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Abstract #3344

High efficiency Free-Breathing 3D Thoracic Aorta Imaging with Self-Navigated Image Reconstruction

Caiyun Shi1,2, Congcong Liu1, Shi Su1, Haifeng Wang1, Xin Liu1, Hairong Zheng1, Dong Liang1, and Yanjie Zhu1
1Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China, 2Shenzhen College of Advanced Technology, University of Chinese Academy of Sciences, Shenzhen, China

Self-gating techniques can be used to solve and compensate for cardiac or respiratory motion during MRI with free-breathing. In this work, a self-gating based motion correction scheme is proposed, and combined with a 3D variable-flip-angle TSE sequence for high-efficiency thoracic aorta imaging. Specifically, the slab-selective SPACE sequence is modified to acquire self-gating signals, which are used for detecting the respiratory motion. The image data is subsequently corrected based on the binning motion correction and image registration approach. The comparison was conducted on healthy volunteers and compared against a conventional diaphragmatic navigator-gated acquisition to assess the feasibility of the proposed scheme.

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