Parallel transmission of cardiac imaging using statistical initial phase optimization at 5T

High-field magnetic resonance imaging is one of the main development directions of magnetic resonance cardiac imaging because of its high signal-to-noise ratio and more anatomical details. However, with the increase of field strength, the homogeneity of B1 field is a serious challenge, and parallel transmission is one of the important methods to solve this problem. In this work, we proposed a clinically applicable radiofrequency shimming method to improve the imaging quality of cardiac imaging at 5T MRI. Statistical methods were employed to find out a better initial phase of an eight-channel coil and enhance the stability of cardiac imaging.