A comparison of deconvolution and windowed subtraction techniques for scatter compensation in SPECT

Author

Yanch, J.C. ; Flower, M.A. ; Webb, S.

Author_Institution

Dept. of Phys., Inst. of Cancer Res. & R. Marsden Hospital, Sutton, UK

Volume

7

Issue

1

fYear

1988

fDate

3/1/1988 12:00:00 AM

Firstpage

13

Lastpage

20

Abstract

Three procedures for the removal of Compton-scattered data in SPECT by constrained deconvolution are presented. The first is a deconvolution of a 2-D measured PSRF containing scatter from a single reconstructed transaxial image; the second is a deconvolution of a 2-D measured point-source response function (PSRF) from each frame of projection data prior to reconstruction; the third involves deconvolution of a 3-D measured PSRF from a stack of reconstructed slices. Results of applying these procedures to data obtained from a phantom containing cold cylinders and to data from a cold spot-resolution phantom are presented and are shown to be superior to the results of correcting for scatter by scatter-window substraction. Both 3-D deconvolution from reconstructed images and 2-D deconvolution from projection data show major improvements in image contrast, resolution, and quantitation. Improvements are especially marked for small (1.0-3.0 cm) cold sources

Keywords

Compton effect; computerised tomography; radioisotope scanning and imaging; Compton-scattered data; SPECT; deconvolution techniques; image contrast; image resolution; nuclear medicine; phantom; point-source response function; scatter compensation; single reconstructed transaxial image; windowed subtraction techniques; Deconvolution; Electromagnetic scattering; Equations; Frequency estimation; Image reconstruction; Image resolution; Imaging phantoms; Particle scattering; Single photon emission computed tomography; Subtraction techniques;

fLanguage

English

Journal_Title

Medical Imaging, IEEE Transactions on

Publisher

ieee

ISSN

0278-0062

Type

jour

DOI

10.1109/42.3924

Filename

3924