Spatially Variant Positron Range Modeling Derived from CT for PET Image Reconstruction.
Spatially Variant Positron Range Modeling Derived from CT for PET Image Reconstruction.
复制标题
用于 PET 图像重建的 CT 空间变异正电子范围建模。
DOI:
10.1109/nssmic.2008.4774106
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发表时间:
2008
期刊:
影响因子:
--
通讯作者:
MacDonald,Lawrence
中科院分区:
文献类型:
--
作者:
Alessio,Adam;MacDonald,Lawrence
The influence of a finite positron annihilation distance represents a fundamental limit to the spatial resolution of PET scanners. It is appreciated that this effect is a minor concern in whole-body F18 imaging, but it does represent an issue when imaging with higher energy isotopes such as N13 or Rb82. This effect is especially relevant for imaging tasks along tissue gradients such as the cardiac/lung boundary and diaphragm/lung boundary. This work presents a method to determine the positron range effect from a CT scan and to model this effect as shift-variant, anisotropic kernels. The positron annihilation distance across boundaries of tissues is represented with a simple model, which can be quickly derived from CT scans and applied in the reconstruction of PET images. The positron range compensation map is applied in a modified OSEM algorithm to simulated and measured data.
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DOI:
--
发表时间:
1974
期刊:
Journal of Laboratory and Clinical Medicine
影响因子:
--
作者:
R. D. De Gowin;L. J. Lewis;J. Hoak;A. Mueller;D. P. Gibson
通讯作者:
D. P. Gibson
影响因子:
5.4
作者:
Y. Nishioka;S. Silverstein
通讯作者:
S. Silverstein
影响因子:
5.4
作者:
Y. Nishioka;S. Silverstein
通讯作者:
S. Silverstein
影响因子:
5.6
作者:
B. Roizman;L. Aurelian
通讯作者:
L. Aurelian
DOI:
--
发表时间:
1985
期刊:
Laboratory investigation; a journal of technical methods and pathology
影响因子:
--
作者:
Macarak,EJ;Friedman,HM;Kefalides,NA
通讯作者:
Kefalides,NA