Ultrasound Imaging and Elastography

Ultrasound elastography measures how stiff or compliant biological tissues are by tracking how they deform in response to mechanical force, producing maps of tissue elasticity that conventional imaging cannot provide. Because diseased tissue—a cancerous breast lesion, a fibrotic liver, an injured tendon—often differs markedly in stiffness from healthy surrounding tissue, these maps carry diagnostic information that can reduce the need for invasive biopsies. Techniques such as shear wave imaging, which uses acoustic radiation force to generate and track propagating mechanical waves, and magnetic resonance elastography, which extends the principle to deeper structures with high spatial resolution, have expanded the clinical reach of the approach considerably. Active research is focused on standardizing measurement protocols across different scanner platforms, improving accuracy in highly heterogeneous or anisotropic tissues like muscle, and establishing quantitative stiffness thresholds that are reliable enough to guide clinical decisions.

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Keywords

Ultrasound ElastographyTissue Elasticity MappingShear Wave ImagingClinical ApplicationsSoft Tissue ElasticityMagnetic Resonance Elastography