The possible influence of third-order shim coils on gradient-magnet interactions: an inter-field and inter-site study.

ABSTRACT:

Objective

To assess the possible influence of third-order shim coils on the behavior of the gradient field and in gradient-magnet interactions at 7 T and above.

Materials and methods

Gradient impulse response function measurements were performed at 5 sites spanning field strengths from 7 to 11.7 T, all of them sharing the same exact whole-body gradient coil design. Mechanical fixation and boundary conditions of the gradient coil were altered in several ways at one site to study the impact of mechanical coupling with the magnet on the field perturbations. Vibrations, power deposition in the He bath, and field dynamics were characterized at 11.7 T with the third-order shim coils connected and disconnected inside the Faraday cage.

Results

For the same whole-body gradient

SUBMITTER: Boulant N 

PROVIDER: S-EPMC10995016 | biostudies-literature | 2024 Apr

REPOSITORIES: biostudies-literature