[1] Zhu Hongqing, Shu Huazhong, Zhou Jian, Luo Limin, et al. Accelerating SAGE algorithm in PET image reconstructionby rescaled block-iterative method [J]. Journal of Southeast University (English Edition), 2005, 21 (2): 207-210. [doi:10.3969/j.issn.1003-7985.2005.02.018]

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Accelerating SAGE algorithm in PET image reconstructionby rescaled block-iterative method()

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

Volumn:

21

Issue:

2005 2

Page:

207-210

Research Field:

Biological Science and Medical Engineering

Publishing date:

2005-06-30

Info

Title:

Accelerating SAGE algorithm in PET image reconstructionby rescaled block-iterative method

Author(s):

Zhu Hongqing;  Shu Huazhong;  Zhou Jian;  Luo Limin

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

Keywords:

positron emission tomography;  space-alternating generalized expectation-maximization;  image reconstruction;  rescaled block-iterative;  maximum likelihood

PACS:

R817

DOI:

10.3969/j.issn.1003-7985.2005.02.018

Abstract:

A new method to accelerate the convergent rate of the space-alternating generalized expectation-maximization(SAGE)algorithm is proposed.The new rescaled block-iterative SAGE(RBI-SAGE)algorithm combines the RBI algorithm with the SAGE algorithm for PET image reconstruction.In the new approach, the projection data is partitioned into disjoint blocks;each iteration step involves only one of these blocks.SAGE updates the parameters sequentially in each block.In experiments, the RBI-SAGE algorithm and classical SAGE algorithm are compared in the application on positron emission tomography(PET)image reconstruction.Simulation results show that RBI-SAGE has better performance than SAGE in both convergence and image quality.

References:

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[8] Fessler J A, Hero A O.New complete-data spaces and faster algorithms for penalized-likelihood emission tomography [A].In:Proceedings of IEEE Conference on Nuclear Science Symposium and Medical Imaging [C].Virginia, 1994.1897-1901.
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Memo

Memo:

Biographies: Zhu Hongqing(1967—), female, doctor;Shu Huazhong(corresponding author), male, professor, shu.list@seu.edu.cn.

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