A fully three-dimensional reconstruction algorithm with the nonstationary filter for improved single-orbit cone beam SPECT

Conventional single-orbit cone beam tomography suffers from incomplete sampling and an inadequate three-dimensional (3D) reconstruction algorithm. The commonly used Feldkamp reconstruction algorithm simply extends the two-dimensional (2D) fan beam algorithm to 3D cone beam geometry. A truly 3D recon...

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Bibliographic Details
Published in:IEEE transactions on nuclear science Vol. 40; no. 3; pp. 280 - 287
Main Authors: Cao, Z.J., Tsui, B.M.W.
Format: Journal Article
Language:English
Published: New York, NY IEEE 01.06.1993
Institute of Electrical and Electronics Engineers
Subjects:
550602 - Medicine- External Radiation in Diagnostics- (1980-)
ALGORITHMS
Biological and medical sciences
BIOMEDICAL RADIOGRAPHY
Collimators
COMPUTERIZED SIMULATION
COMPUTERIZED TOMOGRAPHY
DIAGNOSTIC TECHNIQUES
DIGITAL FILTERS
EMISSION COMPUTED TOMOGRAPHY
EVALUATION
Filters
Frequency
Geometry
IMAGE PROCESSING
Image quality
Image reconstruction
Image sampling
Investigative techniques, diagnostic techniques (general aspects)
MATHEMATICAL LOGIC
Medical sciences
MEDICINE
Miscellaneous. Technology
NUCLEAR MEDICINE
PROCESSING
RADIOLOGY
RADIOLOGY AND NUCLEAR MEDICINE
Radionuclide investigations
Reconstruction algorithms
SAMPLING
Sampling methods
SIMULATION
SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY
TOMOGRAPHY
Radionuclide study
Test objet
Computer simulation
Image processing
Filter
Three dimensional space
Experimental study
Algorithm
Photon
Positron emission tomography
Image reconstruction
Biomedical engineering
ISSN:0018-9499, 1558-1578
Online Access:Get full text
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Description
Summary:Conventional single-orbit cone beam tomography suffers from incomplete sampling and an inadequate three-dimensional (3D) reconstruction algorithm. The commonly used Feldkamp reconstruction algorithm simply extends the two-dimensional (2D) fan beam algorithm to 3D cone beam geometry. A truly 3D reconstruction formulation based on the 3D Fourier slice theorem is derived for a single-orbit cone beam SPECT. In the formulation, a nonstationary filter which depends on the distance from the central plane of the cone beam is derived and applied to the 2D projection data in directions along and normal to the axis of rotation. This algorithm 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.< >
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content type line 23
ISSN:0018-9499
1558-1578
DOI:10.1109/23.221052