Accelerated MAP reconstructions using an accelerated factor

Yu Jung Tsai*, Ing Tsung Hsiao

*此作品的通信作者

研究成果: 圖書/報告稿件的類型會議稿件同行評審

1 引文 斯高帕斯(Scopus)

摘要

In emission tomography, statistical reconstruction has been proved outperforming FBP (filtered backprojection) [1]. ML-EM (maximum likelihood expectation-maximization) [2] algorithm is one of the most widely used statistical reconstruction methods. Although with good image quality, the ML-EM algorithm is challenged by its slow convergence speed and ill-condition problem. To solve for the problems, based on the ideas from the accelerated EM (AEM) [3] and maximum a posteriori EM (MAP-EM) [4] algorithms, we derived two approaches (MAP-AEM1 and MAP-AEM2) in this study to accelerate MAP reconstruction using a bigger step size instead of ordered subsets. The results were compared with ordered-subset methods of both BSREM and MAPCOSEM. From the preliminary results, our methods showed the speedup ability for the traditional MAP-EM.

原文英語
主出版物標題IEEE Nuclear Science Symposuim and Medical Imaging Conference, NSS/MIC 2010
頁面3278-3281
頁數4
DOIs
出版狀態已出版 - 2010
對外發佈
事件2010 IEEE Nuclear Science Symposium, Medical Imaging Conference, NSS/MIC 2010 and 17th International Workshop on Room-Temperature Semiconductor X-ray and Gamma-ray Detectors, RTSD 2010 - Knoxville, TN, 美國
持續時間: 30 10 201006 11 2010

出版系列

名字IEEE Nuclear Science Symposium Conference Record
ISSN(列印)1095-7863

Conference

Conference2010 IEEE Nuclear Science Symposium, Medical Imaging Conference, NSS/MIC 2010 and 17th International Workshop on Room-Temperature Semiconductor X-ray and Gamma-ray Detectors, RTSD 2010
國家/地區美國
城市Knoxville, TN
期間30/10/1006/11/10

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