Constrained Fourier space method for compensation of missing data in emission computed tomography

Author

Karp, Joel S. ; Muehllehner, Gerd ; Lewitt, Robert M.

Author_Institution

Dept. of Radiol., Hospital of the Univ. of Pennsylvania, Philadelphia, PA, USA

Volume

7

Issue

1

fYear

1988

fDate

3/1/1988 12:00:00 AM

Firstpage

21

Lastpage

25

Abstract

A method is introduced to compensate for missing projection data that can result from gas between detectors or from malfunctioning detectors. This method uses constraints in the Fourier domain to estimate the missing data, thus completing the data set so that the filtered backprojection algorithm can be used to reconstruct artifact-free images. The image reconstructed from estimates using this technique and a data set with gaps is nearly indistinguishable from an image reconstructed from a complete data set without gaps, using a simulated brain phantom

Keywords

computerised tomography; radioisotope scanning and imaging; artifact-free images reconstruction; constrained Fourier space method; emission computed tomography; filtered backprojection algorithm; malfunctioning detectors; medical diagnostic images; missing data compensation; nuclear medicine; simulated brain phantom; Brain modeling; Computational modeling; Computed tomography; Gamma ray detection; Gamma ray detectors; Image reconstruction; Imaging phantoms; Iterative algorithms; Motion detection; Sampling methods;

fLanguage

English

Journal_Title

Medical Imaging, IEEE Transactions on

Publisher

ieee

ISSN

0278-0062

Type

jour

DOI

10.1109/42.3925

Filename

3925