ESTRO Multidisciplinary Management of Breast Cancer 2017

Advantage over good old wedges ?

Comparison of (physical) wedged and f-IMRT tangential fields:

f-IMRT Wedged

MU

232

308

Thyroid

1.2cGy 2.8cGy

Contr. breast

5.2

7.9

Mid pelvis

0.2cGy 1.0cGy

Improved dose homogeneity in the PTV Ludwig Strahlenther Onkol. 2008

2.5 cGy = approx 16 CBCTs

(half that value for dynamic wedges)