Ultrasound elastography has been gradually used in clinic with the rapid development of ultrasonic technique,and presents a promising application prospect in differentiated diagnosis of benign and malignant disease.The aim of the study is to evaluate the accuracy of endobronchial ultrasound elastography in the diagnosis of thoracic lesions.~Conventional ultrasound and ultrasound elastography are respectively used to examine thoracic lesions before aspiration,then the images are saved as video clips. Features of conventional ultrasound and parameters of ultrasound elastography are analysed and recorded by skilled worker. The investigators define the pathological results of EBUS-TBNA combined with results of six months follow-up as the Gold Standard. The receiver operator characteristic curves are drawn to obtain area under the Curve (AUC) and the best diagnostic threshold values of each parameters. According to the best cutoff values, the investigators respectively calculate the accuracy, sensitivity, specificity, odds product of each parameters, and then compare them with each other to evaluate the value of ultrasound elastography
The study aims to evaluate the role of endobronchial ultrasound elastography in differentiated diagnosis of benign and malignant thoracic lesions