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ALINHAMENTO E SUBTRAÇÃO DIGITAL DE RADIOGRAFIAS ODONTOLÓGICAS PARA MELHORIA NO DIAGNÓSTICO DA DOENÇA PERIODONTAL

Rodrigues, E. B.Schiabel, H.Escarpinati, M. C.Rubira_Bullen, I. R. F.

The radiography is one of the primary features to aid in the diagnosis and to monitor thetreatment of the periodontal diseases. However, the subjective analysis of these radiographs done bythe dentist can just identify a lesion above 30% of mineral loss, leading to a serious challenge forthe practice of Odontology. A practical solution for this problem that has being widely researched[MARUKO, 1993; WEBBER, 1982; WEBBER, 1984] is the employment of computationaltechniques to aid in the diagnosis of digital odontologic radiographs. This way, this work presentsan algorithm to quantify the bone loss or gain through the analysis of digital odontologicradiographs. The computational algorithm developed utilizes the image subtraction technique torealize the necessary measurements. First, two digital odontologic radiographs, taken at differenttimes are aligned to allow that common structures on both images be represented by the same pixelsaddresses. Then they are subtracted to obtain only the differences of the structures represented bythe analised images. The subtraction provides the detection of subtle changes, about 5%, leading toan early diagnosis of the disease and so enlarging the healing and the success of its treatment.

http://www.lbd.dcc.ufmg.br/colecoes/wvc/2005/003.pdf

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