Table 2.

Correlations of PFT parameters and ⁶⁸Ga-V/Q PET/CT functional volumes computed with the manual reference standard and the 15%max fixed threshold

	Reference standard [7]		15%max threshold
	%WL with normal ventilation	%WL with normal perfusion	%WL with normal ventilation	%WL with normal perfusion
FEV1/FVC	0.78*	0.81*	0.48*	0.46*
FEV1 (%pred)	0.61*	0.62*	0.24	0.25
DLCO (%pred)	0.43*	0.47*	− 0.07	0.00
FVC (%pred)	0.30	0.28	0.03	− 0.01

*indicates p value <0.05