Simulation of B0 Magnetic Field Conditions in the Human Heart for Improved B0 Shimming in Cardiovascular MRI

作者：Yun Shang, Sebastian Theilenberg, Michelle Castillo, Boyu Peng, Maggie Fung, Patrick Quarterman, Benjamin Navot, Sachin Jambawalikar, Andrew J. Einstein, Christoph Juchem · 发表于：Proceedings on CD-ROM - International Society for Magnetic Resonance in Medicine. Scientific Meeting and Exhibition/Proceedings of the International Society for Magnetic Resonance in Medicine, Scientific Meeting and Exhibition · 年份：2024 · DOI：10.58530/2024/3922 · 被引用次数：1 · 研究领域：Advanced MRI Techniques and Applications、Cardiac Imaging and Diagnostics、Medical Imaging Techniques and Applications

Motivation: Balanced SSFP sequences in cardiovascular MRI suffer from dark band artifacts due to B0 inhomogeneity. Limited detail of in vivo B0 conditions apparent in various population groups impede the development of optimal cardiac B0 shim methods. Goal(s): To validate our recently-published high-resolution B0 simulation approach of B0 conditions in the human heart based on structural CT images. Approach: Validation was achieved through direct comparison of B0 conditions computationally derived from structural CT images, vs. in vivo B0 maps obtained experimentally on the same five subjects. Results: Excellent agreement occurred between simulated and in vivo B0 maps, with an average spatial correlation of 0.91. Impact: The validated cardiac B0 simulation from readily-available structural CT images enables characterization of B0 conditions in populations with wide-spread demographics of age, sex, height, weight and the development of advanced B0 shimming methods to improve diagnostic accuracy in cardiovascular MRI.