| 摘要 |
The present invention relates to the technical field of nuclear medicine and high-energy physics, and discloses an online real-time correction method and system for a positron emission tomography (PET) detector. The correction method comprises: acquiring a shifted channel number of a full-energy peak position generated by self-decay of a scintillator containing a radioactive isotope in a shifted energy spectrum after a gain value of a PET detector system is changed and a ratio of a current accumulated energy of each signal channel to a current total accumulated energy of all signal channels in the PET detector system after the gain value of the PET detector system is changed; using the above parameters, an initial channel number of a full-energy peak position generated by self-decay of the scintillator containing the radioactive isotope in an initial energy spectrum and a ratio of an initial accumulated energy of each signal channel to an initial total accumulated energy of all of the signal channels in the PET detector system in a gain adjustment ratio calculation formula to calculate a gain adjustment ratio; and adjusting, according to the gain adjustment ratio, a gain value of the PET detector system. The correction method can separately adjust gain values of respective signal channels, and has a short correction period and low error rate. |
