title: A beam corrected estimation of the frequency dependent attenuation of biological tissues from backscattered ultrasound.
abstract: A practical and highly accurate method of estimation of the frequency-dependent slope of the acoustic attenuation coefficient, alpha 1, using backscattered ultrasound energy is presented. The influence of the focused ultrasound beam is experimentally measured and a simple method for incorporating the field effects in the estimate of alpha 1 is described. The accuracy of the estimate of alpha 1 in vitro which appears to be of the order of 10 percent, demonstrates the feasibility of in vivo applications of the technique.
mesh_terms: D000818:Animals; D055592:Biophysical Phenomena; D001703:Biophysics; D006041:Goats; D008099:Liver; D008722:Methods; D008954:Models, Biological; D014159:Transducers; D014465:Ultrasonics / Q000295:instrumentation; D014463:Ultrasonography