Abstract #2109

Evaluation of the Effect of Trajectory Correction with Radial Sampling on Temperature Imaging

Tongxin Chen¹, Fuyixue Wang¹, Zijing Dong¹, Haikun Qi², Shi Wang³, Huijun Chen², and Kui Ying³

¹Department of Biomedical Engineering, Tsinghua University, Beijing, China, People's Republic of, ²Center for Biomedical Imaging Research, Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, China, People's Republic of, ³Key Laboratory of Particle and Radiation Imaging, Ministry of Education, Medical Engineering and Institute, Department of Engineering Physics, Tsinghua University, Beijing, China, People's Republic of

Radial sampling is sensitive to trajectory errors and can cause image distortions. To investigate the effect of trajectory errors on temperature imaging, we first evaluated the use of Trajectory Auto-Corrected Image Reconstruction (TrACR), a method to reconstruct radial images without trajectory errors, for radial temperature imaging. Then, we examined the feasibility of TrACR with only one calibration on dynamic temperature imaging based on the assumption that gradient errors are time-invariant. Through phantom heating experiments, we validated that both of the TrACR and the single-calibration TrACR can correct the errors of normal and golden angle radial sampling and provide improved temperature accuracy.

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