Bone sonometry: reducing phase aberration to improve estimates of broadband ultrasonic attenuation.

摘要: Previous studies suggest that phase cancellation at the receiving transducer can result in overestimation of frequency dependent ultrasonic attenuation bone, a quantity has been shown to correlate with bone mineral density and ultimately osteoporotic fracture risk. Evidence supporting this interpretation is provided by insensitive processing data, which appear reduce apparent overestimates attenuation. The present study was designed clarify components underlying aberration artifacts such through-transmission measurements conducting systematic simplest possible test objects capable introducing aberration. Experimental results are presented for Lexan phantom over range 300–700kHz Plexiglas 3–7MHz range. Both phantoms were flat parallel plates featuring step discontinuity milled into one their initially sides. through-transmitted signals received 0.6mm diam...