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Determination method and device of coincidence events

A method and technology for judging events, applied in the field of medical imaging, can solve the problems of loss of count rate of true coincidence events and affect the quality of image reconstruction, and achieve the effect of avoiding loss and improving count rate.

Inactive Publication Date: 2018-01-19
NEUSOFT MEDICAL SYST CO LTD
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Problems solved by technology

However, the current time coincidence judgment method may still cause the loss of the true coincidence event count rate, thereby affecting the quality of image reconstruction

Method used

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  • Determination method and device of coincidence events
  • Determination method and device of coincidence events
  • Determination method and device of coincidence events

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Embodiment Construction

[0025] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present disclosure as recited in the appended claims.

[0026] figure 1 The system structure of a PET equipment is illustrated, and the PET equipment 11 may include: a detection device 12 , a plurality of time calibration boards 13 and a coincidence processing board 14 . Wherein, the detection device 12 may include a plurality of BLOCK modules 15, and each BLOCK module 15 includes a plurality of crystals, and the positron annihilation even...

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Abstract

The invention provides a detection method and device of coincidence events. The method comprises steps of successively receiving single event time acquired in each time slice; splicing the single event time acquired in the initial time segment of the latter time slice in adjacent two time slices with the single event time in the former time slice and carry out coincidence determination; and if thetwo single event time are arranged in the former time slice and the latter time slice respectively and the time intervals of the two single event time are in a coincidence time window, determining that the single events corresponding to the two single event time are coincidence events. According to the invention, loss of coincidence events of cross time slices is avoided and the counting rate oftrue coincidence events is improved.

Description

technical field [0001] The present disclosure relates to medical imaging technology, in particular to a coincident event determination method and device. Background technique [0002] In the imaging diagnostic technology in the medical field, for example, the positron emission tomography (Positron Emission Tomograph, referred to as: PET) system can usually inject a tracer into the body of the object to be scanned, and the PET detector detects what happens in the body. The gamma photon pair released by the positron annihilation event, and then analyze the existence of the positron e+, and obtain the concentration distribution of the tracer in the scanned object, and judge the focus of the disease accordingly. When a detector detects two gamma photons from the same positron annihilation event, it is said to have detected a pair of coincidence events. In the determination of coincident events, one of the bases is time coincidence, that is, the single event time of the single e...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G16H30/00
Inventor 宁鹏杨龙高鹏梁国栋赵玉秋
Owner NEUSOFT MEDICAL SYST CO LTD
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