Electric field and SAR reduction in high-impedance RF arrays by using high permittivity materials for 7T MR imaging.

ABSTRACT: In the field of ultra-high field MR imaging, the challenges associated with higher frequencies and shorter wavelengths necessitate rigorous attention to multichannel array design. While the need for such arrays remains, and efforts to increase channel counts continue, a persistent impediment-inter-element coupling-constantly hinders development. This coupling degrades current and field distribution, introduces noise correlation between channels, and alters the frequency of array elements, affecting image quality and overall performance. The goal of optimizing ultra-high field MRI goes beyond resolving inter-element coupling and includes significant safety considerations related to the design changes required to achieve high-impedance coils. Although these coils provide excellent isolation,

SUBMITTER: Bhosale AA 

PROVIDER: S-EPMC11221758 | biostudies-literature | 2024

REPOSITORIES: biostudies-literature