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Detector for ray position and energy measurement and signal read-out method

A technology for energy measurement and signal readout, applied in radiation measurement, X/γ/cosmic radiation measurement, measurement devices, etc., can solve the problems of high cost and large quantity, and achieve the reduction of usage, scale, and reduction. effect of quantity

Active Publication Date: 2018-02-23
SHANDONG MADIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, although silicon photomultiplier tube arrays are cheaper than photomultiplier tubes, the total cost is still high due to the large number
How to effectively control the circuit scale and reduce equipment cost is still a huge challenge

Method used

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  • Detector for ray position and energy measurement and signal read-out method
  • Detector for ray position and energy measurement and signal read-out method
  • Detector for ray position and energy measurement and signal read-out method

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Embodiment Construction

[0021] figure 1 , figure 2 A radiation detector capable of measuring the position and energy of rays, comprising a scintillation crystal array 1, a high reflectivity material 2 and 4 silicon photomultiplier tube arrays 3-6, through adjacent 4 silicon photomultiplier tube arrays 3-6 6 emits light from the crystals collected, the energy of the ray and the position where the ray hits the scintillation crystal array 1 can be calculated. In order to reduce the number of silicon photomultiplier tube arrays 3-6, the distance between adjacent silicon photomultiplier tube arrays 3-6 can be enlarged and the gaps can be filled with high light reflectivity material 2, so as to ensure light collection efficiency. The energy of the ray and the position where the ray hits the crystal can be calculated through the luminescence collected by the crystal on the 4-piece silicon photomultiplier tube array 3-6. The specific calculation formula is:

[0022] (1)

[0023] (2)

[0024] (...

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Abstract

The invention discloses a detector for the ray position and the energy measurement and a signal read-out method. The detector comprises a scintillation crystal array, a photolectric transducer array and a high-reflective-rate medium, wherein the photolectric transducer array is composed of multiple pieces of silicon photomultiplier tube arrays distributed in the longitudinal and transverse arrangement. A gap is reserved between adjacent silicon photomultiplier tube arrays and the gap is filled with the high-reflective-rate material so as to improve the collection efficiency of the scintillation light. Through enlarging the gap between adjacent silicon photomultiplier tube arrays, the number of silicon photomultiplier tube arrays is greatly reduced and the cost is obviously reduced. All output signals of one piece of the silicon photomultiplier tube array are connected in parallel into one output signal and then the signal is digitized. In this way, the number of signal channels is greatly reduced. The parallel output signals of the multiple pieces of silicon photomultiplier tube arrays are processed by a preprocessing circuit, and then are digitized. As a result, the number of signal channels is further reduced.

Description

technical field [0001] The invention relates to the field of nuclear medicine imaging equipment, and relates to a detector and a signal readout method for ray position and energy measurement. The method can be applied to nuclear medicine imaging equipment including PET, SPECT and gamma cameras. Background technique [0002] In nuclear medicine imaging equipment such as PET, SPECT, and gamma cameras, position and energy measurements of gamma rays are required. At present, the most important PET detector is a scintillator detector plus a photoelectric conversion device. After the rays hit the scintillator, the scintillation fluorescence is converted into an electrical signal by the photoelectric conversion device, and then sent to the electronic system for processing. [0003] Common photoelectric conversion devices include photomultiplier tubes, position-sensitive photomultiplier tubes, and silicon photomultiplier tubes. A photomultiplier tube is a vacuum tube. After photons...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/164
CPCG01T1/1645
Inventor 刘继国
Owner SHANDONG MADIC TECH CO LTD
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