Title :
Kalman restoration of SPECT images
Author :
Boulfelfel, D. ; Rangayyan, R.M. ; Hahn, L.J. ; Kloiber, R. ; Kuduvalli, G.
Author_Institution :
Department of Electrical and Computer Engineering, University of Calgary, Calgary, Alberta, Canada T2N 1N4
fDate :
Oct. 29 1992-Nov. 1 1992
Abstract :
The discrete filtered backprojection (DFBP) algorithm used for the reconstruction of single photon emission computed tomography (SPECT) images affects image quality because of the operations of filtering and discretization. The discretization can cause the modulation transfer function (MTF) of the SPECT images to be anisotropic and nonstationary. This study presents the application of a two-dimensional (2-D) shift-variant Kalman filter for restoring SPECT images. Quantitative analysis of the restored images performed through measurement of root mean squared (RMS) errors shows a considerable reduction in error of Kalman-filtered images over images restored using shift-invariant methods.
Keywords :
Collimators; Computational modeling; Image restoration; Kalman filters;
Conference_Titel :
Engineering in Medicine and Biology Society, 1992 14th Annual International Conference of the IEEE
Conference_Location :
Paris, France
Print_ISBN :
0-7803-0785-2
Electronic_ISBN :
0-7803-0816-6
DOI :
10.1109/IEMBS.1992.5762076
