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Abstract #4708

Improved Visualization and Measurement of Intracranial Aneurysmal Walls: Comparison between 7T and 3T Black-blood MRI.

Zihao Zhang1, Zhaoyang Fan2, Chengcheng Zhu3, Xinke Liu4, Qi Yang2,5, Xianchang Zhang1,6, Qingle Kong1,6, Jing An7, and Lin Chen1,6

1State Key Laboratory of Brain and Cognitive Science, Beijing MR Center for Brain Research, Institute of Biophysics, Chinese Academy of Sciences, Beijing, People's Republic of China, 2Biomedical Imaging Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA, United States, 3Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, CA, United States, 4Department of Interventional Neuroradiology, Beijing Neurosurgical Institute and Beijing Tiantan Hospital, Beijing, People's Republic of China, 5Xuanwu Hospital, Beijing, People's Republic of China, 6University of Chinese Academy of Sciences, Beijing, People's Republic of China, 7Siemens Shenzhen Magnetic Resonance Ltd., Shenzhen, People's Republic of China

Black-blood MRI (BB-MRI) has been used to evaluate the walls of intracranial aneurysms at both 3T and 7T. However, there is no quantitative comparison between the two field strengths in terms of delineation quality of aneurysmal wall by using BB-MRI. In this study, we analyzed black-blood images acquired from the same group of patients at both 7T and 3T. Higher wall-to-lumen signal ratio (WLSR) and lower inside wall thickness (IWT) were obtained from 7T black-blood images. Our results suggest that 7T BB-MRI can provide improved visualization and measurement of intracranial aneurysmal walls.

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