Figure 5: Imaging for postoperative quality control. In order to assess the position of the prosthesis in the middle ear by means of rotational tomography (here: total prosthesis, total ossicular replacement prosthesis (TORP)) the coupling angle a between the prosthesis head plate and the eardrum/manubrium and the angular deviation ß of the prosthesis stem from the vertical stapes axis is determined in coronal section (a; b) and sagittal section (courtesy of Zaoui et al., 2014 [95]).