Mandibular cortical width measurement based on dental panoramic radiographs with computer-aided system

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Przemysław Maćkowiak
Tomasz Kulczyk
Elżbieta Kaczmarek


The paper presents a method of the determining a mandibular cortical width on dental panoramic radiographs. Cortical width of lower border of mandible may potentially be associated with recognition of osteoporosis in postmenopausal women. An algorithm to perform a semiautomatic cortical width measurement in a given region of interest was developed. The algorithm is based on separate extraction of lower and upper boundaries of cortical bone. Results of boundaries extraction performed on 34 panoramic radiographs of healthy and osteoporotic individuals are presented, together with automatic measurements of particular distances. They were compared with results of hand-made measurements done by two maxillofacial radiologists. Presented algorithm may potentially be useful for screening patients with osteoporosis.

Article Details

BioInformatics and e-Technologies
Author Biographies

Przemysław Maćkowiak, Poznan University of Technology

Poznań University of Technology Faculty of Electronics and Telecommunications Chair of Multimedia Telecommunications and Microelectronics

Tomasz Kulczyk, University of Medical Sciences

Head of Section of Dental Radiology at Department of Biomaterials and Experimental Dentistry of University of Medical Sciences in Poznan

Elżbieta Kaczmarek, Poznan Univeristy of Medical Sciences

Department of Pathology


M. Van der Klift, H.A. Pols, JM Gelenijse, D.A.M, Van der Kuip, A. Hofman, C.E.D.H De Laet, "Bone mineral density and mortality in elderly men and women," Bone, 30, pp. 643-651, 2002.

K. Horner, H. Devlin, C.W. Alsop, I.M. Hodgkinson, J.E Adams, "Mandibular bone mineral density as a predictor of skeletal osteoporosis," British Journal of Radiology, 69, pp. 1019-1025, 1996.

K. Horner, H. Devlin, L. Harvey "Detecting patients with low skeletal bone mass," Journal of Dentistry, 30, pp. 171-175, 2002.

L. Choel, F. Duboeuf, D. Bourgeois, A. Briguet, M. Lissac, "Trabecular alveolar bone in the human mandible: a dual- energy x-ray absorptiometry study," Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics, 95, pp. 364-370, 2003.

W.G.M. Geraets, J.G.C. Verheij, P.F. van der Stelt, K. Horner,C. Lindh, K. Nicopoulou-Karayianni, R. Jacobs, E.J. Harrison, J.E. Adams, H. Devlin "Prediction of bone mineral density with dental radiographs," Bone, 40, pp. 1217-1221, 2007

P. D. Allen, J. Graham, D. J. J. Farnell, E. J. Harrison, R. Jacobs, K. Nicopolou-Karayianni, C. Lindh, P. F. van der Stelt, K. Horner, H. Devlin, "Detecting Reduced Bone Mineral Density From Dental Radiographs Using Statistical Shape Models," IEEE Transaction on Information Technology in Biomedicine, 6, pp. 601-610, 2007.

A. Z. Arifin, A. Asano, A. Taguchi, T. Nakamoto, M. Ohtsuka, M. Tsuda, Y. Kudo, K. Tanimoto, "Computer- aided system for measuring the mandibular cortical width on dental panoramic radiographs in identifying postmenopausal women with low bone mineral density," Osteoporosis International, 17, pp. 753-759, 2006.

K. Karayianni, K. Horner, A. Mitsea, L. Berkas, M. Mastoris, R. Jacobs, C. Lindh, P.F. van der Stelt, E. Harrison, J.E. Adams, S. Pavitt, H. Devlin, "Accuracy in osteoporosis diagnosis of a combination of mandibular cortical width measurement on dental panoramic radiographs and a clinical risk index (OSIRIS): The OSTEODENT project," Bone, 40, pp. 223–229, 2007.

E. N. Mortensen, W. A. Barrett, "Interactive Segmentation with Intelligent Scissors," Graphical Models and Image Processing, 60, pp. 349–384, 1998.

A.Z. Arifin, A. Asano, A. Taguchi, T. Nakamoto, M. Ohtsuka, K. Tanimoto, "Computer-aided system for measuring the mandibular cortical width on panoramic radiographs in osteoporosis diagnosis", Progress in Biomedical Optics and Imaging - Proceedings of SPIE, 5747, pp. 813-821, 2005.