skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Two-dimensional restoration of single photon emission computed tomography images using the Kalman filter

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 of the filtered backprojection process can cause the modulation transfer function (MTF) of the SPECT imaging system to be anisotropic and nonstationary, especially near the edges of the camera's field of view. The use of shift-invariant restoration techniques fails to restore large images because these techniques do not account for such variations in the MTF. This study presents the application of a two-dimensional (2-D) shift-variant Kalman filter for post-reconstruction restoration of SPECT slices. This filter was applied to SPECT images of a hollow cylinder phantom; a resolution phantom; and a large, truncated cone phantom containing two types of cold spots, a sphere, and a triangular prism. The images were acquired on an ADAC GENESYS camera. A comparison was performed between results obtained by the Kalman filter and those obtained by shift-invariant filters. Quantitative analysis of the restored images performed through measurement of root mean squared errors shows a considerable reduction in error of Kalman-filtered images over images restored using shift-invariant methods.

Authors:
; ;  [1]; ;  [2]
  1. (Univ. of Calgary, Alberta (Canada). Dept. of Electrical and Computer Engineering)
  2. (Foothills Hospital, Calgary, Alberta (Canada). Div. of Nuclear Medicine)
Publication Date:
OSTI Identifier:
7144994
Resource Type:
Journal Article
Journal Name:
IEEE Transactions on Medical Imaging (Institute of Electrical and Electronics Engineers); (United States)
Additional Journal Information:
Journal Volume: 13:1; Journal ID: ISSN 0278-0062
Country of Publication:
United States
Language:
English
Subject:
62 RADIOLOGY AND NUCLEAR MEDICINE; SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY; ACCURACY; IMAGE PROCESSING; PERFORMANCE; QUALITY CONTROL; COMPUTERIZED TOMOGRAPHY; CONTROL; DIAGNOSTIC TECHNIQUES; EMISSION COMPUTED TOMOGRAPHY; PROCESSING; TOMOGRAPHY; 550601* - Medicine- Unsealed Radionuclides in Diagnostics

Citation Formats

Boulfelfel, D., Rangayyan, R.M., Kuduvalli, G.R., Hahn, L.J., and Kloiber, R. Two-dimensional restoration of single photon emission computed tomography images using the Kalman filter. United States: N. p., 1994. Web. doi:10.1109/42.276148.
Boulfelfel, D., Rangayyan, R.M., Kuduvalli, G.R., Hahn, L.J., & Kloiber, R. Two-dimensional restoration of single photon emission computed tomography images using the Kalman filter. United States. doi:10.1109/42.276148.
Boulfelfel, D., Rangayyan, R.M., Kuduvalli, G.R., Hahn, L.J., and Kloiber, R. Tue . "Two-dimensional restoration of single photon emission computed tomography images using the Kalman filter". United States. doi:10.1109/42.276148.
@article{osti_7144994,
title = {Two-dimensional restoration of single photon emission computed tomography images using the Kalman filter},
author = {Boulfelfel, D. and Rangayyan, R.M. and Kuduvalli, G.R. and Hahn, L.J. and Kloiber, R.},
abstractNote = {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 of the filtered backprojection process can cause the modulation transfer function (MTF) of the SPECT imaging system to be anisotropic and nonstationary, especially near the edges of the camera's field of view. The use of shift-invariant restoration techniques fails to restore large images because these techniques do not account for such variations in the MTF. This study presents the application of a two-dimensional (2-D) shift-variant Kalman filter for post-reconstruction restoration of SPECT slices. This filter was applied to SPECT images of a hollow cylinder phantom; a resolution phantom; and a large, truncated cone phantom containing two types of cold spots, a sphere, and a triangular prism. The images were acquired on an ADAC GENESYS camera. A comparison was performed between results obtained by the Kalman filter and those obtained by shift-invariant filters. Quantitative analysis of the restored images performed through measurement of root mean squared errors shows a considerable reduction in error of Kalman-filtered images over images restored using shift-invariant methods.},
doi = {10.1109/42.276148},
journal = {IEEE Transactions on Medical Imaging (Institute of Electrical and Electronics Engineers); (United States)},
issn = {0278-0062},
number = ,
volume = 13:1,
place = {United States},
year = {1994},
month = {3}
}