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

fYear

1991

fDate

2-9 Nov. 1991

Firstpage

1814

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/NSSMIC.1991.259227

Filename

259227