AROI-ESTRO GYN Teaching Course

Limitation of Point A

• Different methods of definition provide different values for the calculated dose rate to point A.

• Relates to position of sources and not to specific anatomic structure.

• It is very sensitive to position of ovoid sources relative to tandem which should not be deciding factor in deciding on implant duration.

• Depending on size of cervix point A may be inside or outside of tumor.