JP2012229960A - Spect apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a SPECT (Single-Photon-Emission Computed Tomography) apparatus having a configuration in which a rotation section can easily rotate 360 degrees around a subject.SOLUTION: The SPECT apparatus includes: a rotation section 10 having a detector 11 for detecting gamma ray radiated from a radiation isotope in a subject 2 on a bed 40 and configured to rotate around a subject 2; and a stationary section 20 rotatably supporting the rotation section 10. The rotation section 10 includes an information processor 12 that creates image information related to a tomographic image inside the subject 2 on the basis of information of the gamma ray transmitted from the detector 11 and transmits it to the stationary section 20. The rotation section 10 and the stationary section 20 are connected to each other via a slip ring 30.

Description

  The present invention relates to the technology of a SPECT apparatus.

Conventionally equipped with a detector that detects gamma rays emitted from radioisotopes in a subject laid on a bed, and a rotating part that can rotate around the subject, and the rotating part can be rotated A technique relating to a SPECT apparatus including a fixing portion that is supported on the base is known (for example, see Patent Document 1).
Further, the SPECT apparatus includes an information processing apparatus that creates image information related to a tomographic image in the subject based on the information related to the gamma rays transmitted from the detector of the rotating unit.

JP 2004-45318 A

However, the information processing apparatus of such a SPECT apparatus is arranged in a fixed part. Such a SPECT apparatus has a large number of cables (one between the rotating part and the fixed part in order to increase the processing speed of the information processing apparatus when creating image information relating to the tomographic image in the subject. The configuration requires about 2,000 cables for each detector.
For this reason, in such a SPECT apparatus, it is difficult for the rotating unit to continuously rotate 360 degrees around the subject.

  The present invention has been made in view of the above situation, and an object of the present invention is to provide a SPECT apparatus having a configuration in which a rotating unit can easily rotate 360 degrees around a subject.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, in claim 1, a rotation unit that includes a detector that detects gamma rays emitted from a radioisotope in a subject on a bed and is configured to be rotatable around the subject; and the rotation unit A rotation unit that rotatably supports the image forming unit, wherein the rotation unit creates image information about the tomographic image in the subject based on the information about the gamma rays transmitted from the detector, and the image information Is transmitted to the fixed part, and includes an information processing device, and the rotating part and the fixed part are connected via a slip ring.

  According to a second aspect of the present invention, the rotating unit includes a power supply circuit that supplies power for causing the rotating unit to perform various operations.

  In Claim 3, the battery which supplies the electric power for making the detection operation which detects the said gamma ray to the detector of the said rotation part is arrange | positioned in the said rotation part, and at the time of rotation of the said rotation part, Stop supplying power from the fixed unit to the detector of the rotating unit for causing the detector to detect the gamma rays, and supply the power from the battery to the detector of the rotating unit. Composed.

  In Claim 4, when the said rotation part rotates, it detects the present position of the said rotation part via the magnescale arrange | positioned at the said rotation part, and is the information regarding the current position of the said rotation part. A position detector configured to be able to transmit certain current position information to the control device, wherein the rotating unit is configured to reach a predetermined position based on target position information that is information on a target position for rotating the rotating unit; The controller is configured to rotate, and the control device compares the current position information with the target position information, and determines whether the rotating unit has moved to the predetermined position based on the target position information. And when the said rotation part rotates to the said predetermined position, the rotation operation | movement of the said rotation part is stopped.

  As effects of the present invention, the following effects can be obtained.

  That is, according to the present invention, the number of cables between the rotating unit and the fixed unit can be reduced, and the rotating unit can be easily rotated 360 degrees around the subject.

The perspective view which showed the whole structure of the SPECT apparatus which shows embodiment of this invention. Similarly side view. (A) is also a front view, (b) is also a rear view. Similarly block diagram. Similarly an enlarged side view. (A) is also an enlarged front view, and (b) is also an enlarged rear view. Similarly, the schematic diagram which showed the rotation part and the fixing | fixed part.

Next, a SPECTC apparatus (Single Photo Emission Computed Tomography) 1 according to an embodiment of the present invention will be described with reference to FIGS.
The SPECT apparatus 1 administers a drug labeled with a radioisotope into the subject 2 and obtains a tomographic image in the subject 2 based on the detection result of gamma rays emitted from the radioisotope in the subject 2. Device.

As shown in FIGS. 1 to 4, the SPECT apparatus 1 includes a rotating unit 10 and a fixed unit 20.
In the SPECT apparatus 1, the rotating unit 10 and the fixed unit 20 are connected via a slip ring 30. The SPECT device 1 is configured such that the rotating unit 10 rotates in a state where the brush is mechanically contacted with the ring-shaped electrode of the slip ring 30, and the fixed unit 20 and the rotating unit 10 are interposed via the slip ring 30. Is configured to perform power supply and transmission / reception of electrical signals.

The rotating unit 10 of the SPECT apparatus 1 is configured to be able to rotate 360 degrees around the subject 2 with the body axis of the subject 2 lying on the bed 40 as a rotation axis.
The rotating unit 10 of the SPECT apparatus 1 includes a plurality of detectors 11, 11... And an information processing apparatus 12.

A plurality of detectors 11, 11... In the rotating unit 10 of the SPECT apparatus 1 detect gamma rays emitted from the radioisotope in the subject 2, and are located inside the rotating ring (on the bed 40. The phase is shifted on the outside of the subject 2.
The detector 11 in the rotating unit 10 of the SPECT apparatus 1 is composed of a gamma camera that captures a two-dimensional distribution of radiation isotopes. The detection element of the detector 11 in the rotating unit 10 of the SPECT apparatus 1 includes one using a scintillator and one using a semiconductor. The detector 11 in the rotating unit 10 of the SPECT apparatus 1 has a collimator that limits the incident direction of the incident radioisotope.
The detector 11 in the rotating unit 10 of the SPECT apparatus 1 is configured to change the information related to the detected gamma ray to an electric signal and transmit it to the information processing apparatus 12.

  The detector 11 in the rotating unit 10 of the SPECT apparatus 1 is configured to be movable in the radial direction with respect to the rotating direction of the rotating unit 10. The detector 11 in the rotation unit 10 moves to the subject 2 side (radial direction with respect to the rotation direction of the rotation unit 10) when detecting gamma rays emitted from the radioisotope in the subject 2, for example. Then, the gamma ray is detected.

  The information processing device 12 in the rotating unit 10 of the SPECT apparatus 1 creates image information related to the tomographic image in the subject 2 based on the information related to the gamma rays transmitted from the detector 11, and stores the image information in the fixing unit 20. Configured to transmit.

The fixed unit 20 of the SPECT apparatus 1 supports the rotating unit 10 (detector 11) in a rotatable manner.
The fixing unit 20 of the SPECT apparatus 1 includes a support frame that is an annular frame. The support frame in the fixed unit 20 of the SPECT apparatus 1 supports the rotating ring (detector 11) in the rotating unit 10 so as to be rotatable.
The fixed unit 20 of the SPECT apparatus 1 is configured to set the operation of the bed 40 and the rotation unit 10, the operation of the bed 40 in the up and down direction, the rotation operation of the rotation unit 10, the detection operation of the detector 11 in the rotation unit 10, and the like. An operation panel 21 for performing the operation is arranged.

The fixing unit 20 of the SPECT device 1 is connected to a power source for driving the SPECT device 1 and a monitor device 50. The fixed unit 20 of the SPECT apparatus 1 transmits image information regarding the tomographic image in the subject 2 transmitted from the information processing apparatus 12 of the rotating unit 10 to the monitor apparatus 50.
The SPECT apparatus 1 is configured such that the image information transmitted to the monitor apparatus 50 is displayed on the monitor apparatus 50 as a tomographic image in the subject 2.
In the present embodiment, the monitor 52 of the PC 51 connected to the fixed unit 20 of the SPECT apparatus 1 is configured as the monitor apparatus 50 (see FIG. 4). Note that the SPECT apparatus 1 is configured by the PC 51 to set the operation of the bed 40 and the rotating unit 10, the operation of the bed 40 in the vertical and longitudinal directions, the rotating operation of the rotating unit 10, the detection operation of the detector 11 in the rotating unit 10, and the like. You may comprise so that it may be performed.

As described above, the SPECT apparatus 1 is configured by the rotation unit 10 integrally including the information processing apparatus 12, and the rotation unit 10 and the fixed unit 20 are connected via the slip ring 30. For this reason, the SPECT apparatus 1 can be configured to reduce the number of cables between the rotating unit 10 and the fixed unit 20.
Therefore, the SPECT apparatus 1 can be configured such that the rotating unit 10 can easily rotate 360 degrees around the subject 2.
Further, according to the SPECT apparatus 1, the rotating unit 10 can be rotated in one direction without limitation. Therefore, when the rotating unit 10 rotates to its rotation limit, it is not necessary to rotate it in the reverse direction. The inspection time for inspecting the specimen 2 can be shortened.

As shown in FIGS. 4 to 6, the rotating unit 10 of the SPECT apparatus 1 includes a power supply circuit 60 that supplies power for causing the rotating unit 10 to perform various operations. The power supply circuit 60 in the rotating unit 10 of the SPECT apparatus 1 includes a power supply circuit that supplies power for driving the driving unit that rotates the rotating unit 10, and the detector 11 in the rotating direction of the rotating unit 10. On the other hand, a power supply circuit that supplies electric power for driving the driving device that is driven to move in the radial direction, and a detector circuit 11a that causes the detector 11 to detect the gamma rays to perform the detecting operation. There is a power supply circuit for supplying the electric power.
As described above, the SPECT apparatus 1 includes the rotating unit 10 integrally including the information processing device 12 and the power supply circuit 60, and the rotating unit 10 and the fixed unit 20 are connected via the slip ring 30. For this reason, the SPECT apparatus 1 can be configured to further reduce the number of cables between the rotating unit 10 and the fixed unit 20.
Therefore, the SPECT apparatus 1 can be configured such that the rotating unit 10 can easily rotate 360 degrees around the subject 2.
Further, according to the SPECT apparatus 1, the rotating unit 10 can be rotated in one direction without limitation. Therefore, when the rotating unit 10 rotates to its rotation limit, it is not necessary to rotate it in the reverse direction. The inspection time for inspecting the specimen 2 can be shortened.

5 or 6 shows the SPECT apparatus 1 in which the rotating unit 10 includes five detectors 11, 11..., The rotating unit 10 includes one to four detectors 11, or The configuration may include six or more units.
Further, in the SPECT apparatus 1, the fixing unit 20 includes a monitor device 50 that displays image information relating to a tomographic image in the subject 2 transmitted from the information processing device 12 of the rotating unit 10 as a tomographic image in the subject 2. It is good also as a structure.

The SPECT apparatus 1 arranges a battery for supplying electric power for detecting a gamma ray to the detector 11 in the rotating unit 10 and detects the gamma ray in the detector 11 when the rotating unit 10 rotates. The supply of electric power from the fixed unit 20 for performing the detection operation to the detector 11 of the rotating unit 10 is stopped, and the electric power for causing the detector 11 to perform the detection operation for detecting the gamma rays from the battery 11 to the detector 11. You may comprise so that it may supply to.
As described above, when the SPECT apparatus 1 is configured, the power generated when the electric power for causing the detector 11 to detect the gamma rays is supplied from the fixed unit 20 to the detector 11 of the rotating unit 10. Noise can be reduced.
At this time, the SPECT apparatus 1 may be configured to be able to replace the battery. Further, the SPECT device 1 may be configured to perform charging by connecting a power cable to the battery or from the fixing unit 20 via the slip ring 30.

Here, the SPECT apparatus 1 uses a predetermined method (for example, via the operation panel 21 or the PC 51) to determine a predetermined position based on target position information that is information regarding a target position for rotating the rotating unit 10. It is comprised so that the rotation part 10 may be rotated.
And SPECT apparatus 1 is good also as a structure provided with the position detector 22 which detects the position which the rotation part 10 rotates, as shown in FIG.
The position detector 22 of the SPECT apparatus 1 detects the current position of the rotating unit 10 via the magnescale 13 disposed in the rotating unit 10 when the rotating unit 10 rotates, and the current position of the rotating unit 10 is detected. The current position information, which is information related to the position of the current position, can be transmitted to the control device. At this time, the control device of the SPECT apparatus 1 compares the current position information with the target position information, determines whether the rotating unit 10 has moved to a predetermined position based on the target position information, and determines the rotating unit 10. Is configured to stop the rotation operation of the rotating unit 10 when it rotates to the predetermined position.
As described above, the SPECT apparatus 1 is configured to be more responsive, inexpensive and highly accurate than the configuration in which the position where the rotating unit 10 rotates is detected using a high-resolution rotary encoder. The rotating unit 10 can be positioned.

More specifically, the magnescale 13 of the SPECT apparatus 1 is arranged in the rotating unit 10 and is configured to rotate with the rotating unit 10 when the rotating unit 10 rotates. The magnet scale 13 of the SPECT apparatus 1 is arranged so as to cover the range of at least 180 degrees of the rotation locus (360 degrees) of the rotating unit 10.
In the SPECT apparatus 1, the two position detectors 22 and 22 are fixed to the fixing unit 20. The two position detectors 22 and 22 are arranged on the outer side of the magnescale 13 of the rotating unit 10 so as to follow the rotation locus of the rotating unit 10. The two position detectors 22 and 22 are arranged so as to be 180 degrees out of phase (facing each other).
A reference point is set on the magnescale 13 of the SPECT device 1 at the upstream end of the rotating unit 10 in the rotational direction. Then, the SPECT apparatus 1 detects the reference point when the rotating unit 10 (magnescale 13) rotates and the reference point passes through one of the two position detectors 22 and 22. The passed position detector 22 is configured to transmit the current position information.
As described above, by configuring the SPECT apparatus 1, it is possible to easily realize a structure capable of positioning the rotating unit 10 with high responsiveness, low cost, and high accuracy.

DESCRIPTION OF SYMBOLS 1 SPECT apparatus 2 Subject 10 Rotating part 11 Detector 12 Information processing apparatus 20 Fixed part 30 Slip ring

Claims (4)

A rotating unit that includes a detector that detects gamma rays emitted from a radioisotope in a subject on a bed and is configured to be rotatable around the subject, and a fixed unit that rotatably supports the rotating unit. And comprising
The rotating unit includes an information processing device that creates image information about a tomographic image in the subject based on information about the gamma rays transmitted from the detector, and transmits the image information to the fixing unit.
A SPECT apparatus in which the rotating part and the fixed part are connected via a slip ring.   The SPECT apparatus according to claim 1, wherein the rotating unit includes a power supply circuit that supplies power for performing various operations of the rotating unit. A battery for supplying power for causing the detector of the rotating unit to detect the gamma rays is disposed in the rotating unit,
During rotation of the rotating unit, supply of power from the fixed unit to the detector of the rotating unit for causing the detector of the rotating unit to detect the gamma rays is stopped, and the rotating unit from the battery Configured to supply the power to a detector of
The SPECT apparatus according to claim 1. When the rotating unit rotates, the current position of the rotating unit is detected via a magnescale disposed in the rotating unit, and current position information that is information on the current position of the rotating unit is A position detector configured to be transmittable to the control device;
The rotating unit is configured to rotate to a predetermined position based on target position information that is information on a target position for rotating the rotating unit,
The control device compares the current position information and the target position information to determine whether the rotating unit has moved to the predetermined position based on the target position information, and the rotating unit Stopping the rotating operation of the rotating part when rotating to a predetermined position;
The SPECT apparatus according to any one of claims 1 to 3.

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