RAPID CARDIAC IMAGING WITH TURBO BRISK

A variety of variable and constant rate, sparse sampling strategies ha ve previously been proposed to rapidly image dynamically changing obje cts. The majority of these strategies compile a k-space data set for a ny given time point by substituting k-space data from the most recentl y sampled time positions (extracted from the sparsely sampled set), Th e BRISK technique, is a variable rate, sparse sampling technique which additionally incorporates an interpolation scheme to more accurately represent k-space data at positions which were not directly sampled, H ere, strategies are introduced that allow turbo concepts to be incorpo rated with BRISK, Simulations are conducted to compare the efficacy of the turbo BRISK acquisition and processing strategy against a constan t rate, sparse sampling strategy with direct substitution of the most recently acquired k-space lines. It is shown that turbo BRISK generate s images of similar quality in approximately half the time as the unif orm sampling rate, sparse sampling strategy. Data from turbo BRISK acq uisitions of multicardiac phase image sets, obtained on a normal volun teer and cardiac patients are presented.