REDUCED CIRCULAR FIELD-OF-VIEW IMAGING

A rapid dynamic imaging technique based on polar k-space sampling is p resented. A gain in temporal resolution is achieved by angular undersa mpling. A detailed analysis of the point spread function of angular un dersampled polar imaging reveals a reduced diameter of the correspondi ng circular field of view. Under the assumption that dynamic changes a re restricted to a local circular field of view, angular undersampled dynamic imaging allows the recording of rapid changes at high temporal and spatial resolution. The theoretical and experimental details of t he technique are presented.