Abstract #4246

PETRA subtraction-based MRA to assess middle-cerebral-artery stenosis before and after treatment with angioplasty

Feifei Zhang¹, Yuncai Ran¹, Shujian Li¹, Jinxia Zhu², Xuemei Gao¹, Jingliang Cheng¹, and Chengcheng Zhu³

¹The first Affiliated Hospital of Zhengzhou University, Zhengzhou, China, Zhengzhou, China, ²MR Collaboration, Siemens Healthcare Ltd., Beijing, China, Beijing, China, ³Department of Radiology, University of Washington, Seattle, Seattle, WA, United States

This study investigated the feasibility of PETRA-MRA to evaluate stent angioplasty of middle-cerebral-artery stenosis before and after treatment. PETRA-MRA was shown to significantly reduce susceptibility artifacts induced by metallic devices, decrease the phase dispersion of labeled flow, and increase the signal intensity within the stent. Compared to TOF-MRA, PETRA-MRA has better consistency with DSA in image quality and stenosis measurement, especially for follow-up assessments after stent angioplasty.

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