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Figure 2 Axial IR-EPI of a rat heart acquired at the same anatomical level but with different TI settings. After 1 h coronary occlusion and 24 h reperfusion, GdDTPA-albumin was administered; IR-EPI were acquired 4 min later. A strong negative signal was observed for blood and the entire myocardium with TI = 20 ms (top left panel). Nil signal was obtained for blood at TI = 70 ms from left ventricular blood (LV in top right panel), for normal myocardium at TI = 320 ms (arrowheads in lower left panel) and for reperfused infarction at TI = 470 ms (arrows in lower right panel). Regions with faster T1 relaxation, that is, greater Gadolinium concentration, exhibit nil signal at shortest TI setting. Thus, Gadolinium concentration in blood > in normal myocardium > in reperfused infarction at 4 min after administration.
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