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PET image reconstruction method and device

An image reconstruction and image technology, applied in the field of PET image reconstruction, can solve problems such as inaccurate allocation results and affecting PET image quality, and achieve the effects of accurate allocation, improved sensitivity, and high image quality

Active Publication Date: 2018-05-01
SHENYANG INTELLIGENT NEUCLEAR MEDICAL TECH CO LTD
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Problems solved by technology

However, when the number of counts of double coincident data on the LOR is small, this insufficient statistic will lead to inaccurate allocation results if the proportion of double coincident data is still allocated, which in turn will also affect the number of counts according to the coincident data on the LOR. Quality of reconstructed PET images

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  • PET image reconstruction method and device
  • PET image reconstruction method and device

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[0024] 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.

[0025] After the radionuclide is injected into the body of the subject, an annihilation event can be generated in the body, and the γ photons generated by the annihilation event can be detected by the crystal of the PET device. Detection of a single event can be recorded when the crystal detects a gamma photon with an energy above a predetermined energy threshold. If the time coincide...

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Abstract

The invention provides a PET image reconstruction method and device. The method comprises steps: as for any multi-coincidence data, corresponding multiple lines of response (LOR) are determined; the any multi-coincidence data are distributed to the corresponding multiple LOR: as for any LOR, according to a time difference between two single events corresponding to the LOR, the line integral valuecorresponding to the LOR is acquired, according to the ratio among the line integral values corresponding to the multiple LOR, the multi-coincidence data are distributed among the multiple LOR, and the multi-coincidence data distributed to any LOR are multiple distributed data in the LOR; as for any LOR, dual-coincidence data in the LOR and the multiple distributed data are added to obtain line ofresponse data; and a PET image is reconstructed according to the line of response data. Distribution of the multi-coincidence data in the LOR is more accurate, and the quality of the image reconstructed according to the coincidence data of the LOR is higher.

Description

technical field [0001] The present disclosure relates to medical image processing technology, in particular to a PET image reconstruction method and device. Background technique [0002] At present, Positron Emission Computed Tomography (PET) technology has been widely used in important biomedical research fields such as early detection of tumors and drug screening. PET technology injects a radioactive tracer into the subject and detects the photon signal generated by the annihilation event in vitro, and can reconstruct the spatial distribution of the tracer in the body based on the detected data, thereby indirectly obtaining the subject's Physiological and metabolic information. The gamma photon produced by the annihilation event can be detected by the crystal of the PET device. If the energy of the detected gamma photon is higher than the predetermined energy threshold, the gamma photon is recorded as a single event; if the time between two single events is satisfied If ...

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Application Information

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IPC IPC(8): G06T11/00
CPCG06T11/003G06T11/005G01S7/4866G06T11/006G06T2207/10104
Inventor 孙智鹏常杰
Owner SHENYANG INTELLIGENT NEUCLEAR MEDICAL TECH CO LTD
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