Abstract
The characteristics of phantoms that mimic first- and second-order statistics of ultrasonic pulse distortion produced by the human abdominal wall are described. The phantoms consist of a fat-mimicking background in which aberrating spheres of different size are randomly distributed. The focus degradation produced by the phantoms resembles the degradation measured for abdominal wall specimens but is greater than that produced by specimens with similar aberration statistics. Compared to silicone rubber sheets that are often used as thin phase screens, these phantoms provide more realistic aberration for controlled studies of focusing through tissue.
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