Table 1.
Results for inter-observer variation in contouring. The difference in mean generalized conformity index (CIgen) between the CT and MRI based contouring was statistically significant (p = 0.007)
| Case | CT | MRI | ||||
|---|---|---|---|---|---|---|
| Mean V [cm3] (SD) | CoV [%] | CIgen | Mean V [cm3] (SD) | CoV [%] | CIgen | |
| 1 | 198 (10) | 5 | 0.85 | 106 (4) | 4 | 0.87 |
| 2 | 241 (37.5) | 16 | 0.69 | 256 (28) | 11 | 0.77 |
| 3 | 108 (20.7) | 19 | 0.56 | 125 (10) | 8 | 0.75 |
| 4 | 75 (18.1) | 24 | 0.64 | 92 (12) | 13 | 0.69 |
| 5 | 175 (47.9) | 27 | 0.46 | 217 (68) | 31 | 0.63 |
| 6 | 140 (10.1) | 7 | 0.76 | 125 (14) | 11 | 0.76 |
| 7 | 103(39.7) | 39 | 0.48 | 64 (2) | 4 | 0.66 |
| 8 | 180 (22.5) | 12 | 0.79 | 158 (14) | 9 | 0.8 |
| 9 | 135 (19.8) | 15 | 0.77 | 126 (20) | 16 | 0.71 |
| 10 | 204 (44.3) | 22 | 0.68 | 215 (19) | 9 | 0.76 |
| 11 | 99 (14.4) | 15 | 0.66 | 135 (11) | 8 | 0.79 |
| 12 | 195 (27.3) | 14 | 0.69 | 210 (29) | 14 | 0.74 |
| MEAN (SD) | 154 (26) | 18 | 0.67 (0.12) | 152 (19) | 12 | 0.74 (0.07) |
CoV = Coefficient of Variance; CTVLC = Clinical Target Volume of Lumpectomy Cavity; SD = Standard Deviation