Abstract #1228

Characterization of Ultra-short Echo and Standard echo Phase-Contrast MRI for Neurovascular disease application

Dahan Kim^1,2, Katrina Ruedinger³, David Rutkowski³, Alejandro Roldán-Alzate^4,5, Patrick Turski^2,5, and Kevin M Johnson^2,5

¹Department of Physics, University of Wisconsin - Madison, Madison, WI, United States, ²Department of Medical Physics, University of Wisconsin - Madison, Madison, WI, United States, ³Department of Biomedical Engineering, University of Wisconsin - Madison, Madison, WI, United States, ⁴Department of Mechanical Engineering, University of Wisconsin - Madison, Madison, WI, United States, ⁵Department of Radiology, University of Wisconsin - Madison, Madison, WI, United States

We examined velocity measurements of standard (STD-PC) and ultra-short echo (UTE-PC) phase-contrast MRI in three different study cases, to characterize the effect of shortening echo time on artifacts from flow and metal. We found that UTE-PC measures higher velocity magnitudes not only in disturbed flow but also in normal vasculature, that UTE-PC results in smaller divergence of velocity field but no difference in erroneous flux through arterial wall within metal aneurysm stent, and that UTE-PC higher velocity magnitudes, less signal loss, and coherent flow directions in both untreated and un-treated aneurysm phantom.

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