A deconvolution scatter correction for a 3-D PET system

Author

McKee, B.T.A. ; Gurvey, A.T. ; Harvey, P.J. ; Howse, D.C.

Author_Institution

Queen´´s Univ., Kingston, Ont., Canada

Volume

11

Issue

4

fYear

1992

fDate

12/1/1992 12:00:00 AM

Firstpage

560

Lastpage

569

Abstract

A method to remove the scattered background from a reconstructed image by deconvolution with a point response function which includes the scatter contribution is presented. The amplitude of the scattered response function is obtained by constraining a region of the corrected image to zero average amplitude. This method assumes that the shape of scatter distribution is shift invariant and independent of the shape of the scattering object and the distribution of the positron activity. The validity of these approximations for the QPET geometry was tested using simulations. An average scatter response function for the system was obtained from these simulations and compared with results from measurements. The method was tested using experimental data from an irregularly shaped acrylic phantom. It was simple to implement and resulted in a satisfactory correction of the scattered background for a small-volume system

Keywords

computerised tomography; medical image processing; radioisotope scanning and imaging; 3D PET system; deconvolution scatter correction; irregularly shaped acrylic phantom; medical diagnostic imaging; nuclear medicine; point response function; positron activity distribution; positron emission tomography; scattered background removal; scattered response function; simulations; small-volume system; Deconvolution; Detectors; Electromagnetic scattering; Geometry; High-resolution imaging; Image reconstruction; Particle scattering; Positron emission tomography; Shape; Testing;

fLanguage

English

Journal_Title

Medical Imaging, IEEE Transactions on

Publisher

ieee

ISSN

0278-0062

Type

jour

DOI

10.1109/42.192692

Filename

192692