Abstract #3751

Real-Time Motion Correction in 2D Multi-Slice Imaging with Through-Plane Navigator

Wei Lin¹, Tim Nielsen², Qin Qin³,⁴, Stewart H. Mostofsky⁵, George Randy Duensing¹

¹Invivo Corporation, Philips Healthcare, Gainesville, FL, United States; ²Philips Research Europe, Hamburg, Germany; ³Radiology, The Johns Hopkins University, Baltimore, MD, United States; ⁴F.M. Kirby Research Center, Kennedy Krieger Institute, Baltimore, MD, United States; ⁵Neurology and Psychiatry, The Johns Hopkins University, Baltimore, MD, United States

A real-time strategy for 3D rigid-body motion correction in 2D multi-slice multi-shot MRI scans is proposed. Two through-plane navigator (tNav) echoes are collected on each imaging slice to derive two tNav projection images within each TR. Rotation/translation within each tNav image plane is detected using an image correlation measure. Rotation within the imaging plane is detected by replacing tNav with an orbital navigator on one slice. The proposed method does not introduce any additional 3D RF excitation, and does not require any additional hardware. The efficacy of the proposed method is demonstrated with in vivo brain studies.