Currently, PRF MR thermometry is commonly used for temperature monitoring and thermal dose estimation during MRgFUS treatments. The temperature is calculated based on the phase change between the current image and the baseline image, which is acquired before each sonication starts. This does not account for residual heat from previous sonications. In this work, we have developed a volumetric long-term thermometry technique to measure the change in temperature of the entire region of treatment for the duration of the procedure
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