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FIGURE 3. IDIF left ventricle of a patient without myocardial uptake of 18F-FDG (A) and a patient with high myocardial uptake of 18F-FDG (B) plotted against arterially sampled input functions derived from same dynamic dataset. In A, only partial-volume effect affects IDIF. All time points are lower, but IDIF curve stays isomorphic to arterial-sampling curve. In B, trapping of 18F-FDG is predominant. Curves stay isomorphic until time at which trapping cannot be neglected and IDIF values start to exceed arterial-sampling values.
