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This article addresses the problem of calculating the relative elasticity of materials by using ultrasound elastography. The needed procedure to compute an elastogram through the freehand method is presented, using some algorithms reported in the literature to compute displacements, deformations, and normalization of the elastogram image. Using ultrasound frames from both, phantoms and biological tissues available at web sites, the reliability of the relative elasticity information obtained with such algorithms is studied, based on the quality inferred from the signal to noise ratio of the elastogram. The result of this analysis shows the need for new algorithms providing information about the hardness of tissues, but being also reliable and easy to interpret so that they can be used in the clinical practice.

Cálculo de elasticidad relativa de materiales mediante elastografía ultrasónica