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Abstract #1567

k-t ESPIRiT for Accelerating Proton Resonance Frequency Shift MR temperature mapping

Chen Guang Peng 1 , Dan Zhu 2 , Fei Yu Chen 2 , and Kui Ying 1

1 Physics and Engineering, Tsinghua University, Beijing, Beijing, China, 2 Biomedical Engineering,Tsinghua University, Beijing, Beijing, China

We proposed k-t ESPIRiT for dynamic imaging, and applied it to PRFS thermometry. Accurate sensitivity maps computed from k-t ESPIRiT enables a phase preservation in image reconstruction, which is the prerequisite for the widely used PRFS on thermometry. Experimentally, we compare the proposed method with k-t FOCUSS on phantom under high under-sampled factor. We demonstrated that phase map reconstructed from K-t ESPIRiT is more accurate than k-t FOCUSS, and that temperature estimation of k-t ESPIRiT is closer to the reference. Therefore, k-t ESPIRiT performs better than k-t FOCUSS on PRFS acceleration.

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