Investigation of the time performance of a LYSO array for TOF-PET

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LIU Jun-Hui, CHENG Jin-Xing, XU Jiong-Hui, CHENG Feng-Feng, LI Dao-Wu, ZHANG Zhi-Ming, WANG Bao-Yi and WEI Long. Investigation of the time performance of a LYSO array for TOF-PET[J]. Chinese Physics C, 2015, 39(12): 128201. doi: 10.1088/1674-1137/39/12/128201
LIU Jun-Hui, CHENG Jin-Xing, XU Jiong-Hui, CHENG Feng-Feng, LI Dao-Wu, ZHANG Zhi-Ming, WANG Bao-Yi and WEI Long. Investigation of the time performance of a LYSO array for TOF-PET[J]. Chinese Physics C, 2015, 39(12): 128201.  doi: 10.1088/1674-1137/39/12/128201 shu
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Received: 2014-06-25
Revised: 2015-06-30
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    Supported by National Natural Science Foundation of China (10775149, 10805049), the Fundamental Research Funds for the Central Universities (2013NT10)

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Investigation of the time performance of a LYSO array for TOF-PET

Fund Project:  Supported by National Natural Science Foundation of China (10775149, 10805049), the Fundamental Research Funds for the Central Universities (2013NT10)

Abstract: Positron Emission Tomography (PET) using time-of-flight information, which can greatly improve the quality of the reconstructed image, has recently become an exciting topic. In this work, 3.2 mm×3.2 mm× 25 mm finger-like LYSO crystals were used to make a 5×5 array, coupled to the Hamamatsu H8500 photomultiplier tube (PMT) as a detector. A fast leading-edge discriminator was designed for the LYSO-H8500 detector. Average coincidence time resolution FWHM of 330 ps was obtained for the LYSO detector with a reference BaF2 detector, whose time resolution for 511 keV γ -rays was FWHM 150 ps. Time resolution FWHM of 294 ps was calculated for the LYSO detector, and coincidence time resolution of FHWM 415 ps can be expected for two identical LYSO detectors.

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