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Axial slice and reformatted images of the whole-heart coronary MRI from one subject showing the right coronary artery (RCA), left anterior descending (LAD), and left circumflex (LCX) using the pencil-beam navigator with the subject-specific tracking factor (0.4) and fixed tracking factor (0.6), respectively. The Soap-bubble tool (36) was used to generate the reformatted images.
