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Clinical target volume (CTV) to planning target volume (PTV) margin expansions
| CTV1 → PTV1 (whole bladder) | CTV2 → PTV2 (pelvic lymph nodes) | CTV3 → PTV3 (bladder tumour bed) | CTV4 → PTV4 (involved pelvic lymph nodes) | |
|---|---|---|---|---|
| Anterior | 1.5 cm | 0.5 cm | 1.0 cm | 0.5 cm |
| Posterior | 1.0 cm | 0.5 cm | 1.0 cm | 0.5 cm |
| Lateral | 0.5 cm | 0.5 cm | 1.0 cm | 0.5 cm |
| Superior | 1.5 cm | 0.5 cm | 1.0 cm | 0.5 cm |
| Inferior | 0.5 cm | 0.5 cm | 1.0 cm | 0.5 cm |
