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A nuclear detector crystal position identification device

A crystal and detection unit technology, applied in the field of nuclear detector crystal position recognition devices, can solve problems such as high cost and large scale, and achieve the effects of reducing system scale, reducing the number of hardware, and reducing costs

Active Publication Date: 2019-05-21
SHENYANG INTELLIGENT NEUCLEAR MEDICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the technical problems of high cost and large scale due to the large number of hardware in the prior art, the present invention provides a nuclear detector crystal position identification device, which reduces the need for hardware on the basis of ensuring the recognition of the crystal position. The quantity, in order to achieve the purpose of reducing hardware cost and reducing the size of the system

Method used

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  • A nuclear detector crystal position identification device
  • A nuclear detector crystal position identification device
  • A nuclear detector crystal position identification device

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Experimental program
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Embodiment 1

[0047] The device for identifying the position of a nuclear detector crystal provided in this embodiment includes: an array of silicon semiconductor detection units, and the array of silicon semiconductor detection units includes silicon semiconductor detection units. Each row of silicon semiconductor detection units of the silicon semiconductor detection unit array has a row signal output terminal, and each column of silicon semiconductor detection units of the silicon semiconductor detection unit array has a column signal output terminal respectively. The silicon semiconductor detection units all have such a connection relationship: the silicon semiconductor detection unit is connected to the row signal output terminal corresponding to the row where the silicon semiconductor detection unit is located through a resistor, and is connected to the column corresponding to the silicon semiconductor detection unit through another resistor. The column signal output terminal connectio...

Embodiment 2

[0064] Nuclear detector imaging first requires the injection of radioactive biotracer drugs (such as 13N–NH, 18F-FDOPA, 18F–FDG, 11C-Acetate, 15O-H2O) in the patient. Synthetic. Biotracers are usually proton-rich nuclides that generate positrons during their decay, and positron (β+) decay usually occurs with artificial radionuclides. The positrons emitted by the radionuclides injected into the body will move about 1mm in the human body and will combine with the negative electrons in the human body to produce annihilation radiation. When the positive and negative electrons are annihilated, two gamma photons with the same energy (511keV) and opposite directions will be generated. . Usually, the event after a pair of photons undergoes annihilation reaction is called a single event.

[0065] The method of coincidence event discrimination is to judge the difference of photon arrival time, when the time difference is less than the time window (usually 3-4.5ns) preset by the coinci...

Embodiment 3

[0076] This embodiment provides a nuclear detector crystal position identification device, based on the first embodiment of the device, see Figure 4 , The nuclear detector crystal position identification device further includes: an integration circuit 11 , a peak hold circuit 12 , a multiplexer 13 , a sampling unit 14 and an energy acquisition unit 15 .

[0077] Wherein, the input end of the integration circuit 11 is correspondingly connected to the row signal output end or the column signal output end of the semiconductor detection unit array, and the output end of the integration circuit 11 is connected to the input end of the peak hold circuit 12 Correspondingly connected, the output end of the peak hold circuit 12 is connected to the multiplexer 13, the multiplexer 13 is connected to the sampling unit 14, and the sampling unit is connected to the energy acquisition unit 15 .

[0078] The integration circuit 11 is used to integrate the electrical signal output from the ro...

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Abstract

The invention discloses a nuclear detector crystal position identification device, comprising: a silicon semiconductor detection unit array, each row of silicon semiconductor detection units has a row signal output terminal, and each column of silicon semiconductor detection units has a column signal output terminal respectively The device also includes a row signal comparison unit connected to the row signal output terminal one by one, and a column signal comparison unit connected to the column signal output terminal one by one; the row signal comparison unit is used to output the voltage of a row of silicon semiconductor detection units The sum is compared with the threshold voltage to obtain a row comparison result; the column signal comparison unit is used to compare the sum of voltages output by a column of silicon semiconductor detection units with the threshold voltage to obtain a column comparison result; the device also includes a crystal position identification unit , used to identify the location of the crystal hit by the photon based on each row comparison result and each column comparison result. The invention realizes the purpose of reducing hardware cost and reducing system scale.

Description

technical field [0001] The invention relates to the field of medical equipment, in particular to a nuclear detector crystal position identification device. Background technique [0002] This section is intended to provide a background or context for embodiments of the invention. The descriptions herein are not admitted to be prior art by inclusion in this section. [0003] Nuclear medicine equipment is currently commonly used detection equipment in medicine, for example, single electron emission computed tomography (SPECT) equipment, positron emission computed tomography (PET) equipment, and the like. Nuclear medicine equipment can form an image of the distribution of drugs containing radionuclides in the body, which can reflect human metabolism, tissue function, and structural form. [0004] In nuclear medicine equipment, the core component is the nuclear detector, which is used to detect the radiation (such as gamma ray) emitted by the radionuclide introduced into the pa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01T1/202
CPCG01T1/247G01T1/2928G01N21/63G01T7/00
Inventor 李楠梁国栋赵玉秋吴国城赵健
Owner SHENYANG INTELLIGENT NEUCLEAR MEDICAL TECH CO LTD