Table S1. Results of spearman correlation between visual emphysema score of all readers and calculated emphysema amount.

Image-type	Location	Spearman ρ	P value
Axial	1	0.48	<0.001
Axial	2	0.18	0.194
Axial	3	0.39	<0.001
MPR	1	0.45	<0.001
MPR	2	0.15	0.596
MPR	3	0.40	<0.001
CC	1	0.39	<0.001
CC	2	0.15	0.679
CC	3	0.40	<0.001

MPR, multiplanar reconstruction; CC, colour-coded; 1, upper zone; 2 middle zone; 3, lower zone.