PET detector position coding circuit, method and device

A technology of detector position and encoding circuit, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of high electronic complexity, achieve the effect of maintaining time performance and positioning accuracy, and reducing electronic complexity

Active Publication Date: 2018-05-18
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a position encoding circuit, method and device of a PET detector, aiming to solve the problem of high electronic complexity due to the existing detector position encoding method

Method used

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  • PET detector position coding circuit, method and device
  • PET detector position coding circuit, method and device
  • PET detector position coding circuit, method and device

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Embodiment 1

[0025] figure 1 A position encoding circuit of a PET detector with a common-cathode M*N array structure provided by Embodiment 1 of the present invention is shown. For convenience of description, only parts related to the embodiment of the present invention are shown.

[0026] The PET detector position encoding circuit in the embodiment of the present invention includes M*N detection units 11 and a resistor voltage divider circuit, the resistor voltage divider circuit includes M+N+2 resistors 12, and the detection unit 11 includes a photodetector 111 and two shunt resistors 112, one end of the two shunt resistors 112 is connected to one end of the photodetector 111, the other end of a shunt resistor in the two shunt resistors 112 is connected to the corresponding row signal line, and the other end of the two shunt resistors 112 The other end of a shunt resistor is connected to the corresponding column signal line, each row signal line is connected to two resistors 12, each col...

Embodiment 2

[0029] figure 2 It shows the implementation process of the detector position encoding method of the PET detector provided by Embodiment 2 of the present invention. For the convenience of description, only the parts related to the embodiment of the present invention are shown, and the details are as follows:

[0030] In step S201, the detection signals of each detection unit in the detector array of the PET detector are obtained, and the detection signals of each detection unit are evenly divided into the corresponding row signal lines and column signal lines in the detector array. It is an M*N array, and the detector array includes M*N detection units.

[0031] The embodiment of the present invention is applicable to the PET detector including the detector array described in the first embodiment, so as to facilitate position coding of the detectors in the detector array. In the embodiment of the present invention, the detector array is an M*N array, and the detector array in...

Embodiment 3

[0041] Figure 4 The structure of the detector position encoding device of the PET detector provided by the third embodiment of the present invention is shown. For the convenience of description, only the parts related to the embodiment of the present invention are shown, including:

[0042] The signal distribution unit 41 is used to obtain the detection signals of each detection unit in the detector array of the PET detector, and divide the detection signals of each detection unit into corresponding row signal lines and column signal lines in the detector array. The detector array is an M*N array, and the detector array includes M*N detection units.

[0043] In the embodiment of the present invention, the PET detector includes the position encoding circuit described in Embodiment 1. The detector array of the PET detector is an M*N array, and the detector array includes M*N detection units. The method of applying bias voltage to each detection unit can be a common cathode met...

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Abstract

The invention relates to the medical equipment technical field, and provides a PET detector position coding circuit, method and device; the PET detector position coding circuit comprises M*N detectionunits and a resistance voltage dividing circuit; the resistance voltage dividing circuit comprises M+N+2 resistors; the detection unit comprises one photoelectric detector and two shunting resistors;one ends of the two shunting resistors are connected with one end of the photoelectric detector; the other end of one of the two shunting resistors is connected with a corresponding line signal wire;the other end of the other one of the two shunting resistors is connected with a corresponding column signal wire; the other end of the photoelectric detector is connected with a power supply; the line and column signals are respectively coded by the resistance voltage dividing circuit so as to obtain two line correlation position signals and two column correlation position signals, thus keepingthe PET detector time performance and positioning precision, and reducing the electronics complexity of the PET detector.

Description

technical field [0001] The invention belongs to the technical field of medical equipment, and in particular relates to a position encoding circuit, method and device of a PET detector. Background technique [0002] Silicon Photomultiplier (SiPM for short) is a commonly used photodetector in recent years, which is used in nuclear medicine Positron Emission Tomography (PET) and nuclear physics research. The current PET detector research hotspot is high-performance position-sensitive detector, which usually consists of detector array, position encoding circuit and small scintillation crystal array. The principle of the position-sensitive detector is to determine the specific position of the crystal through the center of gravity of the scintillation light distributed in the detector array in the scintillation crystal. Since the number of channels of the detector array is usually large, the electronic complexity and cost will be high if the single readout method is used. The cur...

Claims

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Application Information

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IPC IPC(8): G01T1/29
CPCG01T1/2985
Inventor 邝忠华杨永峰王晓辉付鑫任宁胡战利桑子儒吴三赵斌清梁栋刘新郑海荣
Owner SHENZHEN INST OF ADVANCED TECH
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