Elastography: Imaging of Tomorrow?

Abstract

Elastography is a method of imaging that produces a type of image, called an elastogram. An area of research for almost 30 years, this diagnostic, noninvasive technique is used to evaluate the stiffness of soft tissues. It is done in correlation with a conventional sonogram. Elastography transmits information about internal tissue structures that has not been previously attainable. Discussion includes three types of elastography imaging: strain imaging, color elasticity, and shear-wave imaging. This imaging is based on the fundamentals of strain imaging and the basis that malignant tumors are harder than benign tumors. Stiffer tissues such as masses distort less than softer tissues, and the variation can be visualized on the elastic properties seen on the elastogram. Currently, elastography is being used in many applications, yet there is still reluctance by some in the medical community to fully accept elasticity imaging. Quantification and reproducibility of images will ensure the fate of this addition to the field of sonography.