Optimising TIAMO shim modes for non-conventional RF coils at 7T

Motivation: Ultra-high-field MRI is hindered by signal homogeneity issues due to non-uniform B1+ fields. While TIAMO improves image quality by using phase shim pairs, existing methods are incompatible with non-conventional RF coils, which are emerging in UHF imaging. Goal(s): This study aimed to optimise TIAMO phase shim pairs for non-conventional RF coils to enhance signal homogeneity for UHF-MR. Approach: We optimised phase shim using B1+ and B1- maps from various custom RF coils, and validated them on a 7T MR scanner. Results: The optimisation led to significant improvements in image homogeneity, demonstrating the feasibility of extending TIAMO to non-conventional coils. Impact: This abstract will allow the application of TIAMO on non-conventional RF coils (i.e. coils without a fixed phase increment between adjacent transmit channels) for 7T MR.