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Device for adjusting diameter of detector ring of PET (positron emission tomography) system

A technology for adjusting the detector ring and aperture, which is applied in the fields of radiological diagnosis instruments, medical science, diagnosis, etc., can solve the problems of high cost and complex structure, and achieve the effect of saving cost and simplifying the structure.

Active Publication Date: 2016-02-24
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0005] The invention provides a PET system detector ring aperture adjustment device, which can realize the radial movement of the detector, solve the problems of complex structure and high cost of the existing similar devices, and is used to change the size of the detector ring aperture

Method used

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  • Device for adjusting diameter of detector ring of PET (positron emission tomography) system
  • Device for adjusting diameter of detector ring of PET (positron emission tomography) system
  • Device for adjusting diameter of detector ring of PET (positron emission tomography) system

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the accompanying drawings.

[0036] Such as figure 1 As shown, the embodiment of the present invention includes a fixed disk 10 and a rotating disk 20;

[0037] As shown in Figure 2 (A), the fixed disk 10 is a rectangular plate with a central circular hole 11, and there are 48 chutes 12 that are radially distributed around the central circular hole 11, as shown in Figure 2 ( As shown in B), the cross section of the chute 12 is a convex shape, and the extension line of the central axis of each chute 12 intersects at the center of circle of the central circular hole 11;

[0038] As shown in Fig. 3 (A), Fig. 3 (B), and Fig. 3 (C), the rotating disc 20 is a disc with a central through hole 21, and the center of the disc is connected to the central circular hole 11 of the fixed disc. The centers of circles coincide, the aperture of the central through hole 21 is equal to the central circular hole 11,...

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Abstract

The invention discloses a device for adjusting the diameter of a detector ring of a PET (positron emission tomography) system and solves the problem of complex structure and high cost of existing similar devices. The device comprises a fixed plate and a rotating plate, N slide grooves in radial spoke distribution are distributed around a center round hole of the fixed plate, and the surface of the rotating plate is provided with planar thread grooves which form the Archimedean spiral on the surface of the rotating plate. The rotating plate is fixedly suspended on the bottom surface of the fixed plate through a supporting wheel, and moving parts are mounted in the slide grooves of the fixed plate respectively and capable of radically moving along the slide grooves under the rotation action of the planar thread grooves. A connection plate is mounted on the surface of each slide groove of the fixed plate and connected with the corresponding moving part. When the device is in operation, a detector is mounted on each connection plate, and all detectors jointly form the detector ring. A motor drives the rotating plate to rotate so as to drive the detectors to move radically, and accordingly the diameter of the detector ring is changed. Compared with the existing similar devices, the device has the advantages of great structural simplification and cost reduction.

Description

technical field [0001] The invention belongs to the components of medical imaging equipment, and in particular relates to a PET system detector ring aperture adjustment device, which can change the size of the ring aperture of the positron emission tomography detector to adapt to parts of different sizes of the body, thereby improving the performance of the device. sensitivity. Background technique [0002] Positron emission tomography (PET) is a special medical imaging device that can construct an image of the site to be tested to reflect its physiological function according to the specific distribution of radioactive tracers in the human body or animal living body. Existing PET systems include detector rings, data acquisition systems, image reconstruction software, and mechanical components such as hospital beds. [0003] The detector ring of the existing PET system is surrounded by a plurality of detectors to form a ring device, and the aperture size of the ring surround...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/03
CPCA61B6/02A61B6/037
Inventor 许剑锋郭峰彭旗宇陈杰谢思维许光立
Owner HUAZHONG UNIV OF SCI & TECH
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