Comparison of the freehand technique with the stereotactic device technique
| Variable | Freehand | Stereotactic Device |
|---|---|---|
| No. of patients | 8 | 8 |
| Skin entry-point verification (min) | 17.5 | 4 |
| Sterile setup time (min) | 24.9 | 13 |
| Needle aligned with vector (min) | 27.6 | 18.8 |
| Needle in target (min) | 36.9 | 25.3 |
| Total no. of images | 14 | 7.9 |
| Distance of skin entry point (mm) | 4.5 | 0 |
| Distance off target (mm) | 4.8 | 1.6 |
| Depth to target (mm) | 79.8 | 73.1 |