Fig 3. Regional time delays of 7 regions of interest (ROI) to evaluate filling time and inflation period.
Filling times were normalised by inspiration time; inflation periods were normalised by total breath length. Curves for both variables were normalized by the amplitude. ROIs were defined as 3 dorsal (1dors, 2dors 3dors), one middle (4mid) and 3 ventral (5vent, 6vent, 7vent) ROI distributed evenly over the total height of the lung field. Figure illustrates examples from representative horse at baseline and 1 hour after recovery from anaesthesia.