First Steps toward Location of Landmarks on X-Ray Images

Michel Desvignes (1) , Barbara Romaniuk (1) , Régis Clouard (1) , Ronan Demoment (1) , Marinette Revenu (1) , Marie-Josèphe Deshayes (2)

1 Equipe Image - Laboratoire GREYC - UMR6072
2 GREYC - Groupe de Recherche en Informatique, Image et Instrumentation de Caen

We address the problem of locating some anatomical bone structures on lateral cranial X-ray images. These structures are landmarks used in orthodontic therapy. The main problem in this pattern recognition application is that the landmarks are difficult to distinguish on images even for the human expert, because of lateral projection of the X-ray process. We propose a 3 steps approach: the first step provides a statistical estimation of the landmarks, using an adaptive coordinates space; the second step computes a region of interest around the estimated landmark; and in the third step, each landmark is precisely located using its anatomical definition. This paper describes the two first generic steps and gives examples of the last step for two anatomical points

Mots clés: X-ray imaging; estimation theory; medical image processing; pattern recognition; statistical analysis

Domaines: Traitement des images [eess.IV]

Michel Desvignes, Barbara Romaniuk, Régis Clouard, Ronan Demoment, Marinette Revenu, et al.. First Steps toward Location of Landmarks on X-Ray Images. 15th International Conference on Pattern Recognition, 2000, Barcelone, Spain. pp.275-278, ⟨10.1109/ICPR.2000.906066⟩. ⟨hal-00843450⟩