Table 6. Doppler mode of the infra-popliteal arteries .
| Doppler mode | Frequency | |
| Intimal plaques of the infra-popliteal arteries | No plaque | 54 |
| Hypoechoic | 2 | |
| Hyperechoic | 1 | |
| Calcified | 43 | |
| Diameter stenosis of the posterior tibial arteries | Stenotic | 13 |
| Patent | 75 | |
| Occluded | 12 | |
| Diameter stenosis of the anterior tibial and dorsalis pedis arteries | Stenotic | 13 |
| Patent | 78 | |
| Occluded | 9 | |
| Spectral pattern of the posterior tibial arteries. | Triphasic (Normal) | 66 |
| Biphasic | 23 | |
| Monophasic | 5 | |
| No flow | 6 | |
| Spectral pattern of the anterior tibial and dorsalis pedis arteries | Triphasic (Normal) | 67 |
| Biphasic | 21 | |
| Monophasic | 9 | |
| No flow | 3 |