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

2013 ◽  
Vol 7 (1) ◽  
Author(s):  
Przemysław Maćkowiak ◽  
Tomasz Kulczyk ◽  
Elżbieta Kaczmarek
Keyword(s):  
Cortical Bone ◽  
Postmenopausal Women ◽  
Region Of Interest ◽  
Panoramic Radiographs ◽  
Lower Border ◽  
Cortical Width ◽  
Computer Aided ◽  
Width Measurement ◽  
Mandibular Cortical Width

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.

Computer-aided measurement of mandibular cortical width on dental panoramic radiographs for identifying osteoporosis

2011 ◽  
Vol 3 (1) ◽  
pp. 36-44 ◽  
Author(s):  
Muthu Subash Kavitha ◽  
Febriliyan Samopa ◽  
Akira Asano ◽  
Akira Taguchi ◽  
Mitsuhiro Sanada
Keyword(s):  
Panoramic Radiographs ◽  
Cortical Width ◽  
Computer Aided ◽  
Mandibular Cortical Width

Use of Fuzzy Neural Network in Diagnosing Postmenopausal Women with Osteoporosis Based on Dental Panoramic Radiographs

2007 ◽  
Vol 11 (8) ◽  
pp. 1049-1058 ◽  
Author(s):  
Agus Zainal Arifin ◽  
◽  
Akira Asano ◽  
Akira Taguchi ◽  
Takashi Nakamoto ◽  
...  
Keyword(s):  
Neural Network ◽  
Postmenopausal Women ◽  
Fuzzy Neural Networks ◽  
Mineral Density ◽  
Inference System ◽  
Panoramic Radiographs ◽  
Cortical Width ◽  
Bmd Testing ◽  
Computer Aided ◽  
Fuzzy Neural

A thin or eroded cortex of the mandible detected on dental panoramic radiographs is independently associated with low skeletal bone mineral density (BMD) or osteoporosis in postmenopausal women. The purposes of this study were to develop new computer-aided diagnosis system that combines these two panoramic measures by using fuzzy neural networks (FNN) for identifying postmenopausal women with osteoporosis. Dental panoramic radiographs of 100 postmenopausal women who visited our clinic and had BMD assessments at the lumbar spine and the femoral neck were used in this study. Mandibular cortical width and shape were measured by computer-aided systems and used as the inputs. This system partitioned the input space into a set of subspaces using a novel fuzzy thresholding and constructed the fuzzy inference system incorporated with multi layer perceptron neural network. Our results show that the combination of cortical width and shape by using FNN can be used for the identification of postmenopausal women with osteoporosis in dental clinic. Dentists may identify postmenopausal women accurately by using the new FNN based system and refer them to medical professional for BMD testing.

scholarly journals Computer-aided diagnosis system for osteoporosis based on quantitative evaluation of mandibular lower border porosity using panoramic radiographs

2020 ◽  
Vol 49 (4) ◽  
pp. 20190481
Author(s):  
Takashi Nakamoto ◽  
Seina Hatsuta ◽  
Shotaro Yagi ◽  
Rinus Gerardus Verdonschot ◽  
Akira Taguchi ◽  
...  
Keyword(s):  
Bone Density ◽  
Cortical Bone ◽  
Screening System ◽  
Characteristic Analysis ◽  
Visual Evaluation ◽  
Panoramic Radiographs ◽  
Lower Border ◽  
Computer Aided ◽  
New System ◽  
Lumbar Bone Density

Objectives: A new computer-aided screening system for osteoporosis using panoramic radiographs was developed. The conventional system could detect porotic changes within the lower border of the mandible, but its severity could not be evaluated. Our aim was to enable the system to measure severity by implementing a linear bone resorption severity index (BRSI) based on the cortical bone shape. Methods: The participants were 68 females (>50 years) who underwent panoramic radiography and lumbar spine bone density measurements. The new system was designed to extract the lower border of the mandible as region of interests and convert them into morphological skeleton line images. The total perimeter length of the skeleton lines was defined as the BRSI. 40 images were visually evaluated for the presence of cortical bone porosity. The correlation between visual evaluation and BRSI of the participants, and the optimal threshold value of BRSI for new system were investigated through a receiver operator characteristic analysis. The diagnostic performance of the new system was evaluated by comparing the results from new system and lumbar bone density tests using 28 participants. Results: BRSI and lumbar bone density showed a strong negative correlation (p < 0.01). BRSI showed a strong correlation with visual evaluation. The new system showed high diagnostic efficacy with sensitivity of 90.9%, specificity of 64.7%, and accuracy of 75.0%. Conclusions: The new screening system is able to quantitatively evaluate mandibular cortical porosity. This allows for preventive screening for osteoporosis thereby enhancing clinical prospects.

Computer-aided system for measuring the mandibular cortical width on panoramic radiographs in osteoporosis diagnosis

2005 ◽  
Author(s):  
Agus Zainal Arifin ◽  
Akira Asano ◽  
Akira Taguchi ◽  
Takashi Nakamoto ◽  
Masahiko Ohtsuka ◽  
...  
Keyword(s):  
Panoramic Radiographs ◽  
Osteoporosis Diagnosis ◽  
Cortical Width ◽  
Computer Aided ◽  
Mandibular Cortical Width
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