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Diagnosis of Diabetic Retinopathy Using Face-Recognition Techniques
Luis Frazao,Nipon Theera-Umpon,Sansanee Auephanwiriyakul 한국재활복지공학회 2016 한국재활복지공학회 학술대회논문집 Vol.2016 No.11
An automatic diagnostic system to detect diabetic retinopathy in 1200 eye color fundus images from the popular Messidor database was developed with promising results. The innovative methodology was inspired by techniques usually applied in the field of face recognition, namely the Principal Component Analysis (PCA) and the Independent Component Analysis (ICA). The analysis of local retinal features (exudates and red lesions) in addition to the holistic texture features analyzed in this work is expected to improve the system performance.
Assessment of the anterior loop of the mandibular canal: A study using cone-beam computed tomography
Nascimento, Eduarda Helena Leandro do,Pontual, Maria Luiza dos Anjos,Pontual, Andrea dos Anjos,Perez, Danyel Elias da Cruz,Figueiroa, Jose Natal,Frazao, Marco Antonio Gomes,Ramos-Perez, Flavia Maria d Korean Academy of Oral and Maxillofacial Radiology 2016 Imaging Science in Dentistry Vol.46 No.2
Purpose: Sufficient area in the interforaminal region is required for dental implant placement, and the anterior loop of the mandibular canal is located within the limits of this area. The aim of this study was to evaluate the prevalence and extent of the anterior loop in a Brazilian sample population using cone-beam computed tomography (CBCT). Materials and Methods: CBCT images from 250 patients (500 hemimandibles) obtained for various clinical indications were randomly selected and evaluated to determine the presence and length of the anterior loop. The length of the anterior loop was then compared based on gender, age, and the side of the mandible. The data were analyzed using the Pearson chi-square test and linear regression analysis. Results: An anterior loop was identified in 41.6% of the cases, and its length ranged from 0.25 mm to 4.00 mm (mean, $1.1{\pm}0.8mm$). The loop had a greater mean length and was significantly more prevalent in males (p=0.014). No significant differences were found between the right and left sides regarding length (p=0.696) or prevalence (p=0.650). Conclusion: In this study, a high prevalence of the anterior loop of the mandibular canal was found, and although its length varied greatly, in most cases it was less than 1 mm long. Although this is a prevalent anatomical variation, safety limits for the placement of implants in this region cannot be established before an accurate evaluation using imaging techniques in order to identify and preserve the neurovascular bundles.