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
fDate :
4/1/1993 12:00:00 AM
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 approximate tenfold decrease in the scatter fraction and an excellent agreement with the shape of the true scatter distribution were observed
Keywords :
computerised tomography; radioactive sources; radioisotope scanning and imaging; radioisotopes; technetium; 99mTc source; Monte Carlo; SPECT imaging; diagnostic nuclear medicine; dual photopeak window scatter correction method; extended sources; homogeneous attenuating media; nonhomogeneous attenuating media; point source; primary; scatter distribution; scatter fraction; Biomedical imaging; Cancer; Electromagnetic scattering; Energy resolution; Monte Carlo methods; Nonhomogeneous media; Particle scattering; Photonic crystals; Single photon emission computed tomography; Yield estimation;
Journal_Title :
Nuclear Science, IEEE Transactions on
