A fully threedimensional reconstruction algorithm with the nonstationary filter for improved singleorbit cone beam SPECT
Abstract
Conventional singleorbit cone beam tomography presents special problems. They include incomplete sampling and inadequate threedimensional (3D) reconstruction algorithm. The commonly used Feldkamp reconstruction algorithm simply extends the twodimensional (2D) fan beam algorithm to 3D cone beam geometry. A truly 3D reconstruction formulation has been derived for the singleorbit cone beam SPECT based on the 3D Fourier slice theorem. In the formulation, a nonstationary filter which depends on the distance from the central plane of the cone beam was derived. The filter is applied to the 2D projection data in directions along and normal to the axisofrotation. The 3D reconstruction algorithm with the nonstationary filter was evaluated using both computer simulation and experimental measurements. Significant improvement in image quality was demonstrated in terms of decreased artifacts and distortions in cone beam reconstructed images. However, compared with the Feldkamp algorithm, a fivefold increase in processing time is required. Further improvement in image quality needs complete sampling in frequency space.
 Authors:

 Univ. of North Carolina at Chapel Hill, NC (United States). Dept. of Biomedical Engineering and Dept. of Radiology
 Publication Date:
 OSTI Identifier:
 6447715
 Resource Type:
 Journal Article
 Journal Name:
 IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States)
 Additional Journal Information:
 Journal Volume: 40:3; Journal ID: ISSN 00189499
 Country of Publication:
 United States
 Language:
 English
 Subject:
 62 RADIOLOGY AND NUCLEAR MEDICINE; SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY; IMAGE PROCESSING; ALGORITHMS; BIOMEDICAL RADIOGRAPHY; COMPUTERIZED SIMULATION; DIGITAL FILTERS; EVALUATION; IMAGES; SAMPLING; COMPUTERIZED TOMOGRAPHY; DIAGNOSTIC TECHNIQUES; EMISSION COMPUTED TOMOGRAPHY; MATHEMATICAL LOGIC; MEDICINE; NUCLEAR MEDICINE; PROCESSING; RADIOLOGY; SIMULATION; TOMOGRAPHY; 550602*  Medicine External Radiation in Diagnostics (1980)
Citation Formats
Cao, Z J, and Tsui, B M. A fully threedimensional reconstruction algorithm with the nonstationary filter for improved singleorbit cone beam SPECT. United States: N. p., 1993.
Web. doi:10.1109/23.221052.
Cao, Z J, & Tsui, B M. A fully threedimensional reconstruction algorithm with the nonstationary filter for improved singleorbit cone beam SPECT. United States. https://doi.org/10.1109/23.221052
Cao, Z J, and Tsui, B M. 1993.
"A fully threedimensional reconstruction algorithm with the nonstationary filter for improved singleorbit cone beam SPECT". United States. https://doi.org/10.1109/23.221052.
@article{osti_6447715,
title = {A fully threedimensional reconstruction algorithm with the nonstationary filter for improved singleorbit cone beam SPECT},
author = {Cao, Z J and Tsui, B M},
abstractNote = {Conventional singleorbit cone beam tomography presents special problems. They include incomplete sampling and inadequate threedimensional (3D) reconstruction algorithm. The commonly used Feldkamp reconstruction algorithm simply extends the twodimensional (2D) fan beam algorithm to 3D cone beam geometry. A truly 3D reconstruction formulation has been derived for the singleorbit cone beam SPECT based on the 3D Fourier slice theorem. In the formulation, a nonstationary filter which depends on the distance from the central plane of the cone beam was derived. The filter is applied to the 2D projection data in directions along and normal to the axisofrotation. The 3D reconstruction algorithm with the nonstationary filter was evaluated using both computer simulation and experimental measurements. Significant improvement in image quality was demonstrated in terms of decreased artifacts and distortions in cone beam reconstructed images. However, compared with the Feldkamp algorithm, a fivefold increase in processing time is required. Further improvement in image quality needs complete sampling in frequency space.},
doi = {10.1109/23.221052},
url = {https://www.osti.gov/biblio/6447715},
journal = {IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States)},
issn = {00189499},
number = ,
volume = 40:3,
place = {United States},
year = {1993},
month = {6}
}