Title :
A study of data loss and mispositioning due to pileup in 2-D detectors in PET
Author :
Germano, G. ; Hoffman, E.J.
Author_Institution :
Div. of Nucl. Med. & Biophys., California Univ., Los Angeles, CA, USA
fDate :
4/1/1990 12:00:00 AM
Abstract :
The effect of event pileup was investigated with a PET (positron emission tomography) system which employs a 2-D detector-array system. Event pileup caused losses of resolution of 9%, 19.8%, and 32% of the FWHM (full width at half maximum) for 10, 20, and 30 mCi of positron emitter in the field of view (FOV), respectively. 9.4%, 18.7%, and 28.1% of the data from the outer planes of the module were incorrectly placed in the inner planes for 5, 10, and 15 mCi of the positron emitter in the FOV, respectively. A simple model of the process was formulated and found to be adequate to describe the major features of event pileup for a number of source configurations and a wide range of activities
Keywords :
biomedical equipment; computerised tomography; radioisotope scanning and imaging; 2D detectors; PET; data loss; detector-array system; inner planes; mispositioning; outer planes; pileup; positron emission tomography; positron emitter; resolution; source configurations; Detectors; Energy resolution; Event detection; Image resolution; Loss measurement; Nuclear medicine; Photomultipliers; Photonic crystals; Positron emission tomography; Signal processing;
Journal_Title :
Nuclear Science, IEEE Transactions on
