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
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
PETRA-MRA
is a promising non-invasive technique to evaluate MCA stenoses and could be an
alternative technique for patient follow-up assessments after stent
angioplasty.
Fig1. Example results in a 63-year-old female patient who had left stent angioplasty in the left middle-cerebral-artery M1 segment. Preoperative (top row) and post-operative (bottom row) images are shown for time-of-flight magnetic resonance angiography (TOF-MRA, left), pointwise encoding time reduction with a radial acquisition (middle, PETRA-MRA), and digital subtraction angiography (right). Preoperative images indicated a similar degrees of stenosis (blue arrow). Obvious signal loss was observed in post-operative scans, with PETRA-MRA outperforming TOF-MRA.
Table 1. Comparison of PETRA-MRA/TOF-MRA and DSA in measurements of stenosis of MCA