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Figure 2 Example of short-axis tagged images during cardiac cycle. Typically, tagging is applied just before contraction starts (end diastole, A). Because the taglines are a temporary property of the tissue, taglines move along with the tissue in which they are created. The lines will deform if the myocardium contracts (B), and become undeformed during relaxation (C). Because of T1 relaxation, the contrast between tagged (dark) and nontagged (bright) myocardium will gradually disappear during subsequent image acquisition (D). LV = left ventricle; RV = right ventricle.