Imaging for early stage breast cancer

• using patient setup with skin mark only, min. 10 mm CTV-PTV margin has to be used

• the margin can be decreased with registration by bony anatomy, but a 3 mm residual

error still remains even if the surgical clips are used for image guidance

• with inspiration breath hold technique a further reduction of heart and ipsilateral lung

dose can be achieved

• conventional 3D CT-based planning is adequate for APBI and the use of 4D-CT is

unnecessary