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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editor: Gregory W. Faris
  • Vol. 2, Iss. 5 — May. 17, 2007

Median-prior tomography reconstruction combined with nonlinear anisotropic diffusion filtering

Jianhua Yan and Jun Yu  »View Author Affiliations

JOSA A, Vol. 24, Issue 4, pp. 1026-1033 (2007)

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Positron emission tomography (PET) is becoming increasingly important in the fields of medicine and biology. Penalized iterative algorithms based on maximum a posteriori (MAP) estimation for image reconstruction in emission tomography place conditions on which types of images are accepted as solutions. The recently introduced median root prior (MRP) favors locally monotonic images. MRP can preserve sharp edges, but a steplike streaking effect and much noise are still observed in the reconstructed image, both of which are undesirable. An MRP tomography reconstruction combined with nonlinear anisotropic diffusion interfiltering is proposed for removing noise and preserving edges. Analysis shows that the proposed algorithm is capable of producing better reconstructed images compared with those reconstructed by conventional maximum-likelihood expectation maximization (MLEM), MAP, and MRP-based algorithms in PET image reconstruction.

© 2007 Optical Society of America

OCIS Codes
(100.3010) Image processing : Image reconstruction techniques
(110.6960) Imaging systems : Tomography
(170.3880) Medical optics and biotechnology : Medical and biological imaging

ToC Category:
Medical Optics and Biotechnology

Original Manuscript: January 27, 2006
Revised Manuscript: September 28, 2006
Manuscript Accepted: October 17, 2006
Published: March 14, 2007

Virtual Issues
Vol. 2, Iss. 5 Virtual Journal for Biomedical Optics

Jianhua Yan and Jun Yu, "Median-prior tomography reconstruction combined with nonlinear anisotropic diffusion filtering," J. Opt. Soc. Am. A 24, 1026-1033 (2007)

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