Toward a 16-channel loop-dipole combined dielectric resonator antenna array for human brain MRI at 7T using pTX

Name: Breakfast & Science Seminar 50
Start: 2025-04-29
End: 2025-04-29
Location: HUG Tour 8

AUTHORS: Wenz D., Dardano T.,

ISMRM & SMRT Annual Meeting & Exhibition, : , Singapore, 06 May 2024

ABSTRACT

Motivation

To develop a new generation of head coils for ultrahigh field MRI using loop-dipole combined dielectric resonator antenna arrays.

Goal

To construct and evaluate an 8-channel loop-coupled dielectric resonator antenna array for brain MRI at 7T.

Approach

Electromagnetic field simulations in a spherical phantom and Duke for different types of RF feeds were performed. An 8-channel, loop-coupled dielectric resonator antenna array was constructed using 8 ceramic, rectangular dielectric blocks (ε_r=275, σ=0.068 S/m).

Results

An 8-channel loop-coupled dielectric resonator antenna array was successfully constructed and evaluated at the bench as well as in preliminary phantom experiments at 7T using pTX system.

Impact

This study is an important step to improve transmit and receive performance of head coils for neuroimaging at 7T.