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2004, 12

M. R. Benbrahim, R. Benslimane, El. Aalloula

Automatic retiming method based on genetic algorithm for the detection and the follow-up of dental lesions

language: English

received 16.08.2004, published 27.09.2004

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In dental surgery, a great number of pathologies (cysts, granuloma…) presents clinical, radiological and evolutionary aspects considerably polymorphic. Medical imagery and particularly oral imagery, by the means of the digitized images and the image analysis algorithms, constitutes an essential element which leads to a precise presumptive diagnosis. The technique of retiming per subtraction can be thus used to recognize in two-dimensional images evolution of the pathological zones (lesions, tumours). From this point of view, a method of automatic retiming was developed by genetic algorithm to follow the evolution of the pathological zones after parodental treatment. In this article the traditional technique of retiming by specifying its disadvantages for our application and then an automatic model of retiming, which offers promising results, are presented. This tool will make it possible to distinguish, identify, and visualize automatically the form of the pathological structures and their evolution in time. An analysis of form and texture of these structures will allow the identification type of pathology.

13 pages, 9 figures

Сitation: M. R. Benbrahim, R. Benslimane, El. Aalloula. Automatic retiming method based on genetic algorithm for the detection and the follow-up of dental lesions. Electronic Journal “Technical Acoustics”,, 2004, 12.


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Benbrahim Med Reda was born in Fes, Morocco. He received the D.U.T diploma from High School of Technology of the Sidi Mohamed Ben Abdellah University, Fes, Morocco in 1990, the Master degree from University of Bordeaux, France in 1992 and the Ph.D. degrees from the University of Bordeaux, France in 1996. Since 1996, he is Assistant Professor at the High School of Technology, University of Sidi Mohamed Ben Abdellah (Fes, Morocco) and researcher member of the Laboratory of Transmission and Image Processing (LTTI). His research is focused on Medical Image Analysis.

e-mail: r_benbrahim(at)


Rachid Benslimane received his Ph.D. from the University of Montpellier (France) in 1985. From 1986 to 1992 he has been an Assistant Professor in the University Sidi Mohamed Ben Abdellah, where he has received in 1992 his second Doctor's degree. From this date he was appointed Professor at the High School of Technology where he established the Laboratory of Transmission and Image Processing (LTTI). He supervised more than 15 Ph.D. thesis and managed research projects supported by National Institutions as well as European Projects. R. Benslimane has co-authored more than 80 papers including 17 journal papers. His scientific work deals with Image Processing and analysis, Image retrieval by content-based approach and data analysis.


El Houssaine Aalloula - Head of Orthodontie Service of CHU IBN SINA, Vice-senior of the dental Faculty of Medicine, University Mohammed V. Suissi (Rabat, Morocco). His research is focused on dental pathologies and computer analysis.