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Abstract #1218

To Investigate the Motion Artifact of Diffusion Weighted MRI in Parotid

Yi-Hsiung Lee1, Yi-Jui Liu2, Hing-Chiu Chang3, Chun-Jung Juan4, Teng-Yi Huang5, Fu-Nien Wang6

1Ph. D. Program of Electrical and Communications Engineering, Feng Chia University, Taichung, Taiwan; 2Department of Automatic Control Engineering, Feng Chia University, Taichung, Taiwan; 3Brain Imaging and Analysis Center, Duke University, Durham, NC, United States; 4Department of Radiology, Tri-Service General Hospital, Taipei, Taiwan; 5Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan; 6Department of Biomedical Engineering and Environmental Sciences College of Nuclear Science, National Tsing Hua University, Hsinchu, Taiwan

The DWI is widly used for diagnostic characterization of head and neck cancers, but inter-experimental comparison of parotid ADC remains difficult because of the wide variation of ADC measurements even in healthy volunteers. Most of studies attributed to the different b values, imaging distortion, chemical shift artifacts and fat content . The signal loss of DWI is often observed in liver study, but it seldom reports in head and neck. Our results demonstrate that the minor motion of mouth was occurred as DWI scan, and it is also an influence factor for ADC measurement in parotid.