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FIGURE 6. Regional distribution of fractional PBF in healthy (normal) subjects and patients with pulmonary edema (ALI and Non-ALI). Data are taken from PET images after sorting picture elements (pixels) into bins along ventral-to-dorsal axis. PBF data have been normalized for differences in cardiac output among individuals by dividing value for PBF in each pixel by mean PBF for same tomographic slice. For clarity of presentation, only mean values for PBF in pulmonary edema patients are shown. These values lie within ±1 SD of comparable values for healthy subjects (i.e., on average, distributions are not significantly different).
