Anatoreg, a software designed by Anatoscope, allows registration of a reference model to a target. In our study, the reference model is the 3D reconstruction obtained from breast MRI. 3D reconstruction data are included in a Sofa Modelling Language (SML) file to be read by the registration software. The target is the optical scan, previously processed thanks to Blender (artefacts removal, axis correction, correction of unit of measurement).