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Major topics in medical ultrasound rest on the physics of wave propagationthrough tissue. These include fundamental treatments of backscatter, speed ofsound, attenuation, and speckle formation. Each topic has developed its ownrich history, lexicography, and particular treatments. However, there is ampleevidence to suggest that power law relations are operating at a fundamentallevel in all the basic phenomena related to medical ultrasound. This reviewpaper develops, from literature over the past 60 years, the accumulatingtheoretical basis and experimental evidence that point to power law behaviorsunderlying the most important tissue-wave interactions in ultrasound and inshear waves which are now employed in elastography. The common framework ofpower laws can be useful as a coherent overview of topics, and as a means forimproved tissue characterization.

Power laws prevail in medical ultrasound