Experimental study on the accuracy of non-invasive temperature measurement by magnetic resonance in microwave ablation.

<bold>Aims: </bold>This study aimed to explore the accuracy of non-invasive temperature measurement based on proton resonance frequency (PRF) phase subtraction in microwave ablation (MWA).<bold>Methods and Material: </bold>The signal change of the agar phantom during the ablation process was monitored by the gradient echo sequence under 1.5 T superconducting magnetic resonance imagining (MRI), and the temperature change was converted by the phase subtraction method of the PRF, which was compared with the temperature measured using an optical fiber.<bold>Statistical Analysis Used: </bold>SPSS software version 22.0 was used for data processing, and the independent sample t-test was used for comparative analysis. P < 0.05 indicated statistical significance.<bold>Results: </bold>The maximum error between the MRI temperature measurement and the standard value was 3.61°C, whereas the minimum and average errors were 0.01°C and 1.19°C ± 0.78°C, respectively.<bold>Conclusions: </bold>The temperature measurement technology, which is based on the PRF phase method, has good accuracy in MRI-guided MWA. [ABSTRACT FROM AUTHOR]