Imaging for early stage breast cancer

Stereotactic APBI (SAPBI) with Cyberknife

10 patients

gold fiducials around the cavity

tracking with synchrony system (intrafraction motion)

5 mm CTV-PTV margin

5 x 6 Gy

100%

50%

fiducial

PTV

Obayomi-Davies et al. Front Onc 6:129. 2016