Exact fan-beam and 4{pi}-acquisition cone-beam SPECT algorithms with uniform attenuation correction
- Department of Physics, University of Utah, Salt Lake City, Utah 84112 (United States)
This paper presents analytical fan-beam and cone-beam reconstruction algorithms that compensate for uniform attenuation in single photon emission computed tomography. First, a fan-beam algorithm is developed by obtaining a relationship between the two-dimensional (2D) Fourier transform of parallel-beam projections and fan-beam projections. Using this relationship, 2D Fourier transforms of equivalent parallel-beam projection data are obtained from the fan-beam projection data. Then a quasioptimal analytical reconstruction algorithm for uniformly attenuated Radon data, developed by Metz and Pan, is used to reconstruct the image. A cone-beam algorithm is developed by extending the fan-beam algorithm to 4{pi} solid angle geometry. The cone-beam algorithm is also an exact algorithm.
- OSTI ID:
- 20726908
- Journal Information:
- Medical Physics, Journal Name: Medical Physics Journal Issue: 11 Vol. 32; ISSN 0094-2405; ISSN MPHYA6
- Country of Publication:
- United States
- Language:
- English
Similar Records
Analytical fan-beam and cone-beam reconstruction algorithms withuniform attenuation correction for SPECT
An FDK-like cone-beam SPECT reconstruction algorithm fornon-uniform attenuated projections acquired using a circulartrajectory