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Abstract #4144

Asymmetric-echo-based Ultrashort Echo-time (ASE-UTE) Imaging

Jinil Park1, Jeongtaek Lee1, and Jang-Yeon Park1,2

1Department of Biomedical Engineering, Sungkyunkwan University, Suwon, Republic of Korea, 2Center for Neuroscience Imaging Research, Institute for Basic Science, Suwon, Republic of Korea

The first 3D-UTE sequence used FID acquisition techniques using ramp sampling to minimize TE, but defining the center of k-space precisely was a difficult problem (true-k0). In case of echo acquisition containing echo peaks, it is better to define true-k0 than FID acquisition although true-k0 problem still exists because echo peaks often do not agree with true-k0 due to the echo shifts caused by system imperfections such as gradient delays and eddy currents. Here, we propose an asymmetric-echo-based 3D-UTE (ASE-UTE) sequence where echo peaks are acquired on the ramp.

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