Simultaneous Acquisition of Temperature Mapping for Fatty and Nonfatty Biological Tissues based on Look-Locker Technique with dual echoes

Motivation: Temperature errors in PRFS occur primarily in tissues containing adipose substances because fat changes its magnetic susceptibility with temperature. Goal(s): This study aimed to simultaneously monitor the temperatures of fat and non-fat tissues using Look-Locker (LL) technique with dual echoes. Approach: Two-point Dixon technique can be utilized to estimate the adipose components, which may aid in the separation of adipose tissue in PRFS. In addition, the method allows for a more refined Bo correction. Results: Compared to the temperature measured by the fiber-optic sensor, the PRFS and T1-based temperatures showed a small difference of about 0.11 ~ 0.22 ℃ and 0.06 ~ 0.15 ℃, respectively. Impact: his study yields an evidence that Look-Locker technique with dual echoes is suitable for simultaneous acquisition of temperature mapping for adipose and non-adipose tissues, providing an accurate temperature monitoring comparable to a fiber-optic sensor as well as rapid acquisition.