This phenomenon is referred to as anisotropic diffusion. In order to determine the precise diffusivity in the CNS, tensor analysis should be used. DW-EPI is prevalent in stroke imaging due to its capability to show cytotoxic edema within minutes after the onset of ischemia. DW-EPI is a powerful tool in detecting brain disorders such as hemorrhages, abscesses, demyelinating and neoplastic diseases and so fourth. It will also provide more specific insights into other pathological of the CNS in the future.
Elasticity is an important physical property.
In clinical practice, elasticity is utilized in physical examination in several ways, such as palpation or percussion. Differences in elasticity can help facilitate the diagnosis of tumors and their extent. Elasticity is an essential element in the diagnosis of liver cirrhosis, or soft degeneration in tissue necrosis. State of the art of MRE is summarized in this article. To understand the principle of MRE, the definitions of both Young's modulus and shear modulus are important.