Volume 6, Issue 3
3 articles collected from IEEE Xplore web pages.
Earlier collected articles较早收录文章
Sept. 1987 · Volume 6, Issue 3 · Vol. 6 · Issue 3 · DOI 10.1109/TMI.1987.4307826
Emanuel Levitan, Gabor T. Herman
Abstract / 摘要
EnglishThe expectation maximization method for maximum likelihood image reconstruction in emission tomography, based on the Poisson distribution of the statistically independent components of the image and measurement vectors, is extended to a maximum aposteriori image reconstruction using a multivariate Gaussian a priori probability distribution of the image vector. The approach is equivalent to a penal...
Author Info / 作者信息
Emanuel Levitan
Affiliation not provided by IEEE Xplore
机构中文翻译待生成或 IEEE 未提供机构
Gabor T. Herman
Affiliation not provided by IEEE Xplore
机构中文翻译待生成或 IEEE 未提供机构
Translation: pending
AI: pending
Article 4307826
Sept. 1987 · Volume 6, Issue 3 · Vol. 6 · Issue 3 · DOI 10.1109/TMI.1987.4307831
Donald L. Snyder, Michael I. Miller, Lewis J. Thomas, David G. Politte
Abstract / 摘要
EnglishImages produced in emission tomography with the expectation-maximization algorithm have been observed to become more noisy and to have large distortions near edges as iterations proceed and the images converge towards the maximum-likelihood estimate. It is our conclusion that these artifacts are fundamental to reconstructions based on maximum-likelihood estimation as it has been applied usually; t...
Author Info / 作者信息
Donald L. Snyder
Affiliation not provided by IEEE Xplore
机构中文翻译待生成或 IEEE 未提供机构
Michael I. Miller
Affiliation not provided by IEEE Xplore
机构中文翻译待生成或 IEEE 未提供机构
Lewis J. Thomas
Affiliation not provided by IEEE Xplore
机构中文翻译待生成或 IEEE 未提供机构
David G. Politte
Affiliation not provided by IEEE Xplore
机构中文翻译待生成或 IEEE 未提供机构
Translation: pending
AI: pending
Article 4307831
Sept. 1987 · Volume 6, Issue 3 · Vol. 6 · Issue 3 · DOI 10.1109/TMI.1987.4307832
J. G. Rogers, R. Harrop, P. E. Kinahan
Abstract / 摘要
EnglishA review is made of selected recent publications on three-dimensional image reconstruction for PET. A new algorithm is proposed which is designed to fully utilize all emitted gamma rays which can be detected in a truncated spherical detector. By such full utilization of emitted rays the new algorithm should produce images of better statistical accuracy than could be produced by previously known al...
Author Info / 作者信息
J. G. Rogers
Affiliation not provided by IEEE Xplore
机构中文翻译待生成或 IEEE 未提供机构
R. Harrop
Affiliation not provided by IEEE Xplore
机构中文翻译待生成或 IEEE 未提供机构
P. E. Kinahan
Affiliation not provided by IEEE Xplore
机构中文翻译待生成或 IEEE 未提供机构
Translation: pending
AI: pending
Article 4307832