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

Volume

40

Issue

4

fYear

1993

fDate

8/1/1993 12:00:00 AM

Firstpage

1075

Lastpage

1081

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;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.256715

Filename

256715