Block regional interpolation scheme for k-space (BRISK): a rapid cardiac imaging technique.
We introduce an acquisition method, "block regional interpolation scheme for k-space" (BRISK), to reduce the acquisition time for cardiac imaging. The method exploits the high degree of correlation that exists between time-resolved cardiac images. For representative k-space data sets, Fourier analysis was applied along the cardiac phase dimension to reveal that different regions of k-space can be effectively sampled at different rates. A reduced sampling strategy was implemented, and unsampled points were generated by Fourier interpolation. Time savings of up to 75% are quite feasible and 25% BRISK scans compare well with 100% scans. Simulations and acquisitions using a normal volunteer and patients are presented.
Doyle
M
M
Department of Medicine, University of Alabama at Birmingham 35294-0012, USA.
Walsh
E G
EG
Blackwell
G G
GG
Pohost
G M
GM
D001022:Aortic Valve Insufficiency / Q000175:diagnosis; D001024:Aortic Valve Stenosis / Q000175:diagnosis; D017352:Echo-Planar Imaging / Q000379:methods / Q000706:statistics & numerical data; D005240:Feasibility Studies; D005583:Fourier Analysis; D006321:Heart / Q000033:anatomy & histology*; D006331:Heart Diseases / Q000175:diagnosis*; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000379:methods* / Q000706:statistics & numerical data; D015233:Models, Statistical; D013997:Time Factors