Aim Specific ventilation (SV), the ratio of fresh gas entering a lung region to end-expiratory
volume, is a measure of regional ventilation. We have recently published (J Appl Physiol …

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 …

Specific ventilation imaging (SVI) is a functional magnetic resonance imaging technique
capable of quantifying specific ventilation―the ratio of the fresh gas entering a lung region …

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 …

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 …

Gas imaging has opened the new field of direct imaging of pulmonary ventilation by MRI.
The use of hyperpolarised 3 He gas for MRI of the lung has been pioneered by a number of …

The direct visual assessment of the lung parenchyma and of lung ventilation using proton
MRI is considerably more difficult than MRI of most other organs due to the very low signal …

62 Specific Ventilation (SV) is the ratio of the amount of fresh gas reaching a lung 63 unit to
the pre-inspiratory volume of that unit (essentially the tidal volume to functional 64 residual …

Introduction: In comparison to other imaging modalities, quantitative functional MRI is
relatively new and has undergone limited validation. We present preliminary results …

Gas exchange is the primary and most important function of the lung. In order for this
process to occur efficiently, there must be a balance between ventilation and perfusion …