May 2000 · Volume 19, Issue 5 · Vol. 19 · Issue 5 · DOI 10.1109/42.870265
G.L. Zeng, G.T. Gullberg
Abstract / 摘要
EnglishComputational burden is a major concern when an iterative algorithm is used to reconstruct a three-dimensional (3-D) image with attenuation, detector response, and scatter corrections. Most of the computation time is spent executing the projector and backprojector of an iterative algorithm. Usually, the projector and the backprojector are transposed operators of each other. The projector should mo...
Author Info / 作者信息
G.L. Zeng
Affiliation not provided by IEEE Xplore
机构中文翻译待生成或 IEEE 未提供机构
G.T. Gullberg
Affiliation not provided by IEEE Xplore
机构中文翻译待生成或 IEEE 未提供机构
Translation pending
Article 870265
May 2000 · Volume 19, Issue 5 · Vol. 19 · Issue 5 · DOI 10.1109/42.870259
Jinyi Qi, R.M. Leahy
Abstract / 摘要
EnglishDerives approximate analytical expressions for the local impulse response and covariance of images reconstructed from fully three-dimensional (3-D) positron emission tomography (PET) data using maximum a posteriori (MAP) estimation. These expressions explicitly account for the spatially variant detector response and sensitivity of a 3-D tomograph. The resulting spatially variant impulse response a...
Author Info / 作者信息
Jinyi Qi
Affiliation not provided by IEEE Xplore
机构中文翻译待生成或 IEEE 未提供机构
R.M. Leahy
Affiliation not provided by IEEE Xplore
机构中文翻译待生成或 IEEE 未提供机构
Translation pending
Article 870259