Table 4. Typical radiotherapy parameters for pelvic treatment sites.
| Tumour site | Patient position | Planning technique | Typical beam arrangement | Total dose (Gy) | Fraction size (Gy) | Approx field | Brachytherapy |
|---|---|---|---|---|---|---|---|
| Bladder | Supine | Conformal CT | Anterior | 64 | 2 | 10 × 10 | — |
| Opposed laterals | |||||||
| AP : PA : Lats | |||||||
| Prostate | Supine | Conformal CT | 3 field: | 64–70 | 2 | 9 × 9 | — |
| 2 phase | Anterior | ||||||
| Opposed laterals | 6 × 6 | ||||||
| 6 field: | ±boost to 74 | ||||||
| Laterals | |||||||
| Ant/post obliques | |||||||
| Testis | Supine | Simulated | AP:PA | 20–30 | 2 | 10 × 15–30 | |
| Bony anatomy | Para-aortic dogleg | ||||||
| Anal canal | Prone | Simulated | AP:PA | 45 | 1.8 | 15 × 20 | — |
| Bony anatomy | 3 field | 15 | |||||
| Direct electron implant | |||||||
| Rectum | Prone | Conformal CT | 3 field: | 45 | 1.8 | 17 × 17 | — |
| 2 phase | Post | 17 × 10 | |||||
| Opposed laterals | 5.4–9 | 1.8 | 10 × 10 | ||||
| Uterus | Supine | Simulated | 3 field: | 45 | 1.8 | 16 × 16 | Ir-192 |
| Bony anatomy | Anterior | HDR | |||||
| Opposed laterals | 8 Gy in two insertions at 0.5 cm | ||||||
| Vulva/vagina | Supine | Simulated | AP:PA | 45 | 1.8 | 15 × 20 | — |
| Bony anatomy | 3 field | ||||||
| Cervix | Supine | Simulated | 3 field: | 45–50.4 | 1.8 | 24 × 16 | Cs 137 |
| Bony anatomy | Anterior opposed laterals | LDR 22.5–27 Gy to point A |
HDR=high-dose rate; LDR=low-dose rate; AP=antero-posterior; PA=postero-anterior; CT=computer tomography; Cs=caesium.