2.

不同时期病变CT表现

Chest CT findings of the lesions in the 4 stages (n, %)

CT findings (n=30)	Stage 1 (n=2)	Stage 2 (n=8)	Stage 3 (n=10)	Stage 4 (n=10)
GGO: Ground-glass opacities.
Involvement
Single	0 (0.00)	1 (12.50)	0 (0.00)	0 (0.00)
Bilateral	2(100.00)	7 (87.50)	10(100.00)	10(100.00)
Distribution
Peripheral	1 (50.00)	5 (62.50)	6 (60.00)	9 (90.00)
Central	0 (0.00)	0 (0.00)	0 (0.00)	0 (0.00)
Ccntral+periphcral	1 (50.00)	3 (37.50)	4 (40.00)	1 (10.00)
Density
GGO	1 (50.00)	1 (12.50)	2 (20.00)	2 (20.00)
Consolidation	0 (0.00)	1 (12.50)	5 (50.00)	2 (20.00)
Crazy-paving pattern	1 (50.00)	6 (75.()0)	3 (30.00)	6 (60.00)
Linear lesions	0 (0.00)	4 (50.00)	10(100.00)	10(100.00)