This review provides an overview of the relationship between ventilation/perfusion ratios
and gas exchange in the lung, emphasising basic concepts and relating them to clinical …

The prone posture is known to have numerous effects on gas exchange, both under normal
conditions and in patients with ARDS. Clinical studies have consistently demonstrated …

Background Among the modalities for lung imaging, proton magnetic resonance imaging
(MRI) has been the latest to be introduced into clinical practice. Its value to replace X-ray …

The gravitational gradient of intrapleural pressure is suggested to be less in prone posture
than supine. Thus the gravitational distribution of ventilation is expected to be more uniform …

From the first measurements of the distribution of pulmonary blood flow using radioactive
tracers by West and colleagues (J Clin Invest 40: 1–12, 1961) allowing gravitational …

The need for airway imaging is defined by the limited sensitivity of common clinical tests like
spirometry, lung diffusion (DLCO) and blood gas analysis to early changes of peripheral …

The field of proton lung MRI is advancing on a variety of fronts. In the realm of functional
imaging, it is now possible to use arterial spin labeling (ASL) and oxygen‐enhanced …

With increasing spatial resolution of regional ventilation and perfusion, it has become more
apparent that ventilation and blood flow are quite heterogeneous in the lung. A number of …

The pulmonary circulation is a low-pressure, low-resistance circuit whose primary function is
to deliver deoxygenated blood to, and oxygenated blood from, the pulmonary capillary bed …

Gas exchange in the lung depends on tidal breathing, which brings new oxygen to and
removes carbon dioxide from alveolar gas. This maintains alveolar partial pressures that …