Elastography

Photoacoustic elastography.

Elastography can noninvasively map the elasticity distribution in biological tissue, which can potentially be used to reveal disease conditions. In this Letter, we have demonstrated photoacoustic elastography by using a linear-array photoacoustic computed tomography system. The feasibility of photoacoustic elastography was first demonstrated by imaging the strains of single-layer and bilayer ge...

ShearWaveTM Elastography

2 One of the key medical methods for detection and characterization of pathologies is the assessment of tissue stiffness by palpation. The importance of clinical assessment of tissue stiffness has been known since ancient times: In Pharonic Egypt, more than 5000 years ago, physicians practiced palpation of body parts to determine tissue stiffness. They knew that a hard mass within an organ was ...

Optical Elastography: From Theory to Clinical Applications

Spectral estimators in elastography.

Like velocity, strain induces a time delay and a time scaling to the received signal. Elastography typically uses time delay techniques to indirectly (i.e. via the displacement estimate) measure tissue strain induced by an applied compression, and considers time scaling as a source of distortion. More recently, we have shown that the time scaling factor can also be spectrally estimated and used...

Elastography: A systems approach

We present a review of elastography from a systems standard medical practice of soft-tissue palpation is based on point of view. We show that elastography can be viewed as a cascade qualitative assessment of the low-frequency stiffness of tissue. of two distinct processes. The first process involves the mapping of Pathologic changes are generally correlated with changes in the distribution of l...