A MOM/FEM-based coil sensitivity mapping method for high-field parallel MRI

In this study, an electromagnetics-based inverse sensitivity mapping method is introduced for applications in high field MRI. Instead of using simplistic numerical approximations, the sensitivity of the radio-frequency coil was determined through a field approach by using iterative optimization. The current study is an extension to previous studies on the inverse method, which has restricted itself to low-field applications due to the use of the Biot-Savart integration to account for the H field calculations. In the current study, full-wave solutions to the Maxwell´s equations based MOM/FEM hybrid algorithm were employed to provide H field evaluation. It is demonstrated that the proposed method is able to produce high-fidelity sensitivity estimation which result in images with significantly less artefact power.