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Abstract #1626

Distortion Correction Method for Single Echo DTI at 7T MRI Using Non-Distortion and Distortion Dimension Combined PSF Mapping Technique

Se-Hong Oh1, Jun-Young Chung1, Sung-Yeon Park1, Daeshik Kim2, Myung-Ho In3, Maxim Zaitsev4, Oliver Speck3, Young-Bo Kim1, Zang-Hee Cho1

1Neuroscience Research Institute, Gachon University of Medicine and Science, Incheon, Korea, Republic of; 2Department of Electrical Engineering, Korea Advance Institute of Science and Technology, Daejeon, Korea, Republic of; 3Department of Biomedical Magnetic Resonance, Institute for Experimental Physics, Otto-von-Guericke University Magdeburg, Magdeburg, Germany; 4Department of Radiologic Research, Medical Physics, University Hospital of Freiburg, Freiburg, Germany

To acquire high resolution DTI images at 7T, we should solve two major problems (One thing is reduce TE, another thing is correct geometric distortion). To minimize TE and increase SNR, we modified EPI based double echo diffusion sequence to EPI based single echo diffusion sequence. Afterwards we could reduce 16ms. To correct geometric distortion use distortion and non-distortion dimensional combined PSF correction method. Then we can correct the geometric distortion both compressed and stretched area more accurately.