Gynae BT_Lucknow_2018

3D-based Dose Volume Parameters for OAR

CLASSICAL MAX DOSE in 2D: in 3D a voxel is no clinical relevant endpoint

Sigmoid

GTV

FIXED VOLUME : tolerance dose (total dose)- “minimum dose to the most exposed tissue”*

Rect

Bladder

0.1 cc: 3D“maximum dose“: ulceration(fistula)

1cc/2cc:teleangiectasia (20 mm x 20 mm x 5 mm)

0.1 cm 3

2 cm 3

* GYN GEC ESTRO Recommendations(II) Radiother Oncol 2006