Imaging for early stage breast cancer

One external catheter on the skin, with the tip reaching the infraclavicular region, parallel to the internal catheter

One internal catheter, attached to the shieding disc with the tip reaching the infraclavicular region

Mean dose 0.26-0.49 Gy (external) Max dose < 2 Gy at 2.0 cm (internal) Max dose at 2,5 cm negligible