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Abstract #1194

Aorto-Iliac Flow Sensitive MRI: Blood Flow Pre and Post Endovascular Aortic Repair

Maximilian Frederik Russe1, Philipp Blanke1, Wulf Euringer1, Julia Geiger1, Zoran Stankovic1, Bernd Jung1, Mathias Langer1

1Diagnostic Radiology - Medical Physics, University Hospital, Freiburg, Germany

Blood flow patterns are altered in aortic aneurysms. After endovascular aortic repair (EVAR), changes in flow patterns are conceivable, potentially resulting in stent-specific complications such as iliac limb thrombosis due to functional stenosis or proximal neck dilation. Using flow-sensitive MRI and flow visualization, flow patterns were studied in vivo prior and after EVAR. While pre-EVAR aortic blood flow patterns were characterized by vortex-formation and flow deceleration during passage through the aneurysm, post-EVAR blood flow was laminar with similar velocities in the stent body and the aorta proximal to the stent, but with strongly increased velocities in the iliac limbs.

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Keywords

acceleration accelerations accepted acquisition adjacent aliasing allows alterations altered anatomy aneurysm aneurysms aorta aortic apex arteries assess blood bodies body breathing characteristics characterized complications comprehensive constituting coronal correction cycle deceleration deployment design diagnostic diaphragm dilation directional eddy encoding feasibility flow focal forces formation free functional gain gaining gated gating gradient graft grafts healthy heart hope hospital iliac included induced insights interleaved investigate investigators japan kingdom laminar limb limbs locations male medical migration motion navigator neck oblique occur open option outcome particle passage patients pattern patterns physics positions possibly post potential prior processing progression pronounced prospectively proximal quantification radiology regaining related relationship renal repair respiratory risk rupture scanner segments sensitive spatial spoiled strongly studied successfully system table temporal thrombosis thrombus throughout traces treatment trial vascular velocities velocity vessel visualization volume vortex wall whole years