How Does It Works And How It Is Used

2427 Words Mar 9th, 2015 10 Pages
Elastography: How it works and how it is used.

A very useful and common practice often used in routine physical exams is palpation. This technique, among its several uses, allows to estimate changes in the mechanical properties of tissue when the presence of a diseases is suspected. A typical use of this technique is in the breast cancer examination: the cancer is often revealed as a stiffening of glandular tissue, which would be normally soft. Even though palpation remains an important tool for clinicians, its limited use only to accessible tissue, its limited disease detectability and spatial discrimination, and the subjectiveness of its interpretation, motivates the need to improve the mechanical properties detection of tissues through the use of imaging techniques designed to assess the properties of tissue, even when palpation is not possible. While many changes in the mechanical properties of tissues in advanced stages of several diseases are known, it would be extremely important to be able to also recognize changes that occur at earlier stages: these informations are fundamental for diagnosing, monitoring and predicting the course of the disease.
Elastography was developed in the late 1980s to early 1990s to map tissue stiffness and to replace the palpation performed by clinicians and this paper will introduce its basic principles and the most common techniques and approaches.

Mechanical properties of materials
Mechanical properties of…

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