Imaging for early stage breast cancer

Compliance to dose requirements of RTOG-0413 with prone APBI

-144 patients treated with 3D-CRT in prone position (30 Gy in 5 fractions) - reduced respiratory motion in prone position, smaller PTV than that of RTOG 0413

very low dose to lung and heart

higher dose to contralateral breast

different contours

Wen et al. IJROBP 84:910-16. 2012