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Abstract #3785

Image contrast at sub-millisecond echo times

Jinil Park1,2, Soon Ho Yoon3, Chanhee Lee1, Jin Mo Goo3, and Jang-Yeon Park1,2

1Center for Neuroscience Imaging Research, Institute for Basic Science (IBS), Suwon, Korea, Republic of, 2Department of Biomedical Engineering, Sungkyunkwan University, Suwon, Korea, Republic of, 3Department of radiology, Seoul National University Hospital, Seoul University College of Medicine, Seoul, Korea, Republic of

Some contrast mechanisms like in- and out-of-phase contrasts of fat and water come into play at sub-millisecond echo times(TE) at high field strengths above 3T, and under-recognition of them can lead to misunderstanding of signal intensities and inappropriate interpretation of normal and disease pathology. Here the TEs including the sub-millisecond ones were estimated at various field strengths and it was demonstrated by phantom and human lung imaging that contrast mechanisms are apparently seen at the sub-millisecond TE and thus should not be overlooked at high field strengths when using UTE imaging techniques that can cover the range of sub-millisecond TE.

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