Table 3.
Cavity visualization index (CVI) and variability of lumpectomy cavity and clinical target volumes with median value and range
| CVI | 1 | 2 | 3 | ρ value* |
|---|---|---|---|---|
| N | 4 | 10 | 6 | |
| COM shift of LC (cm) | 0.41 (0.29-0.46) | 0.26 (0.19-0.52) | 0.18 (0.12-0.26) | 0.004 |
| COM shift of CTV (cm) | 0.46 (0.37-0.62) | 0.35 (0.2-0.61) | 0.26 (0.17-0.32) | 0.019 |
| CIcommon LC | 0.48 (0.33-0.49) | 0.56 (0.40-0.66) | 0.61 (0.53-0.65) | 0.01 |
| CIcommon CTV | 0.50 (0.39-0.56) | 0.59 (0.45-0.70) | 0.65 (0.51-0.68) | 0.02 |
| CIgen LC | 0.69 (0.59-0.69) | 0.75 (0.64-0.81) | 0.78 (0.74-0.82) | 0.004 |
| CIgen CTV | 0.72 (0.65-0.75) | 0.78 (0.69-0.83) | 0.81 (0.73-0.83) | 0.018 |
| Vmax/Vmin (LC) | 1.42 (1.36-1.75) | 1.26 (1.10-1.73) | 1.19 (1.07-1.29) | 0.029 |
| Vmax/Vmin (CTV) | 1.57 (1.44-2.02) | 1.29 (1.14-1.68) | 1.20 (1.15-1.50) | 0.008 |
*
One-way ANOVA test
LC – lumpectomy cavity, CTV – clinical target volume, CIcommon – conformity index among all observers, CIgen – generalized conformity index for all observers, Vmax – maximum volume among observers, Vmin – minimum volume among observers