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
Physics and Engineering, Tsinghua
University, Beijing, Beijing, China,
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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