Ultrasonically modulated polymeric devices for delivering compositions Academic Article uri icon


  • This patent describes a method and system to determine simultaneously the attenuation coefficient of tissue and scatterer heterogeneity index in tissue, using a B-scan image with optimal time-variable gain compensation. The system employs the peaks of echo envelopes in a B scan. A ratio of• fluctuations to the steady component is used to describe the heterogeneity of tissue, and the gain function that produces a minimum fluctuation in the steady component ratio is used as a measure of the attenuation coeffi-cient.--RCW

publication date

  • January 1, 1989