2014 Volume 32 Issue 2 Pages 87-92
MR Elastography is noninvasive measurement of mechanical properties on organ. MR Elastography is a technology that is based on bi-polar gradient magnetic field technique and wave propagation. MR Elastography is taken with bi-polar gradient magnetic field and its synchronized forced shear oscillation and enables to measure wave propagation as information of phase image. Generally speaking, velocity of wave propagation is multiply wavelength and frequency of forced oscillation. Also, square of velocity is equal to modulus of rigidity divided by density of media. Modulus of rigidity on organ, therefore, is calculated from wavelength that is measured from phase image and frequency of oscillation is decided in advance with organ's density that is equal to water's one.
