical shape, and the first to fourth scintillators 111a_1, 111a_2, 111a_3, and 111a_4 are arranged so as to cover the circumference of the circumference of the cylindrical shape.

  The first collimator 111c_1, the second collimator 111c_2, the third collimator 111c_3, and the fourth collimator 111c_4 are respectively disposed between the first to fourth scintillators 111a_1, 111a_2, 111a_3, and 111a_4. , Block the light. For example, the first collimator 111c_1 is provided between the first scintillator 111a_1 and the second scintillator 111a_2, and shields light between the first scintillator 111a_1 and the second scintillator 111a_2. The second collimator 111c_2 is provided between the second scintillator 111a_2 and the third scintillator 111a_3, and shields light between the second scintillator 111a_2 and the third scintillator 111a_3. The third collimator 111c_3 is provided between the third scintillator 111a_3 and the fourth scintillator 111a_4, and shields light between the third scintillator 111a_2 and the fourth scintillator 111a_4. The fourth collimator 111c_4 is provided between the fourth scintillator 111a_4 and the first scintillator 111a_1, and shields light between the fourth scintillator 111a_4 and the first scintillator 111a_1.

  In the body cavity probe 11 according to the present embodiment, the instrumentation unit 31 emits light using the signals obtained from the first to fourth scintillators 111a_1, 111a_2, 111a_3, and 111a_4 that emit light using gamma rays and beta rays. A difference is obtained from the signal obtained from the fifth scintillator 111b, and the difference value is obtained as a count value for the beta ray.

  FIG. 20 is a diagram illustrating a synthesized image synthesized by the image synthesis unit 2313 in the present embodiment. 20A is a composite image generated for the slice plane corresponding to the position x2 on the side where the movement of the dummy probe unit 71 ends in FIG. FIG. 20B is an intermediate position between the position where the movement of the dummy probe unit 71 is started and the position where it is ended in FIG. 14, and cancer cells in which radioisotopes are collected in the subject SU. Is a composite image generated for the slice plane corresponding to the position x1. FIG. 20C is a composite image generated for the slice plane corresponding to the position x0 on the side where the movement of the dummy probe 71 starts in FIG.

  In the present embodiment, as shown in FIG. 14, for the slice plane corresponding to the position x0 on the side where the movement of the dummy probe unit 71 is started, as shown in FIG. IA0 is generated. As shown in FIG. 14, the slice plane corresponding to the position x1, which is an intermediate position between the position where the movement of the dummy probe 71 starts and the position where it ends, is shown in FIG. As described above, the slice image IA1 of the axial plane is generated. Further, as shown in FIG. 14, for the slice plane corresponding to the position x2 on the side where the movement of the dummy probe unit 71 is finished, as shown in FIG. 20A, the slice image IA2 of the axial plane is generated. .

  Then, as illustrated in FIG. 20, the radiographic image generation unit 2311 generates a radiographic image so as to correspond to an axial plane that is a slice plane on which the slice image generation unit 2312 has generated the slice image.

  For example, as shown in FIG. 14, as shown in FIG. 20C, a radiation image IR <b> 0 is generated for the slice plane corresponding to the position x <b> 0 on the side where the movement of the dummy probe unit 71 is started. As shown in FIG. 14, the slice plane corresponding to the position x1, which is an intermediate position between the position where the movement of the dummy probe 71 starts and the position where it ends, is shown in FIG. Thus, the radiation image IR1 is generated. Further, as shown in FIG. 14, as shown in FIG. 20A, the radiation image IR <b> 2 is generated for the slice plane corresponding to the position x <b> 2 on the side where the movement of the dummy probe unit 71 is ended.

  Here, in FIG. 14, the intermediate position between the position where the movement of the dummy probe 71 is started and the position where it is ended corresponds to the position x1 of the cancer cell where the radioisotope is collected in the subject SU. The intensity of the radiation detected by the body cavity probe unit 11 is higher than the position x0 on the side where the movement of the dummy probe unit 71 is started and the position x2 on the side where the movement of the dummy probe unit 71 is finished. For this reason, as shown in FIG. 20B, for the radiation image IR1 corresponding to the position x1 of the cancer cell where the radioisotopes have gathered in the subject SU, the position on the side where the movement of the dummy probe unit 71 is started. It is generated so that the color density is deeper than the radiation image IR0 of x0 and the radiation image IR2 of the position x2 on the side where the movement of the dummy probe unit 71 is finished. In the present embodiment, the detection unit 111 of the body cavity probe unit 11 includes the first to fourth scintillators 111a_1, 111a_2, 111a_3, and 111a_4, and has a plurality of channels. Therefore, the body cavity probe unit 11 detects radiation. The radiation images IR0, IR1, and IR2 are generated so as to correspond to the widths of the first to fourth scintillators 111a_1, 111a_2, 111a_3, and 111a_4.

  After that, as shown in FIG. 20, each of the radiographic images IR0, IR1, IR2 generated by the radiographic image generation unit 2311 and each of the slice images IA0, IA1, IA2 generated by the slice image generation unit 2312, As a result of the image composition unit 2313 compositing, the composite images IC0, IC1, and IC2 are generated in the same manner as in the first embodiment.

  As described above, in the present embodiment, similarly to the first embodiment, the combined images IC0, IC1, and IC2 of the radiation images IR0, IR1, and IR2 and the slice images IA0, IA1, and IA2 are generated, and the combined image IC0 is generated. , IC1 and IC2 can be used for image diagnosis.

  For this reason, it is easy to accurately grasp information relating to the diagnostic region, and diagnostic efficiency can be improved.

  Note that the diagnostic imaging apparatus 1 of the above embodiment corresponds to the diagnostic imaging apparatus of the present invention. The body cavity probe unit 11 of the above embodiment corresponds to the body cavity probe unit of the present invention. Moreover, the dummy probe part 71 of said embodiment is corresponded to the insertion member of this invention. The scanning unit 202 in the above embodiment corresponds to the scanning unit of the present invention. The display unit 233 in the above embodiment corresponds to the display unit of the present invention. Further, the probe position detection unit 235 of the above embodiment corresponds to the position detection unit of the present invention. Further, the radiation image generation unit 2311 of the above-described embodiment corresponds to the radiation image generation unit of the present invention. Further, the slice image generation unit 2312 of the above-described embodiment corresponds to the slice image generation unit of the present invention. The image composition unit 2313 in the above embodiment corresponds to the image composition unit of the present invention.

  In implementing the present invention, the present invention is not limited to the above-described embodiment, and various modifications can be employed.

  For example, in the above-described embodiment, the case where the body cavity probe is inserted into the esophagus of the subject SU has been described. However, the present invention is not limited to this.

  For example, in the above-described embodiment, the case where the position of the body cavity probe is detected using the MR marker has been described, but the present invention is not limited to this. For example, the distance at which the body cavity probe is inserted in the subject SU may be measured, and the position of the body cavity probe may be detected based on the measurement result.

  Further, for example, in the above embodiment, the case where the slice image is generated using the magnetic resonance imaging apparatus has been described, but the present invention is not limited to this. For example, the present invention can be applied to a case where a slice image is generated using an X-ray CT apparatus or an ultrasonic diagnostic apparatus.

  For example, in the above-described embodiment, the case where a slice image is generated for one slice plane such as an axial plane and a sagittal plane has been described, but the present invention is not limited to this. For example, the present invention can be applied to a case where slice images for a plurality of slice planes are generated by performing a tomographic transformation process or the like.

FIG. 1 is a diagram showing an image diagnostic apparatus 1 in Embodiment 1 according to the present invention. FIG. 2 is a configuration diagram showing a configuration of the RI probe apparatus 10 according to the first embodiment of the present invention. FIG. 3 is a cross-sectional view of the detection unit 111 of the body cavity probe unit 11 according to the first embodiment of the present invention. FIG. 4 is a side view showing the dummy probe portion 71 in the first embodiment according to the present invention. FIG. 5 is a configuration diagram showing the configuration of the magnetic resonance imaging apparatus 200 in the first embodiment according to the present invention. FIG. 6 is a block diagram showing the image generation unit 231 in Embodiment 1 according to the present invention. FIG. 7 is a flowchart showing the operation of the diagnostic imaging apparatus 1 according to the first embodiment of the present invention. FIG. 8 is a flowchart showing an operation when obtaining radiation detection data using the RI probe apparatus 10 in the first embodiment according to the present invention. FIG. 9 is a side view showing how the body cavity probe unit 11 is inserted into the subject SU in the first embodiment of the present invention. FIG. 10 is a side view showing a state in which radiation is detected inside the subject SU in the first embodiment according to the present invention. FIG. 11 is a diagram illustrating a relationship between the radiation count value C and the position X of the detection unit 111 in the first embodiment of the present invention. FIG. 12 is a flowchart showing an operation when obtaining a magnetic resonance signal for the subject SU using the magnetic resonance imaging apparatus 200 in the first embodiment of the present invention. FIG. 13 is a side view showing a state in which the magnetic resonance signal generated from the MR marker housed in the MR marker housing section 172 of the dummy probe section 71 is received using the MRI apparatus in the first embodiment according to the present invention. is there. FIG. 14 is a side view showing a region where a composite image is generated in the subject SU in the first embodiment of the present invention. FIG. 15 is a diagram showing a synthesized image synthesized by the image synthesis unit 2313 in the first embodiment according to the present invention. FIG. 16 is a diagram illustrating a region where a composite image is generated on the axial surface of the subject SU in the second embodiment of the present invention. FIG. 17 is a diagram showing a synthesized image synthesized by the image synthesis unit 2313 in the second embodiment of the present invention. FIG. 18 is a diagram showing a composite image IC0 displayed by the display unit 233 in the second embodiment according to the present invention. FIG. 19 is a cross-sectional view of the detection unit 111 of the body cavity probe unit 11 according to the third embodiment of the present invention. FIG. 20 is a diagram showing a synthesized image synthesized by the image synthesis unit 2313 in the third embodiment of the present invention.

Explanation of symbols

1: diagnostic imaging device (imaging diagnostic device),
10: RI probe device,
11: body cavity probe part (body cavity probe part),
21: Rotation moving part,
31: Instrumentation part
41: control unit,
51: Display unit,
61: Operation unit,
71: Dummy probe part (insertion member),
200: Magnetic resonance imaging apparatus,
202: Scan unit (scan unit),
203: Operation console section
212: Static magnetic field magnet section,
213: Gradient coil part,
214: RF coil section,
222: RF drive unit,
223: gradient driving unit,
224: Data collection unit
225: control unit,
226: Cradle,
230: control unit,
231: an image generation unit,
232: operation unit,
233: display unit (display unit),
234: storage unit,
235: probe position detector (position detector),
2311: Radiation image generation unit (radiation image generation unit),
2312: Slice image generation unit (slice image generation unit),
2313: Image composition unit (image composition unit),
B: Imaging space

Claims (16)

The intensity of the radiation detected by the body cavity probe unit in the body cavity of the subject based on radiation detection data obtained by detecting the radiation in the body cavity of the subject by the body cavity probe unit inserted into the body cavity of the subject A radiographic image generation unit for generating a radiographic image indicating
An image having a slice image generation unit configured to generate a slice image of a slice plane including the body cavity in the subject based on raw data obtained by scanning the imaging region including the body cavity in the subject. A diagnostic device,
An image combining unit that generates a combined image by combining the radiation image generated by the radiation image generating unit and the slice image generated by the slice image generating unit;
The image composition unit
In the subject, the radiological image is aligned with the slice image and synthesized so that the body cavity probe unit detects the radiation and the radiological image generation unit corresponds to a position where the radiographic image is generated. An image diagnostic apparatus that generates the composite image by the method. The diagnostic imaging apparatus according to claim 1, wherein the radiological image generation unit generates the radiographic image so that a color density differs according to the intensity of the radiation detected by the body cavity probe unit. The diagnostic imaging apparatus according to claim 2, wherein the radiological image generation unit generates the radiographic image such that the color density increases as the intensity of the radiation detected by the body cavity probe unit increases. The diagnostic imaging apparatus according to any one of claims 1 to 3, wherein the radiological image generation unit generates the radiographic image so as to correspond to a detection range in which the body cavity probe unit detects the radiation in the subject. A scan unit for performing the scan,
The scanning unit
The diagnostic imaging apparatus according to any one of claims 1 to 4, wherein a scan for obtaining a magnetic resonance signal from an imaging region of the subject is performed, and the magnetic resonance signal is obtained as the raw data. A position detection unit that detects a position where the insertion member is inserted in the subject in which the insertion member is inserted into a body cavity;
The scan unit performs the scan on the imaging region of the subject corresponding to the position of the insertion member detected by the position detection unit in the subject,
The radiological image generation unit generates the radiographic image for the imaging region of the subject corresponding to the position of the insertion member detected by the position detection unit,
The diagnostic imaging apparatus according to claim 5, wherein the slice image generation unit generates the slice image for the imaging region of the subject corresponding to the position of the insertion member detected by the position detection unit. The slice image generation unit generates the slice image so as to be real time with respect to the scan performed by the scan unit,
The diagnostic imaging apparatus according to claim 6, wherein the image composition unit generates the composite image so that the scan is performed in real time with respect to the scan performed by the scan unit. The diagnostic imaging apparatus according to claim 6, wherein the radiological image generation unit generates the radiographic image so as to be real time with respect to the scan performed by the scan unit. The radiological image generation unit generates the radiographic image so that the insertion member corresponds to a surface along an insertion direction in which the insertion member is inserted into the body cavity of the subject.
The image according to any one of claims 6 to 8, wherein the slice image generation unit generates the slice image so that the insertion member corresponds to a surface along an insertion direction in which the insertion member is inserted into the body cavity of the subject. Diagnostic device. The radiological image generation unit is a surface along an insertion direction in which the insertion member is inserted into the body cavity of the subject, and a surface having a perpendicular to the insertion direction in which the insertion member is inserted into the body cavity of the subject. Generating the radiation image for the surface corresponding to the center of the insertion member at
The slice image generation unit is a surface along an insertion direction in which the insertion member is inserted into the body cavity of the subject, and a surface having a perpendicular to the insertion direction in which the insertion member is inserted into the body cavity of the subject. The diagnostic imaging apparatus according to claim 9, wherein the slice image is generated for a surface corresponding to a center of the insertion member. The radiological image generation unit is a surface along an insertion direction in which the insertion member is inserted into the body cavity of the subject, and a surface having a perpendicular to the insertion direction in which the insertion member is inserted into the body cavity of the subject. Generating a radiation image for a surface corresponding to a position different from the center of the insertion member at
The slice image generation unit is a surface along an insertion direction in which the insertion member is inserted into the body cavity of the subject, and a surface having a perpendicular to the insertion direction in which the insertion member is inserted into the body cavity of the subject. The diagnostic imaging apparatus according to claim 9, wherein the slice image is generated for a surface corresponding to a position different from a center of the insertion member. The radiological image generation unit generates the radiographic image so as to correspond to a surface having a perpendicular to the insertion direction in which the insertion member is inserted into the body cavity of the subject,
The slice image generation unit generates the slice image so that the insertion member corresponds to a surface having a perpendicular to an insertion direction in which the insertion member is inserted into the body cavity of the subject. Diagnostic imaging device. The insertion member is provided with an MR marker that generates the magnetic resonance signal by the scanning performed by the scanning unit,
The scan unit performs a scan to obtain the magnetic resonance signal from the MR marker before performing the scan to obtain the magnetic resonance signal from the imaging region of the subject,
The diagnostic imaging apparatus according to claim 6, wherein the position detection unit detects a position where the insertion member has moved based on a magnetic resonance signal from the MR marker obtained by the scan. The diagnostic imaging apparatus according to claim 13, wherein the MR marker includes a proton. The diagnostic imaging apparatus according to claim 13 or 14, wherein the MR marker is provided so as to be positioned on a distal end side of the insertion member inserted into the subject. The diagnostic imaging apparatus according to claim 1, further comprising: a display unit that displays the composite image generated by the image composition unit on a display screen.