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Implementation of an accelerated iterative algorithm for cone-beam SPECT.

Publication ,  Journal Article
Li, J; Jaszczak, RJ; Greer, KL; Coleman, RE
Published in: Phys Med Biol
March 1994

In this paper we describe the implementation of an accelerated iterative reconstruction algorithm (AIRA) for cone-beam (CB) projections using a single circular orbit in single-photon-emission computed tomography (SPECT). This algorithm is a modified maximum-likelihood-expectation-maximization (ML-EM) algorithm and several approaches have been used to accelerate the reconstruction process. These approaches include: (i) the use of ordered subsets; (ii) the use of active areas and volumes; and (iii) the storing in memory of the transition vector for a given ray (during the forward projection step). This algorithm, which compensates for collimator geometric sensitivity variation as a function of position and makes uniform attenuation corrections has been evaluated using experimentally acquired phantom data. The results demonstrate a two-orders-of-magnitude decrease of the computational time of this algorithm over the conventional ML-EM algorithm with similar convergence properties.

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Published In

Phys Med Biol

DOI

ISSN

0031-9155

Publication Date

March 1994

Volume

39

Issue

3

Start / End Page

643 / 653

Location

England

Related Subject Headings

  • Tomography, Emission-Computed, Single-Photon
  • Software
  • Sensitivity and Specificity
  • Photons
  • Phantoms, Imaging
  • Nuclear Medicine & Medical Imaging
  • Models, Statistical
  • Likelihood Functions
  • Image Processing, Computer-Assisted
  • Humans
 

Citation

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Li, J., Jaszczak, R. J., Greer, K. L., & Coleman, R. E. (1994). Implementation of an accelerated iterative algorithm for cone-beam SPECT. Phys Med Biol, 39(3), 643–653. https://doi.org/10.1088/0031-9155/39/3/025
Li, J., R. J. Jaszczak, K. L. Greer, and R. E. Coleman. “Implementation of an accelerated iterative algorithm for cone-beam SPECT.Phys Med Biol 39, no. 3 (March 1994): 643–53. https://doi.org/10.1088/0031-9155/39/3/025.
Li J, Jaszczak RJ, Greer KL, Coleman RE. Implementation of an accelerated iterative algorithm for cone-beam SPECT. Phys Med Biol. 1994 Mar;39(3):643–53.
Li, J., et al. “Implementation of an accelerated iterative algorithm for cone-beam SPECT.Phys Med Biol, vol. 39, no. 3, Mar. 1994, pp. 643–53. Pubmed, doi:10.1088/0031-9155/39/3/025.
Li J, Jaszczak RJ, Greer KL, Coleman RE. Implementation of an accelerated iterative algorithm for cone-beam SPECT. Phys Med Biol. 1994 Mar;39(3):643–653.
Journal cover image

Published In

Phys Med Biol

DOI

ISSN

0031-9155

Publication Date

March 1994

Volume

39

Issue

3

Start / End Page

643 / 653

Location

England

Related Subject Headings

  • Tomography, Emission-Computed, Single-Photon
  • Software
  • Sensitivity and Specificity
  • Photons
  • Phantoms, Imaging
  • Nuclear Medicine & Medical Imaging
  • Models, Statistical
  • Likelihood Functions
  • Image Processing, Computer-Assisted
  • Humans