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Medical Imaging News – Susceptibility Weighted Imaging in the Evaluation of Cerebrovascular Hemodynamics

By Carlos Zamora – Guest Editor – American Journal of Neuroradiology News Digest

Susceptibility-weighted imaging (SWI) is a high-resolution, fully velocity-compensated gradient-echo MRI sequence that maximizes intrinsic contrast differences between tissues by virtue of their local magnetic properties. This technique exploits susceptibility information contained within phase acquisitions and merges such with magnitude data to generate a clinically usable set of images.

Notably, the functional incorporation of phase data in a clinical sequence was initially challenging and warranted improvements in MRI technology that eventually culminated in the development of SWI. The entire sequence requires no more than a few minutes of scanning time and can be effectively applied in a clinical setting.

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