The advantages of using narrowband shear waves to estimate the viscoelastic properties of tissue will be discussed. Explore the definition of viscosity, the equations used to measure it, and the practical uses of both. You known viscosity very well, even before listening this term viscosity in your physics & chemistry class. Viscosity is a characteristic of thickness that describes a fluids resistance to flow. These highly viscous liquids are some examples of viscosity in science. Dynamic viscosity is the resistance to movement of one layer of a fluid over another and is defined by Formula F7.8. Of interest are the low-frequency narrowband shear waves that can be generated by a modulated radiation force produced by the interference of two continuous-wave (CW) ultrasound beams of slightly different frequencies. Viscosity - Definition, Meaning, Types, Formula, Unit, Law, Example, Measurement of viscosity in chemistry. The basic principles of the static and dynamic methods will be described with special emphasis on the dynamic methods that rely on the acoustic radiation force of ultrasound. In this chapter, an overview of elastography and its relation to tissue pathology will be presented.

Tao Zhang, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, China. “Elastography” or “elasticity imaging” can be defined as the science and methodology of estimating the mechanical properties of a medium (including soft tissue). Green chemistry is, by definition, a continuously-evolving frontier.

Definition of viscosity in science