Sub-segment | S1 + 2a | S1 + 2b | S1 + 2c | S3a | S3b | S3c | S4a | S4b | S5a | S5b | LLL | Total |
---|
V1l | | | | 55 | | | | | | | | 55 |
| | | Y | | | | | | | | |
S1 + 2a | 38 | 92 | 17 | 6 | 8 | 83 | 2 | 0 | 0 | 0 | | 246 |
B,Y | B,Y,A,N | | | B | Y,A,N | | | | | | |
S1 + 2b | | 21 | 92 | 3 | 0 | 2 | 0 | 1 | 0 | 0 | | 119 |
| | B,Y,A,N | | | | | | | | | |
S1 + 2c | | | 17 | 41 | 1 | 1 | 57 | 2 | 1 | 0 | 3 | 123 |
| | | B,A,N | | | | | | | | |
S3a | | | | 4 | 39 | 8 | 48 | 14 | 2 | 0 | 2 | 117 |
| | | | Y,N | | B,A | B | | | | |
S3b | | | | | 11 | 85 | 16 | 66 | 24 | 0 | | 202 |
| | | | B | Y,A,N | N | Y,A | | | | |
S3c | | | | | | 14 | 1 | 3 | 1 | 0 | | 19 |
S4a | | | | | | | 5 | 46 | 37 | 7 | 3 | 98 |
| | | | | | | Y,N | Y,A | B | | |
S4b | | | | | | | | 22 | 73 | 9 | 1 | 105 |
| | | | | | | | B,Y,A,N | B | | |
S5a | | | | | | | | | 6 | 52 | 0 | 58 |
| | | | | | | | | Y,A,N | | |
S5b | | | | | | | | | | 3 | 1 | 4 |
Total | 38 | 113 | 126 | 109 | 59 | 193 | 129 | 154 | 144 | 71 | 10 | 1146 |
- V1l: l means lateral and was separately counted, because this subsegmental pulmonary vein courses between the region involving S1 + 2 a, b, and c, and S3a. The sites of segmental veins are marked with the nomenclature systems proposed by Boyden (B), Yamashita (Y), Arai (A), and Nomori and Okada (N). The abbreviation “S1 + 2” indicates the apicoposterior segment; “a”, apical; “b” subapical posterior; “c”, horizontal. “S3” indicates the anterior segment; “a”, lateral; “b”, medial; “c”, superior. “S4” indicates the lingular superior segment; “a”, lateral; “b”, anterior. “S5” indicates the lingular; “a”, superior; “b”, inferior. LLL indicates the left lower lobe