A scatter correction method for Tl-201 images: a Monte Carlo investigation

Author

Hademenos, George J. ; King, Michael A. ; Ljungberg, Michael ; Zubal, I. George ; Harrell, Charles R.

Author_Institution

Dept. of Nucl. Med., Massachusetts Univ. Med. Center, Worcester, MA, USA

fYear

1992

fDate

25-31 Oct 1992

Firstpage

1213

Abstract

Results from the application of a modified dual photopeak window (DPW) scatter correction method to Monte Carlo simulated Tl-201 emission images are presented. In the Monte Carlo investigation, individual simulations were performed for six radiation emissions of Tl-201. For each emission, point sources of Tl-201 were imaged at various locations in a water-filled elliptical tub phantom using three energy windows: two 12% windows abutted at 72 keV and a third 10 keV window placed to the right of the photopeak window. The third window was used to estimate the spilldown contribution from the Tl-201 gamma rays in each of the two photopeak windows. Using the corrected counts in these two windows, the DPW method was applied to each point source image to estimate the scatter distribution. Application of this modified version of DPW resulted in an approximately six-fold reduction in the scatter fraction and an excellent agreement of the shape of the tails between the estimated scatter distribution and the truth

Keywords

Monte Carlo methods; gamma-ray scattering; medical image processing; radioisotope scanning and imaging; 10 keV; 72 keV; ²⁰¹Tl; ²⁰¹Tl gamma rays; Monte Carlo simulated ²⁰¹Tl emission images; dual photopeak window method; energy window; medical diagnostic imaging; nuclear medicine; scatter correction method; water-filled elliptical tub phantom; Biomedical imaging; Cancer; Gamma rays; Lakes; Medical diagnostic imaging; Medical simulation; Monte Carlo methods; Nuclear medicine; X-ray imaging; X-ray scattering;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/NSSMIC.1992.301481

Filename

301481