Course book Advanced Treatment Planning 2018

Limitations of 3DCRT

▪ Hard to get acceptable plans for concave targets

▪ One needs a large number of beams to accomplish dose coverage for complicated target volumes

▪ limited possible beam directions in regions with large number of critical structures ▪ optimal beam angles often non- coplanar and can be difficult to apply without collisions, and moreover: difficult to find

Courtesy Marika Enmark