… we assessed the topographical distribution of pulmonary perfusion (Q) and ventilation (V) in
… In this technique, the intrapulmonary distribution of 13 N 2 , measured during a short apnea, …

… pulmonary emphysema appeared to change with the frequency of breathing (I), and the
possibility occurred to them that this phenomenon and the uneven ventilation … alveolar ventilation …

METHODS The basic Xe 133 technique for studying the regional distribution of gas in the
lungs has been fully described by Ball et al.(I). In the present study three scintillation counters …

… pulmonary function tests and by a radioactive xenon technique, while seated upright at rest,
to measure the regional ventilation and perfusion distribution … , the ventilation distribution as …

… and an intrapulmonary airway during single breath of 02. Slope of each expired plateau … to
the present study, previous investigators observed that the plateau recorded within pulmonary …

… “geometrical centre” of ventilation to quantify the changes in ventilation distribution occurring
in the dorsal-to-ventral direction. Further, fractional ventilation was determined in 64 ROIs in …

… capture the entire pulmonary ventilation distribution. Most methods have focused on quantifying
the ventilation defect percentage (VDP), the fraction of the lung with ventilation below an …

… distribution of pulmonary … Ventilation distribution during a vital capacityinspiration was similar
to that seen in young subjects. (c) In five of the six elderly subjects, however, the distribution …

… graphical distribution of pulmonary ventilation during spontaneous or artificial ventilation was
… understanding of the local distribution of inspired air in the lungs during various modes of …

… the distribution of inspired gas in the lung (Roussos et al., 1976a,b; Chevrolet et al., 1979).
In this paper we report studies on the regional distribution of lung volume and ventilation per …