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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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