Figure 1

In the ROtating Cartesian Kspace pattern (a), kykz views of 3D Cartesian grid are reordered in a quasi-spiral manner with each arm starts from the outer, ends at the center kspace and rotates using segmented golden angle [Han et al, MRM2015]. The time series of SI projection from SG signal on static phantom (b) shows that the inward quasi-spiral arm could significantly reduce the eddy-current interference on self-gating signal because an adjacent kspace line is acquired in previous TR instead of a huge kspace jump in the case of outward arm. The kykz sampling pattern of segGA, due to the extra degree of randomness, is much uniform than that of GA (c), both after a retrospective data sorting using recorded ECG and respiratory signal in previous patient scan. (segGR: segmented golden ratio; GA: golden angle of 137.5°)