Xinyi Pan1, Cheng Li1, Kui Ying1, Dehe Weng2, Wen Qin3, Kuncheng Li3
1Engineering Physics, Tsinghua University, Beijing, China; 2Siemens Mindit Magnetic Resonance Ltd. (SMMR), Shenzhen, Guangdong, China; 3Radiology, Xuanwu Hospital, Beijing, China
MR temperature mapping based on a novel PRFS temperature model using fat as the internal reference previously proposed by us can greatly reduce the inter-scan motion or deformation and field drift induced quantification errors which are often encountered in conventional phase mapping PRF method. To validate such improvement, specific-designed phantom experiments were conducted to validate the feasibility of the model in handling motion and field drift related problems in this work. It is also demonstrated that the thermocouple probe induced susceptibility artifact in the temperature maps can be eliminated by the B-spline fitting of chemical shift.
Keywords