Figure 1.

Flowchart of the proposed CRUISE gating algorithm. During the first half of the scan, CMRA k‐space is completely filled, and the corresponding iNAV FH values are used to populate a sorted list. Motion values in the sorted list are ordered such that ascending FH values are associated with a more end‐expiratory position. In the second half of the scan, the k‐space segment associated with the most inspiratory iNAV is re‐measured, and the new iNAV position is added to the sorted list if it is above the temporary gating threshold, which is defined by the most inspiratory iNAV position in the sorted list.

CMRA, coronary MR angiography; CRUISE, Constant Respiratory efficiency UsIng Single End‐expiratory threshold; FH, foot–head; iNAV, image‐based navigator; LR, left–right.