3D Magnetization-Prepared Imaging and Fat/Water Separation Using a Stack-Of-Rings Trajectory

Holden H. Wu¹, Jin Hyung Lee¹, Dwight G. Nishimura¹

In this work, we extend the 2D concentric rings k-space trajectory to a 3D stack-of-rings acquisition for volumetric spatial coverage. The 3D stack-of-rings trajectory inherits the desirable properties of the 2D concentric rings and offers even more flexibility in designing efficient magnetization-prepared imaging sequences. In addition, the unique circularly-symmetric sampling nature of the rings enables a time-efficient retracing acquisition for fat/water separation to ensure the robustness of this 3D non-Cartesian trajectory to off-resonance effects. Experimental results are shown for the case of magnetization-prepared imaging of the human brain.