Computer Simulation of Measurement of Ultrasound Attenuation Coefficient by Broad Band Continuous-Echo Technique (Gamma Variate Method)

Computer simulation experiments were made using the gamma variate method. The method is one proposed by the authors and uses a broad band interrogating wave. The interrogating wave was assumed to be delta function in time scale. Five random scatterers at distances of 90 and 100 mm from the transducer were assumed. An attenuation coefficient proportional to the frequency (0.01 Np/mm/MHz) was also assumed. Frequencies between 0.2 and 3.2 MHz were used for the analysis. The averaged spectrum of 300 simulation experiments gave 0.00996 Np/mm/MHz which was approximately equal to the assumed value.