Adaptive radiofrequency shimming in MRI using reconfigurable dielectric materials.

ABSTRACT: Inhomogeneity of the transmitted radiofrequency field ([Formula: see text]) is a major factor hindering the image quality in Magnetic Resonance Imaging (MRI) at high field strengths. Here, a novel approach is presented, to locally modulate the [Formula: see text] utilizing an array of high permittivity materials with switchable connections. A 3×3 array of barium titanate suspension elements was constructed, with two PIN diode-based switchable connectors per element. Electromagnetic simulations were performed to determine configurations that produce strong [Formula: see text] modulation. Remote [Formula: see text] field switching was tested in a disk- and a torso-shaped phantom at 3T by applying different bias voltages to the PIN diodes. The attained [Formula: see text] modulation was asses

SUBMITTER: Siuryte P 

PROVIDER: S-EPMC12824193 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature