Table 1 Critical structure contouring guidelines
Structure name | Description |
|---|---|
Rectal Wall | Contour as a 3 mm thick wall structure from recto-sigmoid junction to lower aspect of ischial tuberosities. |
Rectal Mucosa | Solid structure corresponding to the internal cylindrical space central to the inner surface of the rectal wall. |
Rectum Posterior Wall | This is the most posterior 15 mm of rectal wall |
Bladder | Contour the whole organ as a solid structure. |
Penile Bulb | Contour from MRI. |
Prostatic urethra Planning Target at Risk Volume (PRV) | Contour urinary IDC within prostate, and add 1 mm radial expansion for the PRV. If no IDC used, estimate urethral position, and add 3 mm radial expansion. |
Neck of Femur | Contour the Left and Right NOF as solid structures to the level of the ischial tuberosity. |