A filtered-backprojection algorithm for astigmatic SPECT reconstruction

Author

Wang, Huili ; Jaszczak, Ronald J. ; Coleman, R. Edward

Author_Institution

Duke Univ. Med. Center, Durham, NC, USA

Volume

4

fYear

1994

fDate

30 Oct-5 Nov 1994

Firstpage

1925

Abstract

A filtered backprojection algorithm is presented for astigmatic collimation. The reconstruction algorithm is derived based on the image reconstruction algorithm derived by Feldkamp et al. (see J. Opt. Soc. A, vol. 1, p. 612-19, 1984) for cone beam collimation. The derived algorithm is validated based on Monte Carlo simulated data. Using the astigmatic reconstruction algorithm, the authors demonstrate the capability of astigmatic collimation to balance the trade-off among axial blurring, field-of-view, and collimator sensitivity for selecting a convergent beam collimation. Reconstructed images also demonstrate that astigmatic collimation can provide improved axial blurring with increased collimator sensitivity compared to cone beam collimation

Keywords

Monte Carlo methods; image reconstruction; medical image processing; single photon emission computed tomography; Monte Carlo simulated data; astigmatic SPECT reconstruction; astigmatic collimation; axial blurring; collimator sensitivity; cone beam collimation; convergent beam collimation; field-of-view; filtered-backprojection algorithm; medical diagnostic imaging; nuclear medicine; Biomedical imaging; Cancer; Collimators; Focusing; Geometry; Image converters; Image reconstruction; Monte Carlo methods; Radiology; Reconstruction algorithms;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium and Medical Imaging Conference, 1994., 1994 IEEE Conference Record

Conference_Location

Norfolk, VA

Print_ISBN

0-7803-2544-3

Type

conf

DOI

10.1109/NSSMIC.1994.474690

Filename

474690