Signal-to-noise trade-offs between magnet diameter and shield-to-coil distance for cylindrical Halbach-based portable MRI systems for neuroimaging.

ABSTRACT:

Objective

To investigate the trade-off between magnet bore diameter and the distance between the conductive Faraday shield and RF head coil for low-field point-of-care neuroimaging systems.

Methods

Electromagnetic simulations were performed for three different Faraday shield geometries and two commonly used RF coil designs (spiral and solenoid) to assess the effects of a close-fitting shield on the RF coil's transmit and receive efficiencies. Experimental measurements were performed to confirm the accuracy of the simulations. Parallel simulations were performed to assess the static magnet ( B0 ) field as a function of the magnet bore diameter. The obtainable SNR was then calculated as a function of these two related variables.

Results

Simulations of the RF coil charac

SUBMITTER: Parsa J 

PROVIDER: S-EPMC11790726 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature