Abstract #4209

Using field monitoring to map and correct image distortions due to gradient nonlinearities

Ying-Hua Chu^1,2, Yi-Cheng Hsu^1,2, Fa-Hsuan Lin², and Maxim Zaitsev¹

¹Dept. of Radiology, Medical Physics, Medical Center University of Freiburg, Faculty of Medicine, Freiburg, Germany, ²Institute of Biomedical Engineering, National Taiwan University, Taipei, Taiwan

We demonstrate how a field probe array can be used to measure gradient nonlinearities. Brain imaging results show that the distortion was most prominent at image voxels away from the iso-center. Compared to MRI vendor’s solution, our measurements and reconstruction could further reduce the image distortion by 35%.

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