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    Deep learning methods in the diagnosis of sacroiliitis from plain pelvic radiographs
    (Oxford Univ Press, 2023) Ureten, Kemal; Maras, Yuksel; Duran, Semra; Gok, Kevser
    Objectives The aim of this study is to develop a computer-aided diagnosis method to assist physicians in evaluating sacroiliac radiographs. Methods Convolutional neural networks, a deep learning method, were used in this retrospective study. Transfer learning was implemented with pre-trained VGG-16, ResNet-101 and Inception-v3 networks. Normal pelvic radiographs (n = 290) and pelvic radiographs with sacroiliitis (n = 295) were used for the training of networks. Results The training results were evaluated with the criteria of accuracy, sensitivity, specificity and precision calculated from the confusion matrix and AUC (area under the ROC curve) calculated from ROC (receiver operating characteristic) curve. Pre-trained VGG-16 model revealed accuracy, sensitivity, specificity, precision and AUC figures of 89.9%, 90.9%, 88.9%, 88.9% and 0.96 with test images, respectively. These results were 84.3%, 91.9%, 78.8%, 75.6 and 0.92 with pre-trained ResNet-101, and 82.0%, 79.6%, 85.0%, 86.7% and 0.90 with pre-trained inception-v3, respectively. Conclusions Successful results were obtained with all three models in this study where transfer learning was applied with pre-trained VGG-16, ResNet-101 and Inception-v3 networks. This method can assist clinicians in the diagnosis of sacroiliitis, provide them with a second objective interpretation and also reduce the need for advanced imaging methods such as magnetic resonance imaging.
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    Diagnosis of osteoarthritic changes, loss of cervical lordosis, and disc space narrowing on cervical radiographs with deep learning methods
    (Turkish Joint Diseases Foundation, 2022) Maras, Yuksel; Tokdemir, Gul; Ureten, Kemal; Atalar, Ebru; Duran, Semra; Maras, Hakan
    Objectives: In this study, we aimed to differentiate normal cervical graphs and graphs of diseases that cause mechanical neck pain by using deep convolutional neural networks (DCNN) technology. Materials and methods: In this retrospective study, the convolutional neural networks were used and transfer learning method was applied with the pre-trained VGG-16, VGG-19, Resnet-101, and DenseNet-201 networks. Our data set consisted of 161 normal lateral cervical radiographs and 170 lateral cervical radiographs with osteoarthritis and cervical degenerative disc disease. Results: We compared the performances of the classification models in terms of performance metrics such as accuracy,
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    Metaplastik Meme Karsinomu: Olgu Sunumu
    (Kırıkkale Üniversitesi, 2013) Elverici, Eda; Barça, Ayşe Nurdan; Çavuşoğlu, Mehtap; Duran, Semra; Araz, Levent
    M etaplastic carcinoma is a rare type of breast cancer and accounts for less than 1% of all invasive breast cancers. In this report, we aimed to present the ultrasonographic and Doppler ultrasonographic findings of metaplastic carcinoma of the breast which is an aggressive type of breast cancer with worse prognosis than classical breast carcinomas.A 40-year-old female patient presented with a palpable mass in her right breast. Breast ultrasound revealed a heterogeneous hypoechoic, round-shaped, microlobulated mass of 23 x 20 mm of dimensions in the lower inner quadrant of the right breast and also edema of the adjacent parenchyma. We found relative high resistive index”of the feeding arteries (RI: 0.62) in doppler examination of the mass. The lesion was reported as BI-RADS 4 category and excisional biopsy was recommended. Histopathological examination revealed metaplastic carcinoma of the breast. Tumour cells were positive for progesterone receptor (70% positive) and c-erb-B2 (30% positive). Metaplastic carcinoma of the breast, which is an aggressive type of breast cancer with worse prognosis than classical breast carcinomas should be included in the differential diagnosis of breast tumors, even in evaluating lesions with benign sonographic and mammographic features.