Radiofrequency-transparent local B₀ shimming coils using float traps.

ABSTRACT:

Purpose

Static field (B₀) inhomogeneities present a major challenge in high-field MRI. Multicoil shimming using independent, local, direct-current (DC) shim coils has emerged as a powerful and flexible technique to address this issue. However, many-turn DC coils can lead to significant mutual coupling with radiofrequency (RF) coils, causing transmit field (B₁ ⁺) distortions and signal-to-noise ratio degradation.

Methods

We introduce an innovative RF-transparent DC coil that performs B₀ shimming while minimizing RF performance impact. The design incorporates float traps to maintain high RF impedance, allowing flexible placement relative to the RF coil without compromising signal-to-noise ratio or affecting B₁ ⁺

SUBMITTER: Liu C 

PROVIDER: S-EPMC11782720 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature