Meeting Banner
Abstract #3963

Towards Developing Device Testing Methods in Low-Field MRI: Electrical Properties in Tissue-Mimicking Media at 0.5T

Jessica A. Martinez1,2, Stephen E. Ogier1, Stephen E. Russek1, and Kathryn E. Keenan1
1Physical Measurement Laboratory, National Institute of Standards and Technology (NIST), Boulder, CO, United States, 2Department of Physics, University of Colorado Boulder, Boulder, CO, United States

Synopsis

Keywords: Safety, Safety, RF-induced heating, device testing, Electromagnetic Simulations

Motivation: Current ASTM standards for MRI device testing are optimized for 1.5T/3T systems. These standards require adaptation for 0.5T systems due to frequency-dependent electrical properties.

Goal(s): To develop and validate a modified ASTM gel formulation matching muscle properties at 0.5T.

Approach: ASTM gel formulation was modified to match muscle electrical properties at 23 MHz, and its performance evaluated through electromagnetic field simulations.

Results: Adding glycine to the ASTM gel formulation successfully matched the dielectric properties of muscle at 0.5T. Electromagnetic simulations with both the ASTM and modified gels indicated that the electric field is sensitive to the selected dielectric properties.

Impact: This work demonstrates the importance of matching electrical properties for device testing at 0.5T MRI. The study proposes a modified ASTM gel formulation for performing accurate device safety assessments at this field strength.

How to access this content:

For one year after publication, abstracts and videos are only open to registrants of this annual meeting. Registrants should use their existing login information. Non-registrant access can be purchased via the ISMRM E-Library.

After one year, current ISMRM & ISMRT members get free access to both the abstracts and videos. Non-members and non-registrants must purchase access via the ISMRM E-Library.

After two years, the meeting proceedings (abstracts) are opened to the public and require no login information. Videos remain behind password for access by members, registrants and E-Library customers.

Click here for more information on becoming a member.

Keywords