Table 2.

MRI slice selection strategy; the number of slice locations and scans for ASL and proton density imaging at different lung volumes

Lung volume	ASL	Proton density	Resultant DNP	Measurement slice location
FRC	9 slices	9 slices	9 slices	The centre of 9 slices (5th slice)
	9 scans	3 scans
FRC + 500 ml & +1.0 litre	5 slices	9 slices	5 slices	Deformed within a 3D volume
	5 scans	3 scans

The number of scans corresponds to the minimum number to obtain 3D volumetric lung data at each lung volume. ASL, arterial spin Labelling. DNP, density normalized perfusion.