AROI-ESTRO GYN Teaching Course

Summary • Soft tissue structures cannot be visualized in radiographs , therefore, doses to surrogates are used to represent target and OARs.

• Standard loading pattern and Point A plan is a good start for complicated plans and hence recommended by ICRU 89

• Point A dose is NOT a surrogate for tumor dose. For small tumors , 2D planning delivers high dose to the tumor while exceeding the dose to the OARs, For large tumors , 2D Planning under-dose the tumor

• ICRU Rectal point over estimates and bladder point over estimates as compared to D2cc