Title :
A Monte Carlo investigation of the dual photopeak window scatter correction method (SPECT)
Author :
Hademenos, George J. ; Ljungberg, Michael ; King, Michael A. ; Glick, Stephen J.
Author_Institution :
Dept. of Nucl. Med., Massachusetts Univ. Med. Center, Worcester, MA, USA
Abstract :
Results from a Monte Carlo investigation of the dual photopeak window (DPW) scatter correction method are presented for point and extended sources of Tc-99m in both homogeneous and nonhomogeneous attenuating media. The DPW method uses the ratio of counts in two nonoverlapping energy windows within the photopeak region as input to a regression relation. A pixel-by-pixel estimate of the scatter in the summed windows is obtained and subtracted to yield an estimate of the primary. An approximately tenfold decrease in the scatter fraction and an excellent agreement with the shape of the true scatter distribution were observed.<>
Keywords :
Monte Carlo methods; computerised tomography; gamma-ray scattering; radioisotope scanning and imaging; /sup 99m/Tc; Monte Carlo investigation; dual photopeak window scatter correction method; extended source; homogeneous attenuating media; medical diagnostic imaging; nonhomogeneous attenuating media; nonoverlapping energy windows; nuclear medicine; point source; regression relation; scatter fraction; summed windows; Biomedical imaging; Cancer; Electromagnetic scattering; Energy resolution; Monte Carlo methods; Nuclear medicine; Particle scattering; Photonic crystals; Single photon emission computed tomography; Yield estimation;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1991., Conference Record of the 1991 IEEE
Conference_Location :
Santa Fe, NM, USA
Print_ISBN :
0-7803-0513-2
DOI :
10.1109/NSSMIC.1991.259227
