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Abstract #2591

Fast Temperature Estimation Using Golden Angle Radial from Undersampled K-Space for MR Guided Microwave Ablation

Ke Wang1, Zijing Dong2, Fuyixue Wang2, Bingyao Chen3, Jiafei Yang3, Xing Wei3, and Kui Ying4

1Department of Biomedical Engineering, Tsinghua University, Beijing, People's Republic of China, 2Center for Biomedical Imaging Research, Department of Biomedical Engineering, Tsinghua University, Beijing, People's Republic of China, 3Department of Orthopedics, First Affiliated Hospital of PLA General Hospital, Beijing, People's Republic of China, 4Key Laboratory of Particle and Radiation Imaging, Ministry of Education, Medical Physics and Engineering Institute, Department of Engineering Physics, Tsinghua University, Beijing, People's Republic of China

Golden angle radial sampling is insensitive to motion and provides oversampled central k-space for self-navigation. This study aims to accelerate the acquisition with motion correction for MR temperature imaging by applying golden angle radial to hybrid model based on PRF method. The proposed method uses low resolution images obtained from a certain ratio of radius in k-space center to correct the period motion and magnetic field drift. Then, an iterative method is adopted to estimate the temperature by the hybrid model. Simulations and in-vivo experiments demonstrate the robustness to motion and effectiveness of the proposed method.

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