Abstract #0483

Relationship between MR characteristics of peripheral artery lesions and difficulty of peripheral endovascular procedures

James Jiewen Zhou¹, Trisha L. Roy^1,2, Hou-Jou Chen^1,3, Andrew D. Dueck^1,2, and Graham A. Wright^1,3

¹Schulich Heart Program and the Sunnybrook Research Institute, Sunnybrook Health Sciences Centre, Toronto, ON, Canada, ²Division of Vascular Surgery, Department of Surgery, University of Toronto, Toronto, ON, Canada, ³Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada

The most common mode of failure for percutaneous vascular interventions (PVI) is the inability to cross hard lesions with a guidewire. This study uses magnetic resonance (MR) lesion characterization to predict the difficulty of PVI. Steady state free precession (SSFP) MR angiography and ultrashort echo time imaging were used to categorize lesions as “hard” (e.g. calcium, collagen), or “soft” (thrombus, lipids). 17 patients were imaged prior to PVI. MRI-defined hard lesions required significantly longer time to cross (14.81 min vs 1.61 min) and required stenting more often.

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