Table 2.
Association between detection of feeding arteries and lesion size and type categories and image quality
| True positive | False Positive | True Negative | False Negative | |||||
|---|---|---|---|---|---|---|---|---|
| 3D | DSA | 3D | DSA | 3D | DSA | 3D | DSA | |
| Observer1 | ||||||||
| ≤ 2 cm | 36(87.8%) | 18(43.9%) | 0 | 0 | 1(2.4%) | 1(2.4%) | 4(9.8%) | 22(53.7%) |
| > 2 cm | 123(85.4%) | 121(84%) | 4(2.8%) | 5(3.5%) | 7(4.9%) | 6(4.2%) | 10(6.9%) | 12(8.3%) |
| Observer2 | ||||||||
| ≤ 2 cm | 35(85.4%) | 18 (43.9%) | 0 | 1(2.4%) | 1(2.4%) | 0 | 5(12.2%) | 22(53.7%) |
| > 2 cm | 122(84.7%) | 118(81.9%) | 3(2.1%) | 4(2.8%) | 8(5.6%) | 7(4.9%) | 11(7.6%) | 15(10.4%) |
| 3D | DSA | 3D | DSA | 3D | DSA | 3D | DSA | |
| Observer1 | ||||||||
| Capsule | 150(88.2%) | 126(74.1%) | 4(2.4%) | 5(2.9%) | 7(4.1%) | 6(3.5%) | 9(5.3%) | 33(19.4%) |
| Diffuse | 9(60%) | 13(86.7%) | 0 | 0 | 1(6.7%) | 1(6.7%) | 5(33.3%) | 1(6.7%) |
| Observer2 | ||||||||
| Capsule | 149(87.6%) | 123(72.4%) | 3(1.8%) | 5(2.9%) | 8(4.7%) | 6(3.5%) | 10(5.9%) | 36(21.2%) |
| Diffuse | 8(53.3%) | 13(86.7%) | 0 | 0 | 1(6.7%) | 1(6.7%) | 6(40%) | 1(6.7%) |
| 3D | DSA | 3D | DSA | 3D | DSA | 3D | DSA | |
| Observer1 | ||||||||
| Subseg. | 109(87.2%) | 112(74.2%) | 4(3.2%) | 5(3.3%) | 6(4.8%) | 7(4.6%) | 6(4.8%) | 27(17.9%) |
| Segment | 50(87.7%) | 26(78.8% | 0 | 0 | 2(3.5%) | 0 | 5(8.8%) | 7(21.2%) |
| Lobar | 0 | 1(100%) | 0 | 0 | 0 | 0 | 3(100%) | 0 |
| Observer2 | ||||||||
| Subseg. | 107(85.6%) | 109(72.2%) | 3(2.4%) | 5(3.3%) | 7(5.6%) | 7(4.6%) | 8(6.4%) | 30(19.9%) |
| Segment | 50(87.7%) | 26(78.8%) | 0 | 0 | 2(3.5%) | 0 | 5(8.8%) | 7(21.2%) |
| Lobar | 0 | 1(100%) | 0 | 0 | 0 | 0 | 3(100%) | 0 |
Bold numbers are values with statistically significant difference, P < 0.05