Table 3.
Mean, standard deviation, and range of volumes of target and organ at risks contoured on both pre‐ and post‐SpaceOAR© hydrogel computerized tomography dataset
| Structure | Prgel volume (cc) | Postgel volume (cc) | P‐value |
|---|---|---|---|
| CTV | 34 ± 7 (25–46) | 35 ± 8 (24–49) | 0.04 |
| PTV | 96 ± 14 (78–120) | 102 ± 15 (81–128) | 0.006 |
| SpaceOAR gel | – | 11 ± 2 (8–12) | – |
| Bladder | 327 ± 197 (154–827) | 286 ± 88 (152–431) | 0.77 |
| Bladder wall | 73 ± 28 (44–144) | 66 ± 13 (43–91) | 0.42 |
| Penile bulb | 3 ± 1 (1–4) | 2 ± 1 (1–4) | 0.60 |
| Rectum | 85 ± 35 (45–150) | 77 ± 18 (46–103) | 0.35 |
| Rectum wall | 36 ± 9 (23–56) | 36 ± 5 (28–45) | 0.65 |
| Composite rectum | – | 87 ± 19 (58–117) | – |
| Composite rectum wall | – | 40 ± 5 (31–47) | – |
CTV: clinical target volume; PTV: planning target volume.
Bold values indicate statistical significance below the threshhold of P < 0.01.