Title :
A new preprocessor for the SP-3000 series of time-of-flight positron emission tomographs
Author :
Lewellen, T.K. ; Kohlmyer, S.G. ; Ehlert, D.C. ; Miyaoka, R.M.
Author_Institution :
Washington Univ., Med. Center, Seattle, WA, USA
Abstract :
A new preprocessor for the University of Washington modified SP-3000 positron emission tomograph was designed and built. The device improved the maximum coincidence counting rate of the machine to greater than 450000 events per second in preprocessed mode. The new hardware also improved image quality by implementing time-of-flight offset corrections by crystal pairs, position and time-of-flight gating for the rotating sector source (for attenuation scans), and supporting randoms corrections based on estimating singles rates from rejected time-of-flight events. The improved hardware can be installed on any SP-3000 series tomograph with modest modifications to calibration and data acquisition software
Keywords :
biomedical equipment; computerised tomography; radioisotope scanning and imaging; SP-3000 series; University of Washington; attenuation scans; calibration; crystal pairs; data acquisition software; hardware improvement; maximum coincidence counting rate; medical diagnostic imaging; nuclear medicine; preprocessor; randoms corrections; rotating sector source; time-of-flight offset corrections; time-of-flight positron emission tomographs; Attenuation; Biomedical imaging; Calibration; Data acquisition; Detectors; Event detection; Hardware; Image quality; Radioactive decay; Table lookup;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1992., Conference Record of the 1992 IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-0884-0
DOI :
10.1109/NSSMIC.1992.301097
