Does Proton Resonance Frequency Linearly Change with Temperature?

Donghoon Lee¹, Kenneth Marro¹, Bryan Cunitz¹, Michael Bailey¹

To improve the accuracy in temperature measurements over a wide temperature region (20 95 C), we designed and fabricated a test sample holder and conducted temperature measurements over the temperature range. The test sample holder comprised a reference chamber for temperature reference and a heating chamber. Both chambers, filled with water, were in well thermal insulation. Nonlinear relationship between proton resonance frequency shift and temperature was observed for the wide temperature region. Accurate information of temperature variations over a wide temperature region would be valuable to thermal therapy for a temperature region that could reach the water boiling temperature.