Ultrasound elastography (USE) is a rapidly developing field of imaging that measures and displays tissue elasticity or stiffness properties using ultrasound.
VTQ allows quantification measurement of tissue elasticity in a selected region in the lesion whereas VTI estimates the elasticity of the whole lesion.
The temperature maps measured with PA imaging [ 26] and the tissue elasticity measured with MMUS imaging [ 12, 13, 19] are important parameters expected to change significantly during the photothermal therapy.
The tissue elasticity was measured intensively and strictly within a controlled timeline of 6 months by quantitative optical coherence elastography (OCE) system.
In conclusion, we have found that pre-treatment tissue elasticity as measured by SWE has a significant relationship with the subsequent reduction in cellularity of the primary tumour in response to NAC.
The tissue elasticity is calculated by measuring the velocity of shear-waves, which is different in soft and hard tissues of the prostate.
We have found that pre-treatment tissue elasticity in breast cancer, measured by ultrasound SWE, has a statistically significant relationship with the subsequent response of invasive breast cancer to NAC.
The resistance to plastic deformation H is an estimation of the purely plastic deformation occurring during loading and is independent from the tissue elasticity, contrary to the contact hardness (Hc) usually measured using nanoindentation [33].
Such information can be displayed by ARFI systems as either a map reflecting spatial differences in tissue stiffness, or more commonly quantitatively: in most cases, the tissue elasticity is then expressed as shear wave velocity (SWV), usually measured in meters per second (m/s).
