[1] Zhou Jian, Luo Limin, Zhu Hongqing,. Row-action SAGE algorithm for PET image reconstruction [J]. Journal of Southeast University (English Edition), 2004, 20 (4): 467-471. [doi:10.3969/j.issn.1003-7985.2004.04.015]

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Row-action SAGE algorithm for PET image reconstruction()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

20

Issue:

2004 4

Page:

467-471

Research Field:

Biological Science and Medical Engineering

Publishing date:

2004-12-30

Info

Title:

Row-action SAGE algorithm for PET image reconstruction

Author(s):

Zhou Jian;  Luo Limin;  Zhu Hongqing

Department of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China

Keywords:

positron emission tomography;  space-alternating;  generalized expectation-maximization;  row-action;  maximum likelihood

PACS:

R817

DOI:

10.3969/j.issn.1003-7985.2004.04.015

Abstract:

The one-block version of ordered subsets(OS)techniques is used to accelerate the convergent rate of the space-alternating generalized expectation-maximization(SAGE)algorithm. The new row-action SAGE(RA-SAGE)algorithm processes projections in sequentially orthogonal order which reduce the dependency among the projections and speeds up the convergences. Additionally, the over-relaxation parameter in the direction defined by the RA-SAGE algorithm is also applied to obtain fast convergence to a globally maximum likelihood(ML)solution. In experiments, the RA-SAGE algorithm and the classical SAGE algorithm are compared in the application to positron emission tomography(PET)image reconstruction. Simulation results show that RA-SAGE has better performance than SAGE in both convergence and image quality.

References:

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[2] Fessler J A, Hero A O. Space-alternating generalized expectation-maximization algorithm [J]. IEEE Trans Sig Proc, 1994, 42(10): 2664-2676.
[3] Fessler J A, Hero A O. Penalized maximum-likelihood image reconstruction using space-alternating generalized EM algorithms [J]. IEEE Trans Imag Proc, 1995, 4(10): 1417-1429.
[4] Hudson H M, Larkin R S. Accelerated image reconstruction using ordered subsets of projection data [J]. IEEE Trans Med Imag, 1994, 13(4): 601-609.
[5] Browne J, De Pierro A. A row-action alternative to the EM algorithm for maximizing likelihoods in emission tomography [J]. IEEE Trans Med Imag, 1996, 15(5): 687-699.
[6] Huaiqun G, Richard G. A projection access order for speedy convergence of ART(algebraic reconstruction technique): a multilevel scheme for computed tomography [J]. Physics in Medicine and Biology, 1994, 39: 2005-2022.
[7] Eiichi T, Hiroyuki K. Subset-dependent relaxation in block-iterative algorithm for image reconstruction in emission tomography [J]. Physics in Medicine and Biology, 2003, 48: 1405-1422.

Memo

Memo:

Biographies: Zhou Jian(1978—), male, graduate; Luo Limin(corresponding author), male, doctor, professor, luo.list@seu.edu.cn.

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