Title :
An alternative discriminator design for the Scanditronix SP-3000 time of flight emission tomograph
Author :
Lewellen, Tk ; Pencke, MD ; Bice, An ; Harrison, RL
Author_Institution :
Dept. of Radio., Washington Univ., Seattle, WA, USA
Abstract :
The detector modules for the original versions of the Scanditronix SP3000 positron-emission tomograph (PET) exhibit a consistent nonuniform sensitivity in count rate for paired crystals coupled to single photomultiplier tubes. The detector modules and discriminators used in the original SP3000 machines are described, and possible solutions are examined. The response is corrected by adopting a new discriminator design for the machine.<>
Keywords :
biomedical equipment; computerised tomography; radioisotope scanning and imaging; Scanditronix SP-3000 time of flight emission tomograph; consistent nonuniform sensitivity; count rate; detector modules; discriminator design; paired crystals; single photomultiplier tubes; Circuits; Crystals; Decoding; Delay; Detectors; Energy states; Image reconstruction; Optical coupling; Production systems; Timing;
Journal_Title :
Nuclear Science, IEEE Transactions on
