Title :
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
fDate :
8/1/2000 12:00:00 AM
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;
Journal_Title :
Nuclear Science, IEEE Transactions on
