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Abstract #0490

How close are we to the theoretical maximum SNR in portable low field MRI?

Chloe Najac1 and Andrew Webb1
1Radiology, Leiden University Medical Center, C.J. Gorter MRI Center, Leiden, Netherlands

Synopsis

Keywords: Low-Field MRI, Low-Field MRI

Motivation: Many groups build their own low field scanners, with different component designs. Relative performances have not been well documented due to a lack of detailed specifications and tests.

Goal(s): To provide a set of measurements to benchmark the performance of low field scanners.

Approach: The theoretical signal is calculated from first principles, including coil Q-value and transmit efficiency. Experimental data is acquired using different coils/samples and compared with the theoretical value. The effect of external noise sources and sub-optimal coil construction is also considered.

Results: Experimental data agree well with theoretical predictions both for “optimal” and deliberately sub-optimal conditions.

Impact: A framework has been established to estimate the signal-to-noise ratio obtainable on any given design of point-of-care low field imaging system.

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Keywords