Lung Diseases Clinical Trial
Official title:
Role of Ultrasound Elastography in Differentiation of Peripheral Lung Lesions
Advancements in imaging capacities and the development of a precise puncture-guiding transducer have made transthoracic ultrasonography a useful diagnostic tool for evaluating peripheral subpleural lung tumours. Different human tissues have varying levels of elasticity because of the properties of the extracellular matrix. Pleural two-dimensional (2D) shear-wave elastography (SWE) can be used to differentiate between malignant pleural effusion and benign pleural disease. Transthoracic 2D-SWE uses acoustic radiation force and assesses the velocity of tissue displacement propagation in multiple focal zones. The shear waves are monitored in 2D by creating a near-cylindrical shear-wave cone, enabling measurement of the shear-wave speed or Young's modulus (E) on a colour quantitative elastogram. Based on the hypothesis that transthoracic 2D-SWE could add accurate tissue stiffness information to B-mode grayscale ultrasound images and help in differentiating lung malignancy from benign lung lesions.
B-mode grayscale images will be used by ultrasound to assess peripheral lung lesions. Information including size, location, and intercostal chest wall thickness will be collected. Then, Investigators will use transthoracic 2D-SWE to assess those lesions. Investigators intend to use regions of interest (ROIs) with 3-mm diameter, and select up to four ROIs with the highest mean elasticity values. the average as the final value will be calculated. If patients had multiple sub-pleural lung lesions, the largest and the most approachable one will be chosen to perform 2D-SWE. Final diagnosis will be made via appropriate diagnostic modalities including computed tomography of chest, microbiological results and guided biopsies if indicated. ;
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