Table II.
Mean and standard deviation of differences in DVH metrics between OCBCT/CCBCT and pCT among all plans of brain SRS (top) and pelvis cases (bottom). The p-value of t-test of DVH differences between OCBCT and CCBCT are also listed.
| Dmin | D10% | D50% | D95% | D99% | Dmean | Dmax | ||
|---|---|---|---|---|---|---|---|---|
| PTV | OCBCT | 0.193 ± 0. 172 |
0.232 ± 0. 174 |
0.211 ± 0. 141 |
0.200 ± 0. 120 |
0.202 ± 0. 118 |
0.209 ± 0. 142 |
0.310 ± 0.321 |
| CCBCT | 0.136 ± 0.210 |
0.134 ± 0.158 |
0.105 ± 0. 124 |
0.096 ± 0. 115 |
0.122 ± 0. 117 |
0.104 ± 0. 124 |
0.210 ± 0.255 |
|
| P-value | 0.318 | 0.986 | 0.518 | 0.638 | 0.431 | 0.757 | 0.547 | |
| Brain Stem | OCBCT | 0.007 ± 0.014 |
0.031 ± 0.059 |
0.016 ± 0.037 |
0.008 ± 0.013 |
0.016 ± 0.031 |
0.051 ± 0.069 |
|
| CCBCT | 0.001 ± 0.002 |
0.006 ± 0.008 |
0.004 ± 0.005 |
0.002 ± 0.002 |
0.003 ± 0.003 |
0.013 ± 0.013 |
||
| P-value | 0.679 | 0.285 | 0.46 | 0.694 | 0.383 | 0.088 | ||
| Optic Nerve | OCBCT | 0.02 ±0.042 |
0.022 ±0.048 |
0.024 ±0.047 |
0.02 ±0.042 |
0.023 ±0.046 |
0.033 ±0.062 |
|
| CCBCT | 0.005 ±0.011 |
0.012 ±0.030 |
0.009 ±0.020 |
0.005 ±0.010 |
0.009 ±0.020 |
0.017 ±0.040 |
||
| P-value | 0.661 | 0.46 | 0.424 | 0.58 | 0.385 | 0.256 | ||
| Chiasm | OCBCT | 0.016 ±0.030 |
0.026 ±0.055 |
0.024 ±0.048 |
0.021 ±0.037 |
0.024 ±0.047 |
0.039 ±0.072 |
|
| CCBCT | 0.003 ±0.004 |
0.004 ±0.005 |
0.003 ±0.004 |
0.002 ±0.003 |
0.003 ±0.004 |
0.009 ±0.011 |
||
| P-value | 0.645 | 0.303 | 0.304 | 0.539 | 0.338 | 0.476 |
| Dmin | D10% | D50% | D95% | Dmean | Dmax | ||
|---|---|---|---|---|---|---|---|
| PTV | OCBCT | 0.924 ± 0.724 |
0.918 ± 0.548 |
0.774 ± 0.493 |
0.66 ± 0.434 |
0.791 ± 0.491 |
1.53 ± 1.235 |
| CCBCT | 0.452 ± 0.476 |
0.297 ± 0.176 |
0.284 ± 0.153 |
0.237 ± 0.168 |
0.281 ± 0.150 |
0.602 ± 0.898 |
|
| P-value | 0.559 | 0.001 | 0.001 | 0.002 | 0.001 | 0.002 | |
| Bladder | OCBCT | 0.068 ± 0.081 |
0.797 ± 0.434 |
0.443 ± 0.419 |
0.138 ± 0.185 |
0.468 ± 0.346 |
1.172 ± 0.868 |
| CCBCT | 0.042 ± 0.074 |
0.332 ± 0.143 |
0.143 ± 0.111 |
0.044 ± 0.037 |
0.161 ± 0.093 |
0.459 ± 0.434 |
|
| P-value | 0.021 | 0.001 | 0.01 | 0.073 | 0.002 | 0.001 | |
| Rectum | OCBCT | 0.037 ± 0.041 |
1.085 ± 1.456 |
1.054 ± 1.073 |
0.178 ± 0.324 |
0.485 ± 0.585 |
1.641 ± 1.870 |
| CCBCT | 0.025 ± 0.035 |
0.52 ± 0.839 |
0.545 ± 0.976 |
0.035 ± 0.053 |
0.21 ± 0.282 |
0.896 ± 1.343 |
|
| P-value | 0.021 | 0.013 | 0.007 | 0.311 | 0.003 | 0.02 | |
| Femur | OCBCT | 0.025 ± 0.050 |
0.295 ± 0.211 |
0.065 ± 0.049 |
0.013 ± 0.017 |
0.181 ± 0.280 |
0.447 ± 0.293 |
| CCBCT | 0.021 ± 0.057 |
0.111 ± 0.080 |
0.055 ± 0.047 |
0.016 ± 0.023 |
0.129 ± 0.294 |
0.209 ± 0.182 |
|
| P-value | 0.096 | 0.004 | 0.006 | 0.784 | 0.004 | 0.001 |