Borjan Gagoski1, Berkin Bilgic1, Trina Kok1, Elfar Adalsteinsson1, 2
1Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, United States; 24Harvard-MIT Division of Health Sciences and Technology, MIT, Cambridge, MA, United States
The goal of this work is to reduce the acquisition times of the spiral CSI readouts by combining its concepts with compress sensing (CS). We perform random undersampling along the kf axis, by playing spiral k-space trajectories of different durations repeatedly during the long acquisition window. It is shown that for a given voxel size and spectral BW, the combined spiral-CS CSI provided equivalent spectral quality, and a decrease in acquisition times by a factor of 3 when compared to the original spiral CSI encoding. The feasibility of the methods was tested in vivo on a 3T Siemens scanner.
Keywords