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Internal target volume margins for female patients
| Upper (cm) | Mid (cm) | Lower (cm) | |
|---|---|---|---|
| Direction | n = 10 | n = 16 | n = 16 |
| Anterior | 1.93 | 1.69 | 1.57 |
| Posterior | 2.11 | 0.94 | 1.41 |
| Left | 1.44 | 1.47 | 1.04 |
| Right | 2.10 | 1.62 | 1.23 |
Internal target volume margins based on our data are nonisotropic and vary per segment of rectum and sex.
