Figure 3.

Complex signal tuning scheme. Four representative phase rotations for a chosen coil [Coil 3] are depicted. In (a), the x-axis, the y-axis and the color-axis represent time, navigator axis, and the signal intensity of $A_{i,m}$, respectively. The derived unfiltered respiratory curves $r_{i,m}\left[n\right]$ [overlaid curves in (a)] are also provided. The frequency spectra and their corresponding temporospectral quality metric values for the four representative phase rotations are shown in (b) and (c), respectively. In this example, the optimal phase rotation angle, which provided the highest temporospectral quality metric value, was found to be 259.2°.