Click on image to view larger version.
Figure 1. Monoisocentric technique of locoregional radiotherapy to the breast/chest wall and regional nodes. The isocentre is at the level of the inferomedial aspect of the clavicular head. Two reference marks located 10 cm inferior to the isocentre (an anterior midline and a lateral mid-axillary mark) are tattooed. These tattoos are the treatment reference centres and all moves and distance readings are made relative to these points. An anterior midline mark at 20 cm inferior to the isocentre is also tattooed and used to align the patient to parallel the long axis of the treatment couch and reproduce the CT setup position.
