Table 1 Characteristics of Patients and Targeted Lesions (n = 149)

 Age

  yrs. median (range)

70 (32–86)

 Gender

  Male, number (%)

86 (57.7 %)

  Female, number (%)

63 (42.3 %)

Variable (lesions)

 Size of the lesion (diameter)

  mm, median (range)

19.6 (7.5–29.7)

 Location of the lesions

  Upper lobe

77 (51.7 %)

  Lingular lobe or middle lobe

19 (12.8 %)

  Superior segment of the lower lobe

17 (11.3 %)

  Lower lobe (except for superior segment)

36 (24.2 %)

 Chest X-ray findings of the lesions

  Clearly visible

77 (51.7 %)

  Vague or invisible

72 (48.3 %)

 Thin slice CT features

  GGO

21 (14.1 %)

  Solid

128 (85.9 %)

 Number of the branch reach to the lesion

  mean

5.03

  3

12 (7.9 %)

  4

32 (21.5 %)

  5

55 (36.9 %)

  6

35 (23.6 %)

  7

12 (8.1 %)

  8

3 (2.0 %)

 CT bronchus sign ^a

  A

86 (57.8 %)

  B

49 (32.9 %)

  C

14 (9.3 %)