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Effects of intravoxel velocity distributions on the complex difference method of phase-contrast MR angiography

✍ Scribed by Craig A. Hamilton

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
204 KB
Volume
6
Category
Article
ISSN
1053-1807

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✦ Synopsis

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.

📜 SIMILAR VOLUMES

Effects of intravoxel velocity distribut
Effects of intravoxel velocity distributions on the accuracy of the phase-mapping method in phase-contrast MR angiography
✍ Craig A. Hamilton; Paul R. Moran; Peter Santago; II; Sarah A. Rajala 📂 Article 📅 1994 🏛 John Wiley and Sons 🌐 English ⚖ 426 KB

## Abstract The phase‐mapping method of phase‐contrast magnetic resonance angiography is shown to be based on an implicit assumption that the intravoxel velocity distribution is symmetric about its mean velocity. The effect of asymmetric distributions on the accuracy of quantitative average velocit