Figure 2From: Pulmonary blood volume indexed to lung volume is reduced in newly diagnosed systemic sclerosis compared to normals – a prospective clinical cardiovascular magnetic resonance study addressing pulmonary vascular changesMeasurement of the pulmonary transit time (PTT). The plot shows signal intensity (in arbitrary units, a.u.) over time for regions of interest in the pulmonary trunk (red) and the left atrium (blue), respectively. The black dotted vertical lines indicate the center of gravity for the respective curve. The double-headed arrow indicates the PTT.Back to article page