19 Breast Cancer

Breast Cancer 439

Fig 18.2 : Measuring distances from tumour centre, relative to nipple position on face and profile mamography to define the boost target localisation in breast conserving treatment. The position of the TC is reconstructed by drawing the equatorial plane through the four depth points (2 DF and 2 DP) and orthogonal lines through ML and CC (Fig 18.3A).

Fig 3: Defining the implantation isocentre and definitive needle entrance and exit points at the skin for a breast implant. A: Reconstruction boost target isocentre from mammography, by simulator, or CT. The indicated entrance points are too close to the target volume. B: Inclination of the implantation equator plane away from the target to avoid an overlap of the boost PTV and needle exit points at the skin.