An investigation of a coincidence detection system for an all-digital small animal PET scanner

VernacularTitle:全数字化小动物PET符合探测系统的设计与研究
Author: Wei LIU ; Yuanbao CHEN ; Anwen LONG ; Xin CHEN ; Zhongyi WU ; Yongxue ZHANG ; Qingguo XIE
Publication Type:Journal Article
Keywords: Tomography,emission-computed; Animal; Software design
From: Chinese Journal of Nuclear Medicine and Molecular Imaging 2013;(3):223-225
CountryChina
Language:Chinese
Abstract: Objective To investigate and design a coincidence detection system for an all-digital small animal PET scanner and evaluate its preliminary performance properties.Methods This coincidence module adopted a coincidence identification mode based on singles data in list-mode.Using digital signal processing technology,energy calibration,crystal identification,timing alignment and coincidence events extraction were performed on singles data in list-mode.The obtained data could be used for image reconstruction.Results The 13 × 13 crystal array was well recognized by the position histogram of one lutetium yttrium orthosilicate (LYSO) crystal block.In the coincidence timing histogram of the micro-Derenzo phantom,1.36 ns full width at half maximum was obtained.The rods with a diameter of 1.2 mm were clearly displayed in the reconstructed image of the micro-Derenzo phantom.Conclusion The coincidence module can provide satisfactory performance to meet the design needs of an all-digital small animal PET scanner.