{"title":"DOI- and TOF-Capable PET Array Detector Using Double-Ended Light Readout and Stripline-Based Row and Column Electronic Readout","authors":"Fei Wang;Chien-Min Kao;Xiaoyu Zhang;Linfeng Liu;Yuexuan Hua;Heejong Kim;Woon-Seng Choong;Qingguo Xie","doi":"10.1109/TRPMS.2024.3360942","DOIUrl":null,"url":null,"abstract":"We investigate a highly multiplexing readout for depth-of-interaction (DOI) and time-of-flight PET detector consisting of an \n<inline-formula> <tex-math>$N\\times N$ </tex-math></inline-formula>\n crystals whose light outputs at the front and back ends are detected by using silicon photomultipliers (SiPMs). The front \n<inline-formula> <tex-math>$N\\times N$ </tex-math></inline-formula>\n SiPM array is read by using a stripline (SL) configured to support discrimination of the row position of the signal-producing crystal. The back \n<inline-formula> <tex-math>$N\\times N$ </tex-math></inline-formula>\n SiPM array is similarly read by an SL for column discrimination. Hence, the detector has only four outputs. We built \n<inline-formula> <tex-math>$4\\times4$ </tex-math></inline-formula>\n and \n<inline-formula> <tex-math>$8\\times8$ </tex-math></inline-formula>\n detector modules (DMs) by using 3.0-mm\n<inline-formula> <tex-math>$^{3}\\,\\,\\times3.0$ </tex-math></inline-formula>\n-mm\n<inline-formula> <tex-math>$^{3}\\,\\,\\times20$ </tex-math></inline-formula>\n-mm3 lutetium-yttrium oxyorthosilicates. The outputs were sampled and processed offline. For both DMs, crystal discrimination was successful. For the 4\n<inline-formula> <tex-math>$\\times $ </tex-math></inline-formula>\n4 DM, we obtained an average energy resolution (ER) of 14.1%, an average DOI resolution of 2.5 mm, a non DOI-corrected coincidence resolving time (CRT), measured in coincidence with a single-pixel reference detector (refDet), of about 495ps. For the 8\n<inline-formula> <tex-math>$\\times $ </tex-math></inline-formula>\n8 DM, the average ER, average DOI resolution and average CRT were 16.4%, 2.9 mm, and 641ps, respectively. We identified the intercrystal scattering as a probable cause for the CRT deterioration when the DM was increased from 4\n<inline-formula> <tex-math>$\\times $ </tex-math></inline-formula>\n4 to 8\n<inline-formula> <tex-math>$\\times $ </tex-math></inline-formula>\n8.","PeriodicalId":46807,"journal":{"name":"IEEE Transactions on Radiation and Plasma Medical Sciences","volume":null,"pages":null},"PeriodicalIF":4.6000,"publicationDate":"2024-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Transactions on Radiation and Plasma Medical Sciences","FirstCategoryId":"1085","ListUrlMain":"https://ieeexplore.ieee.org/document/10418168/","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING","Score":null,"Total":0}
引用次数: 0
Abstract
We investigate a highly multiplexing readout for depth-of-interaction (DOI) and time-of-flight PET detector consisting of an
$N\times N$
crystals whose light outputs at the front and back ends are detected by using silicon photomultipliers (SiPMs). The front
$N\times N$
SiPM array is read by using a stripline (SL) configured to support discrimination of the row position of the signal-producing crystal. The back
$N\times N$
SiPM array is similarly read by an SL for column discrimination. Hence, the detector has only four outputs. We built
$4\times4$
and
$8\times8$
detector modules (DMs) by using 3.0-mm
$^{3}\,\,\times3.0$
-mm
$^{3}\,\,\times20$
-mm3 lutetium-yttrium oxyorthosilicates. The outputs were sampled and processed offline. For both DMs, crystal discrimination was successful. For the 4
$\times $
4 DM, we obtained an average energy resolution (ER) of 14.1%, an average DOI resolution of 2.5 mm, a non DOI-corrected coincidence resolving time (CRT), measured in coincidence with a single-pixel reference detector (refDet), of about 495ps. For the 8
$\times $
8 DM, the average ER, average DOI resolution and average CRT were 16.4%, 2.9 mm, and 641ps, respectively. We identified the intercrystal scattering as a probable cause for the CRT deterioration when the DM was increased from 4
$\times $
4 to 8
$\times $
8.