Single photon scatter compensation by photopeak energy distribution analysis
- 1 June 1992
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Medical Imaging
- Vol. 11 (2) , 161-164
- https://doi.org/10.1109/42.141639
Abstract
Scattered photons degrade nuclear medicine image contrast and resolution, and preclude simple attenuation corrections. Current scatter correction methods utilize detected events with energies below pulse height analyzer (PHA) window levels, making attenuation corrections source position dependent. This new scatter rejection technique analyzes only the photon signals occurring within the range of standard PHA windows. In real time, at each image location the PHA window energy distribution is analyzed, a scatter fraction determined, and a scatter corrected number of events are output. The method can be adapted to any imaging system which produces event location and energy signals. Attenuation corrections (u=0.15 cm(-1), 140 keV) are within 6% for 2-10 cm depths.Keywords
This publication has 1 reference indexed in Scilit:
- Scatter reduction with energy-weighted acquisitionIEEE Transactions on Nuclear Science, 1989