Abstract #4238

Efficient imaging of Rabi modulated trajectories using balanced Steady-State Driven Trajectory (bSSDT) imaging

James C Korte¹, Bahman Tahayori^2,3, Peter M Farrell⁴, Yasmin Blunck¹, and Leigh A Johnston¹

¹Dept. Biomedical Engineering, University of Melbourne, Melbourne, Australia, ²Dept. Electrical and Computer Systems Engineering, Monash University, Melbourne, Australia, ³Dept. of Medical Physics and Biomedical Engineering, Shiraz University of Medical Sciences, Shiraz, Iran (Islamic Republic of), ⁴Dept. Electrical and Electronic Engineering, University of Melbourne, Melbourne, Australia

We propose an efficient technique to image localised steady-state trajectories, termed balanced Steady-State Driven Trajectory (bSSDT) imaging and implement the protocol to investigate the properties of Rabi modulated steady-state trajectories. In bSSDT imaging, a sequence of points on the voxel-wise steady-state trajectory is acquired. The resultant 4-D data offers a potentially rich source of information about the underlying tissue properties. The proposed imaging technique is a pseudo-continuous excitation version of balanced steady-state free precession (bSSFP) imaging, with relaxation of the magnetisation to the equilibrium steady-state in bSSFP replaced by control of the magnetisation to a steady-state trajectory in bSSDT.

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