PET (Positron Emission Computed Tomography) image reconstruction method and device
An image reconstruction and iterative reconstruction technology, applied in the field of PET image reconstruction, can solve the problems of loss of collected data statistics, increase of calculation amount, time-consuming and other problems, and achieve the effect of improving utilization rate, improving efficiency and reducing calculation amount
Active Publication Date: 2018-06-01
SHENYANG INTELLIGENT NEUCLEAR MEDICAL TECH CO LTD
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However, the data of the scattering coincidence is also two photons produced by the same annihilation event. The above-mentioned direct elimination method will lose the statistics of the collected data, so that the scattering data cannot be fully utilized, and the process of eliminating the scattering data is also difficult. Increases the amount of calculation, consumes time, and reduces the efficiency of image reconstruction
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[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] The coincidence events collected by the PET equipment may include: true coincidence, scattered coincidence and random coincidence.
[0027] True coincidence: For example, two photons can be produced by the same annihilation event, such as Figure 1a As shown, the outgoing directions of the two photons are opposite, which is about 180 degrees.
[0028] Scattering coincidence: Fo...
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The present invention provides a PET (Positron Emission Computed Tomography) image reconstruction method and device. The method includes the following steps that: the emission path of each coincidenceevent is determined according to photon information included in each coincidence event, wherein the coincidence event can be a true coincidence or a scattering coincidence; an annihilation position on the emission path, which is corresponding to the coincidence event, is determined according to the emission path and time data in the photon information; and PET image reconstruction is performed according to the annihilation position, the emission path, and the photon information. With the PET image reconstruction method and device of the present invention adopted, a data utilization rate and the efficiency of image reconstruction can be improved.
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 γ photons produced by the annihilation event can be detected by the crystal of the PET device, and the data collected by the PET device can include: true coincidence, scattered coincidence and random coincidence. When reconstructing the PET image based on the above-mentioned collected data, th...
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IPC IPC(8): G06T11/00
CPCG06T11/003A61B6/5205A61B6/5282G06T11/006A61B6/037G06T7/0012G06T11/005G06T2207/10104
Inventor 刘月孙智鹏李明
Owner SHENYANG INTELLIGENT NEUCLEAR MEDICAL TECH CO LTD