Emission tomography provides three-dimensional, quantitative images of the distribution of
radiotracers used to mark physiological, metabolic, or pathological processes. Quantitative …

Positron emission tomography (PET) provides three-dimensional images of the distributions
of radionuclides that have been inhaled or injected into the lungs. By using radionuclides …

Using positron emission tomography (PET) and intravenously injected 13N2, we assessed
the topographical distribution of pulmonary perfusion (Q˙) and ventilation (V˙) in six healthy …

The topographic matching of alveolar ventilation (V̇ A) and perfusion (Q̇) is the main
determinant of gas exchange efficiency of the lung. However, no pulmonary functional …

Multiple thoracic imaging modalities have been developed to link structure to function in the
diagnosis and monitoring of lung disease. Volumetric computed tomography (CT) renders …

Treppo, Steven, Srboljub M. Mijailovich, and José G. Venegas. Contributions of pulmonary
perfusion and ventilation to heterogeneity in V˙ a/Q˙ measured by PET. J. Appl. Physiol. 82 …

Alveolar ventilation/perfusion ratio (VA/Q) is a key parameter in functional imaging of the
lung. Herein, regional VA/Q was calculated from regional values of alveolar partial pressure …

Abstract Ventilation-perfusion (VA/Q) matching, the regional matching of the flow of fresh gas
to flow of deoxygenated capillary blood, is the most important mechanism affecting the …

Background Previous studies have suggested that pulmonary embolism (PE) and
pulmonary artery occlusion result in a shift in alveolar ventilation away from unperfused …

During a severe local or systemic inflammatory response, immune mediators target lung
tissue. This process may lead to acute lung injury and impaired diffusion of gas molecules …