Abstract #4126

MR thermometry based on PRF using echo planar time-resolved imaging (EPTI)

Wending Tang¹, Xing Wei², Muheng Li¹, Fuyixue Wang^3,4, Zijing Dong^3,5, Danna Wei⁶, Kawin Setsompop^3,4,5, and Karen Ying¹

¹Department of Engineering Physics, Tsinghua University, Beijing, China, ²Orthopedic Department, Aerospace Center Hospital, Beijing, China, ³Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, MA, United States, ⁴Harvard-MIT Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA, United States, ⁵Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, United States, ⁶Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, China

Proton resonance frequency (PRF) of water protons is widely utilized in MR thermometry. EPI sequence is often used to speed up the imaging rate, but suffers from geometric distortion and blurring. Here we proposed a rapid temperature mapping method through the EPTI sequence. EPTI sequence is a new multi-shot EPI technique capable of rapidly obtaining distortion-free images. Via this method, greater speed is achieved for monitoring temperature, which makes real-time temperature mapping possible.

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