Specific ventilation (SV) is the ratio of fresh gas entering a lung region divided by its end-
expiratory volume. To quantify the vertical (gravitationally dependent) gradient of SV in eight …

Specific ventilation imaging (SVI) uses proton MRI to quantitatively map the distribution of
specific ventilation (SV) in the human lung, using inhaled oxygen as a contrast agent. To …

We have developed a novel functional proton magnetic resonance imaging (MRI) technique
to measure regional ventilation-perfusion (V̇A/Q̇) ratio in the lung. We conducted a …

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 …

A recently developed method for quantitative assessment of regional lung ventilation was
employed for the study of posture-dependent ventilation differences in rats. The …

This review presents an overview of some recent magnetic resonance imaging (MRI)
techniques for measuring aspects of local physiology in the lung. MRI is noninvasive …

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 …

The purpose of this work was to assess the reproducibility of percentage of ventilated lung
volume (PV) measured from hyperpolarized (HP) 3He and 1H anatomical images acquired …

Although some central aspects of pulmonary function (ventilation and perfusion) are known
to be heterogeneous, the distribution of diffusive gas exchange remains poorly …

Purpose To investigate the optimal oxygen flow rate for oxygen‐enhanced MR ventilation
imaging. Materials and Methods Using a cardiac‐triggered nonselective inversion recovery …