查看文章

The aim of this study was to establish a computer-aided automated method for cephalometric superimposition and to evaluate the accuracy of this method based on free-hand tracing.

Twenty-eight pairs of pre-treatment (T₁) and post-treatment (T₂) cephalograms were selected. Structural superimpositions of the anterior cranial base, maxilla and mandible were independently completed by three operators performing traditional hand tracing methods and by computerized automation using the feature matching algorithm. To quantitatively evaluate the differences between the two methods, the hand superimposed patterns were digitized. After automated and hand superimposition of T₂ cephalograms to T₁ cephalometric templates, landmark distances between paired automated and hand T₂ cephalometric landmarks were measured …