COMPUTER-ASSISTED, IMPROVED ANALYSIS OF C OMBERG RADIOGRAMS BY MEANS OF A 3-DIMENSIONAL VISUALIZATION

Background Small metallic foreign bodies may easily be identified by c onventional x-ray. The Comberg shell is a useful tool to discriminate between extra-respectively intraocular localization of the foreign bod y. However, poor results are common when evaluating the x-ray films. M ethods We have improved evaluation of the radiographs by means of a pr ogram for a personal computer, regarding the following aspects: To avo id errors of measurement the relevant points of the radiograms are rea d by a digitizer-tableau. The different projection failure of the late ral respectively posteroanterior x-ray is calculated separatly. For th e calculation of the modell the true axial length of the eye is consid ered. Conclusion A three dimensional image from varying points of view gives an instructive impression of the foreign body and its relation to structures of the eye. Handling of the presented computer program i s easy. It standardizes analysis of the Comberg radiograms.