Zhaoyang Fan1,2, Sven Zuehlsdorff3, Peng Lai4, YiuCho Chung3, Jose Agraz1,2, Debiao Li1,2
1Radiology, Northwestern University, Chicago, IL, United States; 2Biomedical Engineering, Northwestern University, Evanston, IL, United States; 3Cardiac MR R&D, Siemens Healthcare, Chicago, IL, United States; 4Applied Science Laboratory, GE Healthcare, Menlo Park, CA, United States
Self-gating technique has recently been used in a 3D variable-flip-angle TSE sequence to exclude data acquired during swallowing, yet two shortcomings remain. First, a single self-gating (SG) line acquired immediately before readout in each TR may not be adequate to detect motion if the readout duration is considerably long. Second, real-time update of the reference line used for the cross-correlation analysis is necessary given potentially involuntary drift during 3D imaging. This work demonstrated that two SG lines, acquired immediately before and after readout during each TR, in combination with real-time update of the reference line make swallowing-motion gating more robust.