Title:
COINCIDENCE PROCESSING METHOD FOR SCINTILLATION PULSE EVENT
Document Type and Number:
WIPO Patent Application WO/2019/095411
Kind Code:
A1
Abstract:
Provided is a coincidence processing method for a scintillation pulse event. The method comprises: step S1: acquiring experimental data of a PET system, wherein the experimental data comprises time information of a pair of gamma photons, generated after positive electron annihilation, with the same energy and opposite directions reaching two corresponding detectors, and energy information deposited by the gamma photons in the detectors, the time information respectively being Ti1 and Ti2, and the energy information respectively being Ei1 and Ei2; step S2: setting an energy window and a time window, and acquiring a coincidence event, wherein the energy window is set to be E, the time window is set to be T, and gamma photons satisfying the following conditions are recorded as a pair of true coincidence events: |Ti1-Ti2| ≤ T, Ei1 ≤ E, and Ei2 ≤ E; step S3: carrying out weighting processing on the true coincidence events, wherein enhancement processing uses two formulas; step S4: carrying out image reconstruction, and acquiring an image result; and step S5: analyzing the image result. The present invention uses energy information to allocate the weight of a coincidence event, thereby improving the quality of a reconstructed image, and having strong adaptability.
Inventors:
XIAO PENG (CN)
XU HAO (CN)
WANG WEIDONG (CN)
XU HAO (CN)
WANG WEIDONG (CN)
Application Number:
PCT/CN2017/112337
Publication Date:
May 23, 2019
Filing Date:
November 22, 2017
Export Citation:
Assignee:
RAYCAN TECHNOLOGY CO LTD SUZHOU (CN)
International Classes:
G01T1/29
Domestic Patent References:
| WO2013177661A1 | 2013-12-05 |
Foreign References:
| CN103890611A | 2014-06-25 | |||
| CN103460072A | 2013-12-18 |
Attorney, Agent or Firm:
INTEWIG & PARTNERS (CN)
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