Artifacts in Ultrasonic Attenuation Measurements in Tissues

CEIIiiA In this paper, we first ana.ly7.ed the signal receiving system for zeamrcnent of ultrasonic attenuation. ‘Then, using three piezoelectric receivers (with ? iame Lers of 0.6, 5, and 14 mE, respectively), we ;ileasured the ultrasonic attenuation coefficients of hcart, liver, muscle, Kid:iey,and fat of pig in the frequer-cy range 1-6 to study tr.e artifacts due to phase cancellation ef Cec ts in measurements when phas-e sensitive receivers are wed. Exneriiwntal rerults are in accorriance with the analyses. Contributions of the artifacts to the wlues of i?t tenvation c oefficieritF are rsl2ted to the sizes of tt;e receivers. The at t enua t ion-f requencg nlo t c arp 2 Drc ximately straif:ht lines when mall receivers are used. ilhus, to enhance the xensuring accuracy, nhase insezsitive receivers should ?e used.