Ultrasound BI-RADS classification and real-time elastography Tsukuba score assessment of breast lesions: inter-and intraobserver agreement

Introduction: Breast ultrasonography is a widely recognized diagnostic tool for evaluating breast lesions. Breast lesions are classified according to the Breast Imaging Reporting and Data System (BI-RADS) in categories 2 – 5. Alternatively, real time elastography (RTE) explores stiffness differences between breast lesions and the surrounding normal parenchyma at the macroscopic scale and is classified in a Tsukuba elasticity score (TS). Our aim was to prospectively evaluate inter-and intraobserver agreement of BI-RADS classification and TS of breast lesions.