Operative reconstruction of fractured orbital floors must among others ensure equal volumes for left and right sides. In this paper, we present Thomas M. Deserno1 Wei Liao1 a planning tool which is capable to segment the content of the orbits Marc C. Metzger2 by means of an active contour model as well as to compute and visualize Melanie E. H. Kleiner1 their volumes in order to assist physicians in planning as well as follow up. In addition to technical levels of integration such as function and Dirk Schulze2 presentation integration, which are achieved by applying the Medical Imaging Interaction Toolkit (MITK), as well as data and context integration, which result from the DICOM interface, stability, robustness, and correctness is regarded most relevant for routine integration. 1 Institut f