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Abstract #4100

Half-echo respiratory navigator for motion suppressed 3D ultrashort echo time image for Lung imaging

Pan Ki Kim1,2,3, Young-Jung Yang4, Yoo Jin Hong4, Chul Hwan Park5, Dong Jin Im4, Donghyun Hong6, and Byoung Wook Choi4

1Radiology and Research Institute of Radiological Science, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea, Republic of, 2Center for NanoMedicine, Institute for Basic Science (IBS), Seoul, Korea, Republic of, 3Yonsei-IBS Institute, Yonsei University, Seoul, Korea, Republic of, 4Department of Radiology and Research Institute of Radiological Science, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea, Republic of, 5Department of Radiology and Research Institute of Radiological Science, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, Korea, Republic of, 6Erwin L. Hahn Institute for Magnetic Resonance Imaging, University of Duisburg-Essen, Essen, Germany

In this study, we proposed a new self-gating signal to obtain a high-resolution 3D lung UTE image with suppressed respiratory motion artifacts.This half-echo self-gating (HE-SG) signal can monitor the position of the diaphragm with high spatial and temporal resolution acquired for every TR without any increasing the scan time. Also, this HE-SG can automatically estimate the respiratory motion of the subject so that it can be reconstructed seamlessly for high-quality lung images or time-resolved lung images.

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