1. A method for identifying one or more periods of minimal motion, comprising the steps of: acquiring at least one set of non-electrical data representative of cardiac motion and one or more sets of data representative of respiratory motion; generating a set of multi-input motion data comprising the set non-electrical data representative of cardiac motion and the one or more sets of motion data representative of respiratory motion; and extracting one or more periods of minimal motion for one of a heart and a respiratory organ from the set of multi-input motion data.