Abstract #4100

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

Pan Ki Kim^1,2,3, 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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