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Abstract #1916

Image-based estimation of point spread function in distorted EPI images

Seiji Kumazawa1, Takashi Yoshiura2, Akihiro Kikuchi1, Go Okuyama1, Daisuke Shimao1, and Masataka Kitama1

1Hokkaido University of Science, Sapporo, Japan, 2Kagoshima University, Kagoshima, Japan

To correct the distortion in EPI due to field inhomogeneity, the information regarding the signal from adjacent points within each voxel is needed. The PSF approach can provide this information. Our purpose was to develop an image-based-method for estimating the PSF images in the distorted EPI image using T1WI. Our method synthesizes the distorted image to match the measured EPI image through the generation process of EPI image according to a single-shot EPI k-space trajectory and field inhomogeneity. The results demonstrate that the PSF image for each voxel in distorted EPI image can be estimated by proposed method using segmented T1WI instead of additional acquisitions for PSF measurement.

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