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Abstract #4126

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

Wending Tang1, Xing Wei2, Muheng Li1, Fuyixue Wang3,4, Zijing Dong3,5, Danna Wei6, Kawin Setsompop3,4,5, 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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