Figure 3.

Schematic of the breast tissue and probe placement during accuracy studies of probe localization. The location of the reference points within a coordinate system (in cm) are shown, where the center (nipple) region of the left breast was arbitrarily selected to be the origin and used as such for all studies. The green dotted rectangle shows the initial probe position where the probe origin (bottom left corner of the probe face) is aligned with the initial reference point (chosen as the origin of the coordinate system). The probe origin was then placed over each of the other reference points marked on the tissue and the tracked location was recorded. Figure not to scale.