Hybrid active and passive local shimming (HAPLS) for two-region MRI.

ABSTRACT:

Purpose

An MRI scanner is equipped with global shim systems for shimming one region of interest (ROI) only. However, it often fails to reach state-of-the-art when shimming two isolated regions of interest simultaneously, even though the two-area shimming can be essential in scan scenarios, such as bilateral breasts or dyadic brains. To address these challenges, a hybrid active and passive local shimming technique is proposed to simultaneously shim two isolated region-of-interest areas within the whole FOV.

Methods

A local passive shimming system is constructed by optimized bilateral ferromagnetic chip arrays to compensate for the magnet's significant high-order B₀ inhomogeneities at the boundary of the manufacturer's specified homogeneous volume, thus locally impr

SUBMITTER: Ren ZH 

PROVIDER: S-EPMC10181861 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature