Image Reconstruction of Transmission Tomography for Modified Penalized EM Gradient ( PEMG-1 ) Algorithm


The KIPS Transactions:PartB , Vol. 8, No. 2, pp. 173-182, Apr. 2001
10.3745/KIPSTB.2001.8.2.173,   PDF Download:

Abstract

In this paper, we suggest method for solving the problem which is occured in the case of using EM algorithm to estimate the transimission tomography image reconstruction. In case of estimation of high-dimension parameter such as tomography image reconstruction, dimension of this inverse matrix is so high a grade that it is almost impossible to calculate it. To resolve this problem, we suggest a modified penalized EM gradient algorithm, say PEMG-1. This algorithm is a gradient-typed EM algorithm with a penalty function and its solution can be easily found even though either the EM gradient algorithm of Lange (1995) or the OSL algorithm of Green (1990) are not available.


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Cite this article
[IEEE Style]
M. K. Song and J. K. Park, "Image Reconstruction of Transmission Tomography for Modified Penalized EM Gradient ( PEMG-1 ) Algorithm," The KIPS Transactions:PartB , vol. 8, no. 2, pp. 173-182, 2001. DOI: 10.3745/KIPSTB.2001.8.2.173.

[ACM Style]
Min Koo Song and Jeong Ki Park. 2001. Image Reconstruction of Transmission Tomography for Modified Penalized EM Gradient ( PEMG-1 ) Algorithm. The KIPS Transactions:PartB , 8, 2, (2001), 173-182. DOI: 10.3745/KIPSTB.2001.8.2.173.