2017_SBRT_Course Book

Management of intrafraction motion

Rectal balloons disadvantages

Dosimetric gain is mostly for 3D CRT (i.e. 4-field box)

Irritation of the anal canal (hemorroids) Cho KJMS 2009

Complex procedure: may require frequent adjustments to avoid systematic errors or deformations (Jones Med Phys 2012, Miralbell IJROBP 2010)

Increases treatment time

Mixed experience, complex and invasive procedure with questionable benefit.