Imaging of Tissue Elasticity in Gastrointestinal Disorders

摘要: Elastography or strain imaging are ultrasonographic methods which detect the elasticity stiffness of a tissue providing visual display. The basis every technique is to measure deformation caused by an external stimulus. derivative displacement called strain, and can be calculated cross-correlating radio-frequency data before after compression. value in each point color-coded displayed elastogram. This elastogram then combined with B-mode image display elastic properties examiner through color information. Equipment using quasi-static method producing compression US probe now commercially available for clinical application. application elastography small intestine represents special difficulties, as pressure from transducer cause several changes. When adding pressure, one not only deforms GI wall, but also displaces luminal content itself. With refined technology adapted transducers, sonoelastography may become important modality supplement ultrasonography assessment gastrointestinal diseases.