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Abstract #4741

Improved MR Temperature Imaging at 0.5T with Multi-echo Thermometry

Ziyi Pan1, Jianxiong Hu2, Hai Luo2, Simin Liu1, Sisi Li1, Ziyue Wu2, and Hua Guo1
1Center for Biomedical Imaging Research, Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, China, 2Marvel Stone Healthcare Co., Ltd., Wuxi, China


Low field MR-guided thermotherapy can provide some key advantages over the high-field alternative, including reduced cost, decreased susceptibility artifacts, and improved safety of interventional devices. However, both the accuracy and the speed of PRF temperature measurement suffer at the low field due to the reduced SNR, limited receive channels, and declined temperature-induced phase changes, making it unreliable for clinical MRgLITT treatments. In this study, we demonstrate that the multi-echo thermometry together with the view-sharing acceleration can be utilized to achieve high-quality PRF thermometry at 0.5T with satisfactory temperature measurement precision and temporal resolution.

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