A theoretical framework to investigate the effect of high permittivity materials in MRI using anatomy-mimicking cylinders.

ABSTRACT:

Purpose

Recent numerical and empirical results proved that high permittivity materials (HPM) used in pads placed near the subject or directly integrated with coils can increase the SNR and reduce the specific absorption rate (SAR) in MRI. In this paper, we propose an analytical investigation of the effect on the magnetic field distribution of a layer of HPM surrounding an anatomy-mimicking cylindrical sample.

Methods

The study is based on a reformulation of the Mie scattering for cylindrical geometry, following an approach recently introduced for spherical samples. The total field in each medium is decomposed in terms of inward and outward electromagnetic waves, and the fields are expressed as series of cylindrical harmonics, whose coefficients can be interpreted as classica

SUBMITTER: Miranda V 

PROVIDER: S-EPMC11550860 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature