Title :
Using list-mode data to compare scatter corrections in I-131 imaging
Author :
Pollard, Kenneth R. ; Bice, Alden N. ; Durack, Lawrence D. ; Lewellen, Thomas K. ; Miyaoka, Robert S. ; Kohlmyer, Steven G.
Author_Institution :
Dept. of Radiol., Washington Univ. Med. Center, Seattle, WA, USA
Abstract :
Gamma camera imaging of I-131 suffers from detection of Compton-scattered events. Many different methods of scatter correction have been proposed for lower-energy radionuclide (e.g., Tc-99m) imaging. Extension of these scatter corrections to I-131 imaging is not obvious and may not be simple, because a significant fraction of the detected scatter is due to gamma rays that have scattered in the camera-head. The authors acquired list-mode data (x, y and E) from a digital gamma camera and rebinned it in different ways to compare five different scatter-correction techniques: lower-window subtraction, upper-window subtraction, upper and lower window subtraction, linear dual photopeak, and nonlinear dual photopeak. A lower, Compton-window subtraction appears most stable, and perhaps best
Keywords :
gamma-ray detection and measurement; iodine; radioisotope scanning and imaging; radioisotopes; 131I; Compton-scattered events; Compton-window subtraction; camera-head; digital gamma camera; gamma camera imaging; linear dual photopeak; list-mode data; lower-window subtraction; nonlinear dual photopeak; radionuclide imaging; scatter-correction techniques; upper-window subtraction; Attenuation; Biomedical imaging; Cameras; Gamma ray detection; Gamma ray detectors; Gamma rays; Imaging phantoms; Optical imaging; Radiology; Scattering;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1992., Conference Record of the 1992 IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-0884-0
DOI :
10.1109/NSSMIC.1992.301065
