Title :
Detector characterization of Discovery ST whole-body PET scanner
Author :
Williams, John J. ; McDaniel, David L. ; Kim, Chang L. ; West, Larissa J.
Author_Institution :
Gen. Electr. Med. Syst., Waukesha, WI, USA
Abstract :
A new whole-body PET scanner from General Electric (Discovery ST) is based on 6×6 BGO block detector using quad photo multipliers and utilizes a state of the art data acquisition system. The detector consists of 280 detector units in a ring structure. Each detector unit consists of a BGO block and a quad photomultiplier. The DST scanner has high sensitivity compared to other available whole-body scanners. This paper presents the characterization parameters of the detector including energy resolution, the quality of position maps, temperature dependence, and timing resolution. The data from several production samples are analyzed and compared to the design models. Stability and long-term drift measurements are provided for system sensitivity and PMT gains.
Keywords :
biomedical imaging; photomultipliers; positron emission tomography; DST scanner; characterization parameters; design models; detector characterization; detector unit; discovery ST whole-body PET scanner; energy resolution; photomultipliers; position maps; temperature dependence; timing resolution; whole-body scanners; Data acquisition; Detectors; Energy resolution; Gain measurement; Photomultipliers; Production; Stability; Temperature dependence; Timing; Whole-body PET;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2003 IEEE
Print_ISBN :
0-7803-8257-9
DOI :
10.1109/NSSMIC.2003.1351800
