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
fDate :
8/1/1993 12:00:00 AM
Abstract :
A new preprocessor for the University of Washington modified SP-3000 positron emission tomograph was designed and built. The device improves the maximum coincidence counting rate of the machine to greater than 450000 events per second in preprocessed mode. The new hardware also improves 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 corrections of randoms 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; data acquisition; medical image processing; patient diagnosis; radioisotope scanning and imaging; SP-3000 series; attenuation scans; calibration; crystal pairs; data acquisition software; image quality; maximum coincidence counting rate; preprocessed mode; preprocessor; rejected time-of-flight events; rotating sector source; singles rates; time-of-flight gating; time-of-flight offset corrections; time-of-flight positron emission tomographs; Attenuation; Biomedical imaging; Calibration; Data acquisition; Detectors; Hardware; Image quality; Latches; Radioactive decay; Table lookup;
Journal_Title :
Nuclear Science, IEEE Transactions on
