Table 4 CT values of the entire lesion (HU) for adenocarcinoma in situ (AIS) and minimally invasive adenocarcinoma (MIA)

CT value of entire lesion

 Adenocarcinoma in situ (AIS) (n = 7)

− 612 ± 87

− 596 ± 62

 Minimally invasive adenocarcinoma (MIA) (n = 20)

− 510 ± 100

− 594 ± 84

 p-values

p = 0.018*

p = 0.901

Longest diameter of the entire lesion (mm) on CT image

 Adenocarcinoma in situ (AIS) (n = 7)

12.6 ± 5.8

17.0 ± 3.4

 Minimally invasive adenocarcinoma (MIA) (n = 20)

15.3 ± 4.2

17.2 ± 4.3

 p-values

p = 0.16

p = 1.000

Longest diameter of solid/invasive component (mm) on CT image

 Adenocarcinoma in situ (AIS) (n = 7)

0.2 ± 0.4

1.7 ± 2.7

 Minimally invasive adenocarcinoma (MIA) (n = 20)

2.9 ± 2.8

2.6 ± 3.0

 p-values

p = 0.012*

p = 0.547