Table 1.
Cumulative DVH indices, normalized to the prescription BED. BED30 and BED3 corresponds to normalized BED at 30% and 3%, respectively, of the organ volume. VOLX is a fraction of prostate volume that is covered by a BED isoline of X% of the prescription BED. Errors represent standard error over patients, except for cIMRT-U, where two errors are shown. The first error is average end point change for one sigma envelope of DVHs, and the second error, in parenthesis, is standard error over patients for unmodified DVHs.
| Organ | Volume (cm3) | Index | Modality | |||
|---|---|---|---|---|---|---|
| HDR | igIMRT | cIMRT-S | cIMRT-U | |||
| Rectum | 96±41 | BED30 | 0.16±0.08 | 0.34±0.08 | 0.46±0.09 | 0.45±0.05±(0.07) |
| BED3 | 0.66±0.04 | 0.73±0.27 | 0.9±0.2 | 0.88±0.1±(0.3) | ||
| Bladder | 117±78 | BED30 | 0.11±0.03 | 0.17±0.07 | 0.4±0.2 | 0.4±0.1±(0.2) |
| BED3 | 0.37±0.15 | 0.74±0.27 | 1.0±0.2 | 0.95±0.1±(0.2) | ||
| Urethra | 4.5±1.9 | BED30 | 1.67±0.14 | 1.03±0.03 | 1.08±0.02 | 1.08±0.01±(0.02) |
| BED3 | 2.0±0.1 | 1.05±0.03 | 1.1±0.03 | 1.1±0.01±(0.03) | ||
| CTV (prostate) | 33±7 | VOL98 | 0.94±0.03 | 0.99±0.02 | 1.0±0.0 | 1.0±0.0±(0.0) |
| VOL110 | 0.9±0.04 | 0.07±0.08 | 0.42±0.29 | 0.42±0.1±(0.30) | ||
| VOL125 | 0.83±0.04 | 0.0 | 0.0 | 0.0 | ||
| VOL150 | 0.74±0.06 | 0.0 | 0.0 | 0.0 | ||