DocumentCode :
3463420
Title :
An image processing system for the automatic extraction of craniofacial landmarks
Author :
Cardillo, J. ; Sid-Ahmed, M.A.
Author_Institution :
Dept. of Electr. Eng., Windsor Univ., Ont., Canada
fYear :
1991
fDate :
2-9 Nov. 1991
Firstpage :
2124
Abstract :
A novel algorithm has been developed to locate craniofacial landmarks on skull X-rays. The locations of these landmarks are used by orthodontists for cephalometric evaluations. The proposed image processing method uses mathematical morphology to generate a target recognition error function whose surface is minimized to estimate the probable location of a landmark. An automatic training procedure accompanies the proposed algorithm. The training provides the means by which the algorithm may automatically learn to deal with subtle differences in a landmark´s appearance. A novel decomposition technique that provides some size invariance and a method for minimizing the search window sizes are also presented. A system was trained to locate 20 landmarks. Tests on 40 X-rays showed an 88% recognition rate and a mean location error of 1.1 mm.<>
Keywords :
bone; diagnostic radiography; medical image processing; algorithm; automatic extraction; automatic training procedure; cephalometric evaluations; craniofacial landmarks; decomposition technique; image processing system; location error; mathematical morphology; orthodontists; search window size minimization; size invariance; skull X-rays; surface minimization; target recognition error function; Graphics; Image processing; Morphological operations; Robustness; Shape; Skull; Surface morphology; Surface topography; Target recognition; X-rays;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1991., Conference Record of the 1991 IEEE
Conference_Location :
Santa Fe, NM, USA
Print_ISBN :
0-7803-0513-2
Type :
conf
DOI :
10.1109/NSSMIC.1991.259291
Filename :
259291
Link To Document :
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