Title :
A new scalable modular data acquisition system for SPECT (PET)
Author :
Stenström, P. ; Rillbert, A. ; Bergquist, Magnus ; Habte, E. ; Bohm, C. ; Larsson, S.A.
Author_Institution :
Dept. of Phys., Stockholm Univ., Sweden
fDate :
6/1/1998 12:00:00 AM
Abstract :
Describes a modular decentralized data acquisition system that continuously samples shaped PMT pulses from a SPECT detector. The pulse waveform data are used by signal processors to accurately reconstruct amplitude and time for each scintillation event. Data acquisition for a PMT channel is triggered in two alternative ways, either when its own signal exceeds a selected digital threshold, or when it receives a trigger pulse from one of its neighboring PMTs. The triggered region is restricted to seven, thirteen or nineteen neighboring PMT channels. Each acquisition module supports three PMT channels and connects to all other modules and a reconstruction computer via Firewire to cover the 72 channels in the Stockholm University/Karolinska Hospital cylindrical SPECT camera
Keywords :
biomedical equipment; data acquisition; image reconstruction; photomultipliers; positron emission tomography; single photon emission computed tomography; Firewire; PET; PMT channel; Stockholm University/Karolinska Hospital cylindrical SPECT camera; accurate reconstruction; medical diagnostic imaging; medical instrumentation; nuclear medicine; scalable modular data acquisition system; scintillation event; selected digital threshold; shaped PMT pulses; signal processors; trigger pulse; Amplitude estimation; Cameras; Data acquisition; Detectors; Firewire; Hospitals; Physics; Positron emission tomography; Pulse shaping methods; Signal design;
Journal_Title :
Nuclear Science, IEEE Transactions on
