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Time density curves of the same rat in Fig. 4 showing signal changes at specific regions over time. The same types of time density curves are measured on a pixel-by-pixel basis and are used to calculate the SVD-based flow metrics. AIF: Arterial input function; R.PA: Right pulmonary artery; L.PA: Left pulmonary artery; R.Lung: Right lung parenchyma; and L.Lung: Left lung parenchyma.
