A coincidence processing method of a scintillation pulse event

A processing method and technology of scintillation pulses, which are applied in image data processing, radiation measurement, 2D image generation, etc., can solve the problems of inconvenient practical application, scintillation pulse events conforming to processing errors, etc., achieve simple implementation and improve image reconstruction quality , Improve the effect of reconstructed image quality

Active Publication Date: 2019-05-28
RAYCAN TECH CO LTD SU ZHOU
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Problems solved by technology

[0006] The purpose of the present invention is to provide a coincident processing method of scintillation pulse events, so as to solve the problem that errors exist in the coincident processing of scintillation pulse events in the prior art and are not convenient for practical application

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  • A coincidence processing method of a scintillation pulse event
  • A coincidence processing method of a scintillation pulse event
  • A coincidence processing method of a scintillation pulse event

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with specific embodiments. It should be understood that the following examples are only used to illustrate the present invention but not to limit the scope of the present invention.

[0036] The consistent processing method of the scintillation pulse event provided by the present invention is used for the data processing in the PET system, mainly comprises the following steps:

[0037] Step S1: Obtain experimental data, the experimental data is the time information of the arrival of the gamma photon generated after the positron annihilation to the detector, the energy information of the gamma photon deposited in the detector, and the position information of the gamma photon, the corresponding two The time information of the gamma photons collected by the detector is T i1 and T i2 , the energy information is E i1 and E i2 ;

[0038] Step S2: Set the energy window and time window to obtain coinciden...

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Abstract

The invention provides a coincidence processing method of a scintillation pulse event. The method comprises the following steps: S1, acquiring experimental data of the PET system; wherein the experimental data comprises time information that a pair of gamma photons with the same energy and opposite directions generated after positron annihilation arrives at two corresponding detectors and energy information that the gamma photons deposit in the detectors; wherein the time information is Ti1 and Ti2 respectively; wherein the energy information is Ei1 and Ei2; s2, a step S2 is performed; settingan energy window and a time window and acquiring a coincidence event; energy window setting E, time window setting to T, wherein the gamma photons meeting the following conditions are marked as a pair of true coincidence events: |Ti1-Ti2|<=T, Ei1<=E, and Ei2<=E. The method comprises the following steps: S3, carrying out weighting processing on the true coincidence events, and carrying out enhancement processing by adopting two formulas, S4, carrying out image reconstruction to obtain an image result, and S5, analyzing the image result. The weights of the coincidence events are distributed byutilizing the energy information, the quality of the reconstructed image is improved, and the adaptability is high.

Description

technical field [0001] The invention relates to a scintillation pulse processing method in the field of positron emission computed tomography imaging, and more particularly to a coincident processing method of scintillation pulse events. Background technique [0002] PET (Positron Emission Tomography, positron emission tomography, hereinafter referred to as PET) is a non-invasive nuclear medicine imaging method. After the radioactive tracer is injected into the human body or animal body, the tracer will show different concentration distributions in different parts of the human body or animal body according to the metabolic level in different parts of the human body or animal body. The β+ decay of radioactive substances in the human body or animals produces positrons, and the annihilation of the positrons and the electrons in the human body or animals produces a pair of gamma photons with the same energy but opposite directions. Therefore, gamma photons are measured by extern...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T11/00
CPCG01T1/29G06T11/00
Inventor 肖鹏徐浩王卫东
Owner RAYCAN TECH CO LTD SU ZHOU
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