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PET imaging using a triple‐head gamma camera
Author(s) -
Kuikka J. T.,
Sohlberg A.,
HussoSaastamoinen M.
Publication year - 2002
Publication title -
clinical physiology and functional imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.608
H-Index - 67
eISSN - 1475-097X
pISSN - 1475-0961
DOI - 10.1046/j.1475-097x.2002.00439.x
Subject(s) - imaging phantom , medicine , gamma camera , nuclear medicine , image quality , positron emission tomography , physics , artificial intelligence , computer science , image (mathematics)
Summary Interest in clinical fluorodeoxyglucose (FDG) imaging with multiple‐head gamma cameras is growing. To improve sensitivity, triple‐head coincidence imaging has been proposed. We report our initial experiences with a triple‐head coincidence gamma camera with 19 mm sodium iodide crystal thickness. Several positron emission tomography‐image quality parameters were evaluated using a Carlson and line source phantom. The system sensitivity with two‐dimensional axial shields was 830 cps kBq −1 ml −1 and maximum noise equivalent count rate 1900 cps for an 18 F‐activity of 50 MBq. The imaging resolution was in central axial 7·0 mm and in central transaxial 7·6 mm, respectively. The average scatter fraction in scattered media was 29%. Clinical brain, heart and whole body images studies with [ 18 F]FDG were acquired and they show good correlation with the phantom image quality. As a conclusion, triple‐head coincidence gamma camera provides relatively high‐count rate imaging with good contrast and resolution.