Ultrasound speckle analysis based on the K distribution.
The departure of speckle magnitude from Rayleigh statistics was applied to examine insonated phantoms with both low and high concentrations of scatterers. A mathematical model, the K distribution of Jakeman, was used to characterize non-Rayleigh statistics. This model contains a parameter, alpha, which characterizes the clustering of the scattering sites in a medium. It is shown from phantom experiments that alpha is linearly proportional to the log-scaled scatterer concentration in a range from about 1 to 30 scatterers per sample volume.
Biomedical Engineering and Science Institute, Drexel University, Philadelphia, Pennsylvania 19104.
L
L
Weng
J M
JM
Reid
P M
PM
Shankar
K
K
Soetanto
D008433:Mathematics; D055585:Physical Phenomena; D010825:Physics; D014465:Ultrasonics