Work

A Time-Walk and Timing-Shift Correction Method for Dual-Ended Readout TOF-DOI PET Detectors

Year: 2024

Type: article

Abstract: Positron emission tomography (PET) detectors suffer from time-walk when the leading edge discriminator is employed for timing pick-off as well as a timing-shift when thick crystals are utilized due to the depth-of-interaction (DOI) effect. In this study, a combined time-walk and timing-shift correction method was proposed for dual-ended readout PET detectors. To evaluate the proposed method, a pair of dual-ended readout PET detectors was constructed. Each detector was based on two Hamamatsu S14161-3050-08 silicon photomultiplier (SiPM) arrays coupled to both ends of an$8\times 8$arrays of$3.1\times 3.1\times 20~{\mathrm { mm}}^{3}$lutetium-yttrium oxyorthosilicate crystals with a 3.2-mm pitch. By employing the relationship between the energies and detected time differences of events, the time-walk and timing-shift were effectively corrected. The coincidence time resolution of the two detectors improved from$260.7~\pm ~1.0$ps to$229.4~\pm ~1.0$ps when a 400–650 keV energy window was used to select events. These results demonstrate the effectiveness of the proposed time-walk and timing-shift correction method.

Source: IEEE Transactions on Radiation and Plasma Medical Sciences

DOI: 10.1109/trpms.2024.3497774

Authors: Haibo Wang, Jiahao Xie, Jinyi Qi, Simon R. Cherry, Junwei Du

Institution: University of California, Davis

Language: English

Topic: Radiation Detection and Scintillator Technologies

Subfield: Radiation

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Institutes of Health, National Institute of Biomedical Imaging and Bioengineering

Awards: G1887239638, G5831041753, G9000106763, G9000155826