Table 4.
Right lower lobe.
| Artery variants | Abbreviation | Frequency |
|---|---|---|
| Superior segment variants※ | ||
| RA6a+b, RA6c | 6% | |
| RA6a+c, RA6b | 36% | |
| RA6b+c, RA6a | 8% | |
| RA6a, RA6b, RA6c | 50% | |
| Basal segment variants | ||
| RA7+8+9, RA10 | 7+8+9, 10 | 1% |
| RA7+9+10, RA8 | 7+9+10, 8 | 2% |
| RA7+8b, RA8a+9+10 | 7+8, 8 + 9+10 | 2% |
| RA7+8, RA9+10 | 7+8, 9 + 10 | 6% |
| RA7+8b, RA8a+9b, RA9a+10 | 7+8, 8 + 9, 9 + 10 | 1% |
| RA7+8, RA9, RA10 | 7+8, 9, 10 | 1% |
| RA7, RA8+9, RA10 | 7, 8 + 9, 10 | 10% |
| RA7, RA8a+9+10, RA8b | 7, 8, 8 + 9+10 | 2% |
| RA7, RA8, RA9+10 | 7, 8, 9 + 10 | 53% |
| RA7+8b, RA8a, RA9a, RA9b+10 | 7+8, 8, 9, 9 + 10 | 1% |
| RA7, RA8+9b, RA9a+10 | 7, 8 + 9, 9 + 10 | 1% |
| RA7, RA8+9a, RA9b+10 | 7, 8 + 9, 9 + 10 | 1% |
| RA7, RA8, RA9a, RA9b+10 | 7, 8, 9, 9 + 10 | 4% |
| RA7, RA8, RA9, RA10 | 7, 8, 9, 10 | 4% |
| RA7, RA8b, RA8a+9, RA10 | 7, 8, 8 + 9, 10 | 3% |
| RA7a, RA8, RA7b+9+10 | 7, 8, 7 + 9+10 | 3% |
| RA7+9a, RA8, RA9b+10 | 7+9, 8, 9 + 10 | 1% |
| RA7a, RA7b+8b, RA8a, RA9+10 | 7, 7 + 8, 8, 9 + 10 | 1% |
| RA7, RA8a+9a, RA8b, RA9b+10 | 7, 8, 8 + 9, 9 + 10 | 1% |
| RA7, RA8a, RA8b+9, RA10 | 7, 8, 8 + 9, 10 | 1% |
| RA7, RA8, RA9+10b+c, RA10a | 7, 8, 9 + 10, 10 | 1% |
| RA7, RA8, RA9+10b+c, RA10a | 7, 8, 9 + 10, 10 | 1% |
| RA* | 7% | |
※ The first branching point of RA6.