Figure 3
Precalculation of a golden-ratio based angular distribution to achieve a more uniform coverage of k-space with the projections selected for Cine reconstruction. Above: Expected time course of the cardiac signal, estimated from the average interval TRR. Below: Using θ0=0° as initial value, a list of projection angles was calculated by consecutively adding of the golden angle (Δ θ≈111.246°). Subsequently, the projections of the calculated angle list were sorted into N≈TRR/TR interleaved sublists (demonstrated for N=4 sublists). Each sublist consists of K≈nProj/N golden-ratio-distributed projections (shown for K=4). In case of a constant signal each projection of one sublist belongs to the same heart cycle phase, as shown for the systolic phase and the black projections.