Table 2. Tumor size and distances (n=221).
| Characteristics | Mean ± SD | Median [25–75% quartile] | Min | Max |
|---|---|---|---|---|
| Skin-chest wall distance (mm) | 19.8±1.2 | 19.8 [18.9–20.5] | 17 | 23.4 |
| Skin-tumor edge distance (mm) | 37.2±11.4 | 38 [29–46] | 17 | 63.2 |
| Chest wall-tumor edge distance (mm) | 17.5±11.3 | 18.5 [10.7–26.4] | 0 | 44.3 |
| Needle insertion range (mm) | 57.4±8.8 | 57.6 [51–62] | 30 | 92.7 |
| Chest wall-tumor center distance (mm) | 36.6±8.7 | 37.7 [30.8–42] | 9.6 | 71.5 |
| Tumor size (mm3) | 101.5±338.6 | 21 [3.1–71.2] | 10 | 325 |
Skin-chest wall distance: the distance from the skin to the chest wall, skin-tumor edge distance: the distance from the chest wall to the edge of the tumor, chest wall-tumor edge distance: the distance from the chest wall to the tumor edge, chest wall-tumor center distance: the distance from the chest wall to the tumor center. All the distances were measured at the section where the tumor is at largest size. SD, standard deviation.