Yazar "Oncu, Fatih" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • Küçük Resim
    Öğe
    Diagnostic utility of two-dimensional shear wave elastography to differentiate benign and malignant breast lesions
    (2019) Arslan, Serdar; Altunkeser, Aysegul; Durmaz, Mehmet Sedat; Eryilmaz, Mehmet Ali; Oncu, Fatih; Unlu, Yasar
    Aim: The aim of this study was to evaluate the diagnostic performance of two-dimensional shear wave elastography in the differentiation of malignant and benign breast lesions. Material and Methods: A total of 83 breast lesions in 76 patients were prospectively investigated with B-mode ultrasonography and two-dimensional shear wave elastography techniques. B-mode ultrasonography findings were classified based on BI-RADS lexicon 5th edition. The mean elasticity and the standard deviation of speed mode (m/s) and elasticity mode (kPa) were calculated for all breast lesions. Diagnostic performances of each quantitative parameters were compared. Results: Of 83 breast lesions, 45 (54.2%) were benign and 38 (45.7%) were malignant. Among the all shear wave elastography parameters, the standard deviation (ESD) of the shear wave speed (m/s) had the highest AUROC (0.953) value. When a cut-off value of 0.85 m/s was used for ESD of speed mode, sensitivity, specificity, accuracy, PPV, and NPV were detected as 94.7%, 88.8%, 91.5%, 87.8%, and 95.2%, respectively. Conclusions: Two-dimensional shear wave elastography has excellent diagnostic performance in the differentiation of benign and malignant breast lesions. The standard deviation (ESD) of speed modehad the best diagnostic performance when compared other quantitative parameters.
  • Küçük Resim
    Öğe
    Incidence and anatomical variability of accessory and sesamoid bones of the foot
    (2018) Arslan, Serdar; Bakdik, Suleyman; Oncu, Fatih; Karahan, Ali Yavuz; Durmaz, Mehmet Sedat; Ozen, Kemal Emre
    Aim: We aimed to assess the incidence, mean size, patterns, and types of accessory and sesamoid bones of the foot using computed tomography. Material and Methods: A total of 814 non-contrast-enhanced computed tomography images of the foot obtained from 717 patients between October 2015 and January 2018 were investigated retrospectively. Images acquired in the original axial plane were used to perform multiplanar reconstruction in the coronal or sagittal planes. Incidence, mean size, patterns, and types of accessory and sesamoid bones were evaluated in all images. Results: Accessory bones were detected in 387 (47.5%) non-contrast-enhanced computed tomography scans from 326 patients (45.4%). Sixty-seven patients (9.3%) showed accessory bones on both sides; 133 patients (18.5%), only on the right side; and 126 patients (17.5%), only on the left side. The most common accessory bones of the foot were the os naviculare accessorium (24.8%), os trigonum, (20.3%), os peroneum (14.6%), os intermetatarseum (10.6%), os supranaviculare (3.1%), os supratalare (1.9%), and os vesalianum (1.5%). The hallucal sesamoid bone was observed in all patients, while the interphalangeal sesamoid bone was observed in 34.6% of the patients. Conclusions: The computed tomography scans provided a detailed overview of the characteristics of accessory and sesamoid bones, and the incidence of these bones in our patients was higher than those reported in previous radiographic studies. Our findings can facilitate the diagnosis and management of disorders involving these bones.