Using the K-Distribution and Phase Statistics to Examine in vivo Breast and Liver Data
Original Item ID
From recent research, it appears the K-distribution is much more appropriate when used to model the envelope of ultrasonic backscatter from tissue than applying the more common Rayleigh model. In addition to envelope statistics, there is valuable information about the spatial arrangement of the scatterers within the insonated medium found in the phase statistics. The K-distribution in concert with phase information provides knowledge of the underlying ultrasonic scattering useful in identifying the physical characteristics of the tissue. Applying similar techniques that were used previously for confirming the applicability of the K-distribution as a model for the ultrasonic backscatter from breast tissue, we investigate the models use for in vivo liver data. Using the fact that many pathological growths have spatially definable characteristics, phase statistics are investigated to provide information to identify tissue characteristics. The results show the Kdistribution model fits and predicts the envelope of the backscatter very well. In addition, certain spatially-related scattering characteristics are identifiable from the phase information.