A fast algorithm for computer aided collimation gamma camera (CACAO)

Author

Jeanguillaume, C. ; Begot, S. ; Quartuccio, M. ; Douiri, A. ; Franck, D. ; Pihet, P. ; Ballongue, P.

Author_Institution

Faculte des Sci. d´´Orsay, France

Volume

47

Issue

4

fYear

2000

fDate

8/1/2000 12:00:00 AM

Firstpage

1541

Lastpage

1542

Abstract

The computer aided collimation gamma camera is aimed at breaking down the resolution sensitivity trade-off of the conventional parallel hole collimator. It uses larger and longer holes, having an added linear movement at the acquisition sequence. A dedicated algorithm including shift and sum, deconvolution, parabolic filtering and rotation is described. Examples of reconstruction are given. This work shows that a simple and fast algorithm, based on a diagonal dominant approximation of the problem can be derived. Its gives a practical solution to the CACAO reconstruction problem

Keywords

biomedical equipment; cameras; computerised instrumentation; gamma-ray detection; image reconstruction; image resolution; medical image processing; radioisotope imaging; acquisition sequence linear movement; computer aided collimation gamma camera; dedicated algorithm; diagonal dominant approximation; fast algorithm; medical diagnostic imaging; medical instrumentation; nuclear medicine; parabolic filtering; reconstruction problem; Cameras; Computational modeling; Deconvolution; Filtering algorithms; Image reconstruction; Iterative algorithms; Lubricating oils; Optical collimators; Petroleum; Single photon emission computed tomography;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.873013

Filename

873013