Elastography is a medical imaging modality that maps the elastic properties of soft tissue. The main idea is that whether the tissue is hard or soft will give diagnostic information about the presence or status of disease. For example, elastography is used for detection and diagnosis of breast, thyroid and prostate cancers. Certain types of elastography are also used to investigate disease in the liver.
Compressed sensing (CS) is a signal processing technique for efficiently acquiring and reconstructing a signal. This is based on the principle that, through optimization, the sparsity of a signal can be exploited to recover it from far fewer samples than required by the Shannon-Nyquist sampling theorem