Abstract #4597

Highly Accelerated Abdominal 4D Flow at 5.0T: A Feasibility Study

Ruiyu Cao¹, Shaohang Li¹, Aiqi Sun², Hui Zhang¹, Bingyi Wang¹, Junpu Hu³, Ne Yang⁴, Jiayu Zhu³, Xijing Zhang³, Jianmin Yuan³, He Wang¹, and Hao Li¹

¹Institute of Science and Technology for Brain-Inspired Intelligence, Fudan University, Shanghai, China, ²Department of Radiology, Stanford University, Stanford, San Francisc, CA, United States, ³Central Research Institute, United Imaging Healthcare Group, Shanghai, China, ⁴United Imaging Research Institute of Intelligent Imaging, Beijing, China

Synopsis

Keywords: Data Acquisition, Flow, ultra-high field

Motivation: The increased SNR of 5.0T MR system may offer greater acceleration potential for abdominal 4D flow imaging, which is limited by long acquisition times and motion artifacts.

Goal(s): To assess the feasibility of abdominal 4D flow imaging at 5T and investigate its acceleration potential for achieving clinically practical scan times.

Approach: Optimized undersampling patterns and motion-corrected reconstruction were developed; both retrospective simulations and prospective 4-times accelerated undersampling were conducted.

Results: High undersampling rates (8-times) maintained stable image quality and quantification accuracy, supporting the feasibility of accelerated, free-breathing abdominal 4D flow imaging at ultra-high field strength.

Impact: This study demonstrated the feasibility of highly accelerated abdominal 4D flow imaging at 5.0T. With an optimized sampling pattern and motion-corrected reconstruction, it enables motion-resilient, free-breathing imaging for clinical abdominal vascular assessment within acceptable scan times.

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