Incomplete version for whole pelvic irradiation complying with RTOG0418

RTOG 0418

'A Phase II Study of Intensity Modulated Radiation Therapy (IMRT) to the Pelvis +/- Chemotherapy for Post-operative Patients with either Endometrial or Cervical Carcinoma '

Do not use this template in such prescribed dose, because some portion of bowel (especially small intestine) will be irradiate too high dose.

This trial shows several dose constraint. I try to make a plan complying with these constraint, but I cannot clear.

The prescription dose is the isodose which encompasses at least 97% of the vaginal PTV

 and nodal PTV. No more than 20% of any PTV will receive > 110% of its prescribed dose.

This prototype: 91.7%. of PTV is encompassed by prescribed dose.

This prototype: 26% of PTV recieve >110%                                

No more than 1% of any PTV will receive < 93% of its prescribed dose.

This prototype: 1.13% receive < 93%

          No more than 1% or1 cc (whichever is smaller) of the tissue outside the PTVs

            will receive > 110% of the dose prescribed to the primary PTV.                     

Small bowel < 30% to receive >= 40 Gy, minor deviation 30% to 40 Gy

This prototype: 20%

Rectum < 60% to receive >= 30 Gy, minor deviation 35% to 50 Gy     

This prototype: 69%

Bladder < 35% to receive >= 45 Gy, minor deviation 35% to 50 Gy     

This prototype: 70%

 

last modification date: 2007/11/29