Yazar "Altunkeser, Aysegul" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • Küçük Resim Yok
    Öğe
    Digital breast tomosynthesis and ultrasonography: diagnostic performance and effect on recall rates versus digital mammography in category O
    (E-Century Publishing Corp, 2017) Emlik, Ganime Dilek; Poyraz, Necdet; Altunkeser, Aysegul
    The purpose of this study was to compare diagnostic performance and screening recall rates of digital breast tomosynthesis (DBT) and ultrasound (US) added to digital mammography (DM) in the category O. This study was approved by the local ethics committee and informed consent was obtained. The additional breast US and DBT performed 216 women categorized as BI-RADS category O according to screening DM between January 2014 and February 2015. A total of 22 women that previously underwent breast surgery, radiotherapy, chemotherapy were excluded. Finally 194 patients were enrolled in this study. The DM+DBT images and DM+DBT images with US images of patients were independently reviewed by three breast radiologists and than recategorized according to BI-RADS category. Among 194 lesions, 165 (85%) were benign and 29 (14.9%) were malign. DBT reduced recall rate by 70%. For DBT, sensitivity, specificity, PPV, NPV and diagnostic accuracy were 97%, 82%, 48%, 99%, and 84%, whereas for US sensitivity, specificity, PPV, NPV and diagnostic accuracy were 93%, 79%, 47%, 98%, and 81%, respectively. AUC value was 0.89 and 0.86 for DBT and US. In conclusion, DBT reduced recall rates. DBT showed better diagnostic performance than breast US for category O. Reduction in RR was independent from breast parenchymal patterns.
  • Küçük Resim Yok
    Öğe
    Effectiveness of Superb Microvascular Imaging for the differentiation of intraductal breast lesions
    (Soc Romana Ultrasonografe Medicina Biologie-Srumb, 2018) Bakdik, Suleyman; Arslan, Serdar; Oncu, Fatih; Durmaz, Mehmet Sedat; Altunkeser, Aysegul; Eryilmaz, Mehmet Ali; Unlu, Yasar
    Aims: The aim of this study was to compare the diagnostic performance of superb microvascular imaging (SMI) and power Doppler imaging (PDI) for the differentiation of intraductal breast lesions. Materials and methods: A total of 54 intraductal breast lesions (39 benign, 10 atypical, and 5 malignant) in 53 patients were examined using B-mode ultrasonography, PDI, and SMI. Vascularity grading, distribution of microvessels, and penetrating vessels were evaluated using each Doppler technique. The diagnostic performances of both methods were compared. Results: SMI was more efficient in detecting flow signals than PDI (p=0.004). The highest diagnostic accuracy rates were achieved with SMI using vascular grading. When hypervascularity was used as a cut-off value to differentiate malignant and atypical lesions from benign lesions, the sensitivity, specificity, positive predictive value, negative predictive value, and accuracy were 66.6%, 80.7%, 66.6%, 80.7%, and 75.6% for PDI, and 86.6%, 76.9%, 68.4%, 90.9%, and 80.4% for SMI, respectively. Conclusions: SMI is more sensitive than PDI for detecting subtle blood flow in intraductal breast lesions with statistical significance. This novel and promising vascular imaging technique may be helpful in B-mode ultrasonography to distinguish intraductal breast lesions.