Abstract #1580

Frequency Selective Flux Focusing Passive Lenz Resonators for Substantial MRI Signal-to-Noise Ratio Amplification

Aaron Earl Hodgson¹, Yurii Shepelytskyi^2,3, Viktoriia Batarchuk^2,3, Nedal Al Taradeh¹, Vira Grynko⁴, and Mitchell Albert^2,3,5

¹Physics, Lakehead University, Thunder Bay, ON, Canada, ²Chemistry, Lakehead University, Thunder Bay, ON, Canada, ³Thunder Bay Regional Health Research Institute, Thunder Bay, ON, Canada, ⁴Chemistry and Material Sciences, Lakehead University, Thunder Bay, ON, Canada, ⁵Northern Ontario School of Medicine, Thunder Bay, ON, Canada

Synopsis

Keywords: New Devices, New Devices, MRI, SNR enhancement, flux-focusing elements, Lenz lens, Lenz Resonator, Signal Amplification

Motivation: Despite numerous developments since MRI’s invention, low sensitivity remains the main limitation.

Goal(s): We aimed to improve upon the Lenz lens design for passive signal amplification in MRI, ultimately improving the signal-to-noise ratio.

Approach: We created a first-in-kind Lenz resonator, a passive frequency selective flux-focusing circuit, to isolate and enhance the signal from a desired nucleus.

Results: Performing RF testing with a vector network analyzer there was a 60 times signal amplification for the proton resonance frequency. At 3.0T, MRI demonstrated an experimental amplification of the signal-to-noise ratio by 3.9 times using an MRI insert of two coaxial Lenz resonators.

Impact: The substantial SNR boost produced by our Lenz resonators has a paramount importance for the field of MRI. The superior increase in SNR allows quicker scans, higher resolution scans, and precise disease detection.

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