ESTRO Multidisciplinary Management of Breast Cancer 2017

Image-guidance for whole breast (+/- nodes)

• EPID field images (i.e. not orthogonal) underestimate bony set- up errors by 20% to 50%

• Difference probably insignificant for tangential whole breast irradiation

• Loco-regional treatment or more advanced techniques (SIB? IMRT?) could benefit from a more accurate set up.

EPID kV CBCT

Topolnjak IJROBP 2010