Title :
A new scaleable modular data acquisition system for SPECT (PET)
Author :
Stenstr?¶m, P. ; Rillbert, A. ; Bergqvist, M. ; Habte, F. ; Bohm, C. ; Larsson, S.A.
Author_Institution :
Dept. of Phys., Stockholm Univ., Sweden
Abstract :
Describes a modular 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-a high speed serial bus. 24 modules are needed to cover the 72 channels in the Stockholm University/Karolinska Hospital cylindrical SPECT camera
Keywords :
biomedical equipment; data acquisition; image reconstruction; medical image processing; positron emission tomography; single photon emission computed tomography; Firewire; PET; PMT channels; PMT pulses; Stockholm University/Karolinska Hospital cylindrical SPECT camera; amplitude reconstruction; continuous sampling; high speed serial bus; medical diagnostic imaging; nuclear medicine; pulse waveform data; scaleable modular data acquisition system; scintillation event; selected digital threshold; shaped PMT pulses; signal processors; time reconstruction; triggered region; Cameras; Data acquisition; Detectors; Firewire; Hospitals; Image reconstruction; Optical collimators; Physics; Positron emission tomography; Sampling methods;
Conference_Titel :
Nuclear Science Symposium, 1997. IEEE
Print_ISBN :
0-7803-4258-5
DOI :
10.1109/NSSMIC.1997.670484
