JPH11190776A - Body / body contour display - Google Patents

Abstract

(57) [Summary] [Problem] To provide an in-body / body-contour display device that can clearly grasp the positional relationship between an in-vivo image of an organ or the like and a body contour or a body surface on the same screen. . SOLUTION: A gamma camera 2 collects a two-dimensional distribution image and a three-dimensional distribution image of a radiopharmaceutical taken into a subject. The optical camera 3 is configured by a digital camera, and captures an optical image of the subject on the couch top 41. The couch device 4 includes a couch top 41 on which the subject is placed,
A bed vertical movement mechanism 42 for vertically moving the bed 41, a table moving mechanism 43 for horizontally moving the bed 41, and a table position detecting unit 44 for detecting a table movement position are provided. The data processing device 5 extracts the body surface image data from the optical camera 3 by the body outline extracting unit 52 and combines the body surface image data with the image data from the gamma camera 2 by the image combining unit 51.
The information is displayed on the display device 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a body / body image obtained from a gamma camera used for nuclear medicine diagnosis, which is displayed in association with a body contour or body surface image, thereby facilitating confirmation of the position of an examination part. The present invention relates to a body contour combined display device.

[0002]

2. Description of the Related Art Conventionally, a radioisotope (hereinafter abbreviated as RI) or a labeled compound thereof has been used to selectively take up into a specific tissue or organ in a living body. Is measured from outside the body and the dose distribution of RI is imaged to make a diagnosis. This method is called a nuclear medicine diagnostic method.

[0003] In the nuclear medicine diagnostic method, since the principle itself that a labeling substance is accumulated in a specific tissue or organ is linked to the physiological function and biochemical substance metabolizing function of the tissue or organ, morphological diagnosis is performed. Not only the diagnosis but also the function diagnosis at an early stage of the lesion is possible, which is a great feature not found in other diagnostic methods.

In this nuclear medicine diagnosis method, a scintigram for obtaining a two-dimensional distribution image using a scinti scanner or a gamma camera, and detection data obtained by rotating the gamma camera around a subject are reconstructed. SPECT (Single Photon Emission Computed Tom)
ography).

[0005]

However, an image obtained from a gamma camera used for nuclear medicine diagnosis is only an in-vivo image of an organ or the like, and the positional relationship between the body surface and the organ cannot be easily determined. For example, in an image of an organ only, when performing a surgery or the like when the organ has a tumor, it is not easy to determine which position on the body surface to insert a scalpel.

The present invention displays an in-vivo image of an organ or the like and a body contour or body surface on the same screen, so that the positional relationship between the two can be clearly grasped, and the in-vivo image and the like at the time of surgery can be specified. -It is an object to provide a body contour combined display device.

[0007]

According to a first aspect of the present invention, there is provided an in-body / body-contour display device, comprising: a bed having a top plate on which a subject is placed; A gamma camera that detects gamma rays emitted from a radiopharmaceutical administered to a sample to obtain a two-dimensional or three-dimensional distribution image of the radiopharmaceutical in the body, and a body surface image data by capturing an optical image of the subject An optical camera that outputs the optical camera, a moving unit that relatively moves the optical camera and the gamma camera and the top board so that a region of interest of the subject is included in the effective field of view of the optical camera or the gamma camera, and a gamma camera Position measuring means for measuring the relative position of the camera and the top plate and the relative position of the optical camera and the top plate to obtain position data;
Image synthesizing means for aligning an image obtained by a gamma camera with a body surface image obtained by an optical camera based on the position data obtained by the position measuring means to generate a synthesized image. It has a characteristic configuration.

[0008] With this configuration, a composite image can be displayed by aligning the image obtained by the gamma camera with the body surface image obtained by the optical camera, so that the positional relationship between the two can be clearly grasped.

According to a second aspect of the present invention, there is provided an in-body / body-contour display device, comprising: a bed having a top plate on which a subject is placed; and a gamma radiated from a radiopharmaceutical administered to the subject.
A gamma camera that obtains a two-dimensional distribution image or a three-dimensional distribution image of a radiopharmaceutical in the body by detecting a line, an optical camera that captures an optical image of a subject and outputs body surface image data, and an optical camera obtained from the optical camera Body contour extraction means for extracting a body contour from the obtained body surface image to generate a body contour image, an optical camera and an optical camera so that a region of interest of the subject is included in an effective field of view of the optical camera or the gamma camera. Moving means for relatively moving the gamma camera and the couchtop; position measurement means for measuring the relative position between the gamma camera and the couchtop and the relative position between the optical camera and the couchtop to obtain position data; Image synthesizing means for aligning the image obtained by the gamma camera based on the position data obtained by the measuring means with the body contour image from the body contour extracting means to generate a synthesized image. Characterized in that it Bei.

[0010] With this configuration, a composite image can be displayed by aligning the image obtained by the gamma camera with the body contour image extracted from the body surface image of the optical camera, so that the positional relationship between the two can be clearly grasped.

According to a third aspect of the present invention, there is provided a display device for a combined body and body contour, comprising: a bed having a top plate on which a subject is placed; and a gamma radiated from a radiopharmaceutical administered to the subject.
A gamma camera that detects a line to obtain a two-dimensional or three-dimensional distribution image of a radiopharmaceutical in the body, a distance measurement unit that measures the distance to the body surface of the subject and outputs distance data, and a distance measurement unit. A body contour generating means for generating a body contour image based on distance data from the means, and a body contour generating means and a gamma such that the region of interest of the subject is included in the effective field of view of the body contour generating means or the gamma camera. Moving means for performing relative movement between the camera and the tabletop, position measuring means for measuring the relative position between the gamma camera and the tabletop and the relative position between the body contour generating means and the tabletop to obtain position data, An image synthesizing method for aligning an image obtained by the gamma camera based on the position data obtained by the position measuring means with a body outline image obtained by the body outline generating means to generate a composite image. Characterized by comprising a means.

[0012] According to this configuration, the composite image can be displayed by aligning the image obtained by the gamma camera with the body contour image generated from the distance data to the body surface, so that the positional relationship between the two can be clearly grasped.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram of a first embodiment of a display device for both internal and external contours according to the present invention. The in-body / body-contour display device 1 includes a gamma camera 2, an optical camera 3,
It comprises a couch device 4 and a data processing device 5.

The gamma camera 2 has a detector 21 which is a γ-ray detector rotatably mounted around an effective visual field center (rotation center) 6 and supports the detector 21 so as to be movable in a radial direction of rotation. A radial dynamic support portion 22, a detector rotary support portion 23 for supporting the radial dynamic support portion 22, a rotation mechanism portion 24 for rotating the detector rotary support portion 23 around the effective visual field center 6, and a detector. A mechanism control unit (not shown);
a γ-ray data acquisition unit (not shown).
With this configuration, the gamma camera 2 can collect a two-dimensional distribution image and a three-dimensional distribution image of the radiopharmaceutical taken into the subject.

The optical camera 3 is composed of a digital camera such as a CCD camera, and captures an optical image of the subject on the couch top 41 and outputs digital image data.

The couch device 4 includes a couch top 41 on which a subject is mounted, a couch vertical movement mechanism 42 whose base is fixed to the floor, and which moves the couch top 41 up and down;
A top plate moving mechanism 43 that horizontally moves 1 to the effective field of view of the optical camera 3 and the effective field of view in the slice direction of the gamma camera 2.
And a top position detection unit 44 for detecting the top moving position. In the present embodiment, the top position detecting unit 4
4 converts the linear moving distance of the couch top into a rotation angle of the pinion by a rack fixed to the couch top 41 and a pinion provided at the base of the couch, and by a rotary encoder arranged on the pinion shaft, A pulse corresponding to the moving distance is generated and counted by a counter.

FIG. 2 shows a data processing apparatus 5 according to this embodiment.
3 is a functional block diagram of FIG. As the data processing device 5, a workstation provided with a display device 6 is used, and can control the entire system of the in-body / body-contour display device 1 and perform image processing. The body surface image data from the optical camera 3 and the image data from the gamma camera 2 are combined by the image combining unit 51 and displayed on the display device 6.
Alternatively, the body contour data is extracted from the body surface image data from the optical camera 3 by the body contour extracting unit 52, and the image synthesizing unit 5
At 1, the image data is synthesized with the image data from the gamma camera 2 and displayed on the display device 6. The switching unit 53 switches between synthesizing the body surface image data from the optical camera 3 with the image data from the gamma camera 2 as it is or extracting and synthesizing the body contour data. In the present embodiment, the body outline data is extracted by the body outline extraction unit 52, and the image synthesis unit 5
1 shows an example of obtaining a composite image.

FIG. 3 is a diagram showing a relationship between a gamma camera and an optical camera and a subject, and FIG. 3A shows an example in which an optical camera is built in a gamma camera detector.
(B) shows an example in which an optical camera is provided outside the gamma camera detector. In order to match the effective fields of view of the gamma camera and the optical camera, the data processing device 5 captures each position data from the tabletop position detector 44 together with the image data from the gamma camera and the optical camera.

Next, an inspection procedure according to the present embodiment will be described. In the present examination procedure, the head of the subject is illustrated as a region of interest, but the region of interest is not limited to this.

First, a radiopharmaceutical, RI, or a labeled compound thereof, which is selectively taken into tissues or organs in the region of interest of the subject, is administered. As the RI or its labeled compound, a compound having an appropriate physiological activity may be selected according to the desired test content. Next, the couch top 41 is moved by the couch vertical movement mechanism 42 so that the subject can easily get on the couch.
Is lowered, and the subject lies on the couch top 41. Next, the couch top 41 rises, and the rise is stopped at a height where the center of the body axis of the subject coincides with the center 6 of the effective visual field. Next, the couchtop 41 on which the subject is placed is horizontally moved leftward, and when the subject reaches the optical camera shooting position, the couch top 41 is temporarily stopped and an optical image is shot. Subsequently, when reaching the gamma camera imaging position, a planar (Planer) image (two-dimensional distribution image) corresponding to the RI dose distribution is obtained.

FIG. 4 shows a planar image of an internal organ of the subject's head obtained by a gamma camera. FIG. 5 shows a body contour image obtained by extracting a body contour from a body surface image obtained by an optical camera. Is shown. The data processing device 5 aligns and combines the in-vivo organ planar image and the body contour image based on each imaging position data from the tabletop position detection unit 44 to obtain a combined image shown in FIG. As a result, the positional relationship between the two can be clearly grasped, and the position of the inspection site can be easily confirmed.

Next, as another embodiment, an example in which body image data from the optical camera 3 and image data from the gamma camera 2 are combined by the image combining unit 51 will be described.
The image synthesizing unit 51 extracts every other pixel data from the body surface image data from the optical camera 3 as shown in FIG. Similarly, every other pixel data of the image data from the gamma camera 2 is extracted, and the extracted data is alternately arranged to obtain a composite image. As a result, as shown in FIG. 8, a combined image in which the in-vivo organ image and the body surface image are superimposed is obtained. As a result, the positional relationship between the two can be clearly grasped, and the operating position at the time of surgery can be easily specified.

As another method of superimposing images,
The colors of the corresponding pixels of each superimposed image can be mixed to form a composite image.

FIG. 9 shows a detector used in a second embodiment of the in-body / body-contour display device according to the present invention.
(A) is a plan view and (b) is a side view. In the present embodiment, distance measuring devices 21a for measuring the distance of the subject to the body surface are arranged at both ends of the detector 21, and a body contour image is generated based on the distance data.

FIG. 10 is a functional block diagram of the data processing device 5 of the present embodiment. The body contour generation unit 54 generates a body contour image based on the distance data from the distance measuring device 21a. Then, in the image synthesizing unit 51, the gamma camera 2
And displays the image data on the display device 6.

Next, a method of calculating the distance to the body surface using the distance measurement result of the distance measuring device 21a will be described with reference to FIG. The distance d to the body surface A of the subject is measured by the distance measuring device 21a. Since the angle θ between the rotation center and the center of the visual field of the gamma camera and the distance measuring device 21a is known in advance, the distance e and the distance f can be obtained from the distance d. And from the formula {(c / 2) -be},
The distance g in the visual field from the center of the visual field of the gamma camera to the measurement point B is obtained. Further, a distance (a + f) from the detector 21 to the body surface A is obtained. At the time of SPECT acquisition, the distance g and the distance (a + f) are both calculated in units of several degrees, and a body contour image is obtained using the calculation result when reconstructing a tomographic image.

Next, a control procedure according to this embodiment will be described.
First, when the couchtop 41 on which the subject is placed reaches the gamma camera shooting position, the couchtop 41 stops and the data processing device 5 executes the SPE.
A CT acquisition start signal is sent to the gamma camera mechanism control unit and the gamma camera acquisition unit. As a result, the rotation control signal is sent from the detector mechanism control unit to the rotation mechanism unit 24, the SPECT image projection data obtained from the detector 21 is collected by the gamma camera collection unit, and the data processing is performed for SPECT image reconstruction. To the distance measuring device 21
The distance data from “a” is also sent to the data processing unit 5. Then, a body contour image is generated together with the SPECT image reconstruction.

FIG. 12 shows a SPECT tomographic image of the internal organ of the subject's head obtained by the gamma camera.
Shows a body contour image generated by the body contour generation unit of the present embodiment.

The data processing device 5 includes a top plate position detector 44
Internal organ SPECT based on each measurement position data from
The tomographic image and the body contour image are aligned and synthesized, and FIG.
Is obtained. As a result, the positional relationship between the two can be clearly grasped, and the position of the inspection site can be easily confirmed.

[0031]

As described above, the in-body / body contour combined display device according to the first aspect of the present invention aligns an image obtained by a gamma camera with a body surface image obtained by an optical camera. Since the combined image can be displayed by using the image, it is particularly suitable for displaying the combined use of the planar image and the body surface image, the positional relationship between the two can be clearly understood, and the operating position during the operation can be easily specified.

[0032] The display apparatus for combined use of body and body contours according to a second aspect of the present invention aligns an image obtained by a gamma camera with a body contour image extracted from a body surface image of an optical camera to form a composite image. Since it can be displayed, it is particularly suitable for the combined use display of the planar image and the body contour image, the positional relationship between the two can be clearly grasped, and the position of the examination region can be easily confirmed.

[0033] The display device for combined use of the body and the body contour according to the third aspect of the present invention aligns the image obtained by the gamma camera with the body contour image generated from the distance data to the body surface to form a composite image. Since it can be displayed, it is particularly suitable for the combined use display of the SPECT tomographic image and the body contour image, and the positional relationship between the two can be clearly grasped, and the position of the examination region can be easily confirmed.

[Brief description of the drawings]

FIG. 1 is a diagram showing a first embodiment of a display device for both internal and external contours according to the present invention.
It is a lineblock diagram of an embodiment.

FIG. 2 is a functional block diagram of the data processing device according to the first embodiment.

3A and 3B are diagrams illustrating a relationship between a gamma camera and an optical camera and a subject, wherein FIG. 3A is a diagram in which an optical camera is built inside a gamma camera detector, and FIG. FIG. 4 is a diagram in which an optical camera is attached to a section.

FIG. 4 is a diagram showing a planar image of an in-vivo organ of the subject's head obtained by a gamma camera.

FIG. 5 is a diagram showing a body contour image obtained by extracting a body contour from a body surface image obtained by an optical camera.

FIG. 6 is a view showing a composite image obtained by superimposing a body organ planar image and a body contour image.

FIG. 7 is a diagram showing a body surface image in which every other pixel data is extracted.

FIG. 8 is a diagram showing a composite image obtained by superimposing a body organ image and a body surface image.

FIG. 9 is a second view of the in-body / body-contour display device according to the present invention.
3A and 3B show a detector used in the embodiment of the present invention, wherein FIG. 3A is a plan view and FIG.

FIG. 10 is a functional block diagram of a data processing device according to a second embodiment.

FIG. 11 is an explanatory diagram of a method of calculating a distance to a body surface using a measurement result of the distance measuring device.

FIG. 12 is a diagram showing a SPECT tomographic image of an internal organ of a subject's head obtained by a gamma camera.

FIG. 13 is a diagram illustrating a body contour image in which a body contour is generated from a measurement result of the distance measuring device.

FIG. 14 is a diagram showing a composite image obtained by superposing a body organ SPECT tomographic image and a body contour image.

[Explanation of symbols]

DESCRIPTION OF REFERENCE NUMERALS 1: Display device for combined use of body and body contours, 2: Gamma camera, 3
... optical camera, 4 ... bed device, 5 ... data processing device, 2
DESCRIPTION OF SYMBOLS 1 ... Detector, 22 ... Radial movement support part, 23 ... Detector rotation support part, 24 ... Rotation mechanism part, 41 ... Couch top plate, 42 ... Couch vertical movement mechanism, 43 ... Couch top movement mechanism, 44 ... Top plate Position detector.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Toshio Yamaguchi 2-16-4 Akabane, Kita-ku, Tokyo Inside Toshiba Medical System Engineering Co., Ltd. (72) Inventor Hitoshi Kobayashi 2--16 Akabane, Kita-ku, Tokyo No. 4 Inside Toshiba Medical System Engineering Co., Ltd.

Claims (3)

[Claims] 1. A bed having a top plate on which a subject is placed, and a two-dimensional distribution image or 3D of a radiopharmaceutical in the body by detecting γ-rays emitted from the radiopharmaceutical administered to the subject.
A gamma camera that obtains a dimensional distribution image, an optical camera that captures an optical image of the subject and outputs body surface image data, and a region of interest of the subject is included in the effective field of view of the optical camera or the gamma camera. Means for moving the optical camera and the gamma camera relative to the top panel, and measuring the relative position between the gamma camera and the top panel and the relative position between the optical camera and the top panel to obtain position data Means, and image synthesizing means for aligning an image obtained by a gamma camera with a body surface image obtained by an optical camera based on the position data obtained by the position measuring means to generate a synthesized image. A display device for combined use of a body and a body contour. 2. A bed having a top plate on which a subject is placed, and a two-dimensional distribution image or 3D of a radiopharmaceutical in the body by detecting γ-rays emitted from the radiopharmaceutical administered to the subject.
A gamma camera for obtaining a three-dimensional distribution image, an optical camera for capturing an optical image of a subject and outputting body surface image data, and a body contour extracted from a body surface image obtained from the optical camera to obtain a body contour image Body contour extraction means for generating, and moving means for performing relative movement of the optical camera and the gamma camera and the top board so that the region of interest of the subject is included in the effective field of view of the optical camera or the gamma camera, Position measuring means for measuring relative positions of the gamma camera and the top plate and relative positions of the optical camera and the top plate to obtain position data; and obtaining the position data by the gamma camera based on the position data obtained by the position measuring means. Image combining means for aligning the obtained image and the body contour image from the body contour extracting means to generate a combined image, wherein the combined body / body contour display device is provided. 3. A bed having a top plate on which a subject is placed, and a two-dimensional distribution image of the radiopharmaceutical in the body by detecting γ-rays emitted from the radiopharmaceutical administered to the subject.
A gamma camera for obtaining a three-dimensional distribution image, a distance measuring means for measuring the distance of the subject to the body surface and outputting distance data, and a body contour generation for generating a body contour image based on the distance data from the distance measuring means Means for moving the body contour generating means and the gamma camera relative to the top plate so that the region of interest of the subject is included in the effective field of view of the body contour generating means or the gamma camera; and a gamma camera. Position measurement means for measuring the relative position between the body and the top plate and the relative position between the body contour generation means and the top plate, and obtaining position data; and a gamma camera based on the position data obtained by the position measurement means. Image synthesizing means for aligning the obtained image and the body outline image obtained by the body outline generating means to generate a synthesized image, Display devices.