Measurement and advanced data post-processing of proton resonance frequency shift in 7 T MRI to obtain local temperature in a tissue-mimicking phantom

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Proton resonance frequency shift methods reliably map local heating during 7 T MRI procedures, overcoming safety risks associated with large flip angles.
A temperature increase of approximately 3.5 °C occurred across phantom planes, accumulating steadily during a 114 min radio-frequency heating experiment.
Assessment using gradient-echo sequences with spatio-temporal phase unwrapping corrects b0 drift, which supports accurate monitoring in high-field MRI.

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Experimental study demonstrates local temperature mapping in a tissue-mimicking phantom, indicating viable thermal monitoring during 7 T MRI.

Garcia et al. (2024) studied this question.

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Experimental study demonstrates local temperature mapping in a tissue-mimicking phantom, indicating viable thermal monitoring during 7 T MRI.