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Abstract #2357

Preliminary study on motion correction in model-based MR thermometry

Dengrong Jiang 1 , Dan Zhu 2 , Shuo Chen 2 , Shuo Chen 1 , and Kui Ying 1

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

Goal of this work is to correct intra-frame motion induced errors in model-based MR temperature mapping. Model-based temperature mapping exploits multi-echo signal model to estimate temperature information, thus eliminates the effects of field drifting and inhomogeneity, and is robust to inter-frame motion. However, it is sensitive to intra-frame motion due to its relatively long acquisition time. We addressed this problem by incorporating motion models into multi-echo image reconstruction to compensate for motion induced phase distortions and image artifacts. A prototype framework of motion correction was proposed in this work, and simulations were performed to validate its efficiency.

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