Title :
Effect of scatter from radioactivity outside of the field of view in 3D PET
Author :
Sossi, V. ; Barney, J.S. ; Harrison, R. ; Ruth, T.J.
Author_Institution :
British Columbia Univ., Vancouver, BC, Canada
fDate :
8/1/1995 12:00:00 AM
Abstract :
The contribution of the scattered events originating from radioactivity outside the tomograph field of view (ROFOV) is treated differently by different scatter correction algorithms. Using measured data we have evaluated the amount of scatter originating from ROFOV, its axial and transaxial distribution in two energy windows for direct and a subset of oblique planes in 3D PET. Nonuniform distributions were observed with the total contribution found to be non-negligible when the amount of ROFOV was comparable to the radioactivity in the field of view (FOV)
Keywords :
gamma-ray scattering; positron emission tomography; 3D PET; radioactivity; scatter; scatter correction algorithms; scatter from radioactivity outside field of view; tomograph field of view; Approximation algorithms; Detectors; Energy measurement; Event detection; Hospitals; Iterative algorithms; Iterative methods; Positron emission tomography; Radiology; Scattering parameters;
Journal_Title :
Nuclear Science, IEEE Transactions on
