体素内速度分布对相位对比磁共振血管造影术复杂差分法的影响。
Effects of intravoxel velocity distributions on the complex difference method of phase-contrast MR angiography.
作者信息
Hamilton C A
机构信息
Department of Radiology, The Bowman Gray School of Medicine of Wake Forest University, Winston-Salem, NC 27157-1022, USA.
出版信息
J Magn Reson Imaging. 1996 Mar-Apr;6(2):409-10. doi: 10.1002/jmri.1880060223.
The complex difference method of phase-contrast MR angiography is affected not only by the degree of velocity encoding applied during the scan but also by the variance of the intravoxel velocity distribution. The reconstructed intensities of voxels with the same average flow rate but different variances of the velocity distribution can differ significantly. Mathematical analysis and scanner phantom experiments confirm this conclusion.
相位对比磁共振血管造影的复杂差分法不仅受扫描期间应用的速度编码程度的影响，还受体素内速度分布方差的影响。具有相同平均流速但速度分布方差不同的体素的重建强度可能会有显著差异。数学分析和扫描器体模实验证实了这一结论。
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