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FIGURE 7. Regional distribution of fractional PBF in healthy (normal) subjects and patients with pulmonary edema (ALI and non-ALI) versus LWC. Data represent combination of data from Figures 4 and 6. Each symbol represents 1 image bin. For clarity of presentation, only mean values are shown. Rightward shift of curves from pulmonary edema patients represents increase in LWC (i.e., pulmonary edema). However, PBF distributions within each LWC distribution are nearly identical (i.e., there is no perfusion redistribution in patients with pulmonary edema compared with pattern seen in healthy subjects).
