High-resolution measurements of pulmonary perfusion reveal substantial spatial
heterogeneity that is fractally distributed. This observation led to the hypothesis that the …

Both regional ventilation and regional perfusion demonstrate progressive increases in
heterogeneity as the resolution of measurement is improved. Because the efficiency of …

The spatial distribution of pulmonary blood flow is increasingly heterogeneous as
progressively smaller lung regions are examined. To determine the extent of perfusion …

The heterogeneity of pulmonary blood flow was examined using a fractal analytic procedure,
and the results were compared with the traditional gravitational model of flow distribution …

Systematically mapped samples cut from lungs previously labeled with intravascular and
aerosol microspheres can be used to create high-resolution maps of regional perfusion and …

Like other organs that exchange substantial quantities of material with blood, the lung
accommodates a large two-dimensional surface in a component three-dimensional volume …

The spatial heterogeneity of pulmonary blood flow can be described by the relative
dispersion (RD) of weight-flow histograms (RD= SD/mean). Glenny and Robertson (J. Appl …

This study investigates temporal changes in regional pulmonary perfusion. Five dogs were
studied with five or six different radiolabeled microspheres being injected via a central vein …

We assessed the heterogeneity of regional pulmonary blood flow (PBFr), using radioactive
microspheres in five unanesthetized dogs standing at rest (Rest), standing at a 45 degrees …

Despite the heterogeneous distribution of pulmonary blood flow, perfusion appears to be
spatially ordered, with neighboring regions of lung having similar magnitudes of flow. This …