Introduction to holospectral imaging in nuclear medicine for scatter subtraction.
Introduction to holospectral imaging in nuclear medicine for scatter subtraction.
复制标题
核医学中用于散射减法的全谱成像简介。
DOI：
--
复制
发表时间：
1989
影响因子：
10.6
通讯作者：
G. Dupras
中科院分区：
文献类型：
--
作者：
Daniel Gagnon;A. Todd;A. Arsenaualt;G. Dupras
针对核医学成像中的康普顿散射污染问题，提出了一种图像分析与处理的方法--全息谱成像。该方法要求能量信息可用于所有探测到的光子。然后形成表示不同能量下的空间分布的一组帧（通常为16个）。分析了这些能量框架之间的关系，并将原始数据转换为一系列特征图像和特征值。在该空间中，可以区分初级光子和散射光子以及噪声对图像的具体贡献。在初级光子的贡献主导图像结构的假设下，可以执行滤波过程以减少散射污染。通过滤波过程去除的散射信息的比例针对所有图像进行评估，并且取决于残余量子噪声的水平，残余量子噪声的水平从较小特征值的大小估计。结果表明，统计噪声略有增加，但也增加了对比度，并大大提高了量化图像的能力。
An approach to image analysis and processing, called holospectral imaging, is proposed for dealing with Compton scattering contamination in nuclear medicine imaging. The method requires that energy information be available for all detected photons. A set of frames (typically 16) representing the spatial distribution at different energies is then formed. The relationship between these energy frames is analyzed, and the original data is transformed into a series of eigenimages and eigenvalues. In this space it is possible to distinguish the specific contribution to the image of both primary and scattered photons and, in addition, noise. Under the hypothesis that the contribution of the primary photons dominates the image structure, a filtering process can be performed to reduce the scattered contamination. The proportion of scattered information removed by the filtering process is evaluated for all images and depends on the level of residual quantum noise, which is estimated from the size of the smaller eigenvalues. Results indicate a slight increase in the statistical noise but also an increase in contrast and greatly improved ability to quantitate the image.
单光子发射计算机断层扫描中康普顿散射减法的蒙特卡罗评估。
影响因子：
3.8
作者：
Floyd,CE;Jaszczak,RJ;Harris,CC;Greer,KL;Coleman,RE
通讯作者：
Coleman,RE
使用散射光子补偿改进 SPECT 量化。
DOI：
--
发表时间：
1984
期刊：
Journal of nuclear medicine : official publication, Society of Nuclear Medicine
影响因子：
--
作者：
Jaszczak,RJ;Greer,KL;FloydJr,CE;Harris,CC;Coleman,RE
通讯作者：
Coleman,RE