Flipping Book- BTP

2D vs. 3D Treatment Planning

•

2D planning:

• Single patient contour

• Volumes and dose drawn (calculated) on a single

transverse contour through central axis.

• Simulation (Radiographs) to determine SSD, field size

(and depth of volumes)

•

2D planning and 3D calculation:

• Patient contour in 3D

• Dose calculated in 3D (tissue inhomogenity taken into

account)

•

3D planning (3DCRT):

• Delineation of volumes

• Use of dose-volume histogram