Abstract: Ultrasonic attenuation and velocity were measured for six fresh pig tissues:blood vessel, brain, heart, liver, spleen and kidney by using pulse insertion method.
Frequency dependence of attenuation has been found to be nearly linear, with the power falling in the range from 0.96 to 1.39 over the 1-13 MHz at 37℃.
Velocity dispersion has been observed for all of the six tissues studied and their average values were 0.11-0.38 m/s. MHz for frequency range from 5 to 13 MHz at 37℃.
Temperature effect over the 7-37℃ range for brain was also studied:velocity at 1 MHz has positive temperature coefficient with average value 1.3 m/s℃ and attenuation at 1, 3, 5 MHz decreases with temperature.
Velocity for six tissues studied was an approximately linear function of their whole protein content. Every unit protein% concentration raises velocity by about 2.9m/s at 5 MHz, 37℃.