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An image processing system for locating craniofacial landmarks

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2 Author(s)
Cardillo, J. ; Dept. of Electr. Eng., Windsor Univ., Ont., Canada ; Sid-Ahmed, M.A.

A new automatic target recognition algorithm has been developed to extract craniofacial landmarks from lateral skull X-rays (cephalograms). The locations of these landmarks are used by orthodontists in what is referred to as a cephalometric evaluation. The evaluation assists in the diagnosis of anomalies and in the monitoring of treatments. The algorithm is based on gray-scale mathematical morphology. A statistical approach to training was used to overcome subtle differences in skeletal topographies. Decomposition was used to desensitize the algorithm to size differences. A system was trained to locate 20 landmarks. Tests on 40 X-rays showed an 85% recognition rate on average

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Medical Imaging, IEEE Transactions on  (Volume:13 ,  Issue: 2 )