Computer simulation of linear and harmonic ultrasound imaging

An extensive study of computer modeling of B-mode ultrasound imaging has been carried out. Computer models for generating linear and harmonic B-mode ultrasound images were developed. The linear imaging model is based on a novel frequency domain approximation that greatly improves the computational efficiency, especially when elevational focusing is applied. The nonlinear imaging is based on numerical solutions to the KZK (Khokhlov-Zabolotskaya-Kuznetsov) equation. A parallel computing technique was applied to solve the KZK equation from rectangular sources. The accuracy of these models was established via comparison with benchmark numerical and analytical solutions, and also via direct experimental measurements. Computer models developed in this dissertation take into account nearly all aspects of ultrasound imaging: media properties, transducer configuration, frequency, bandwidth, and signal processing. The model can be a very useful tool for ultrasound researchers and manufacturers. Also in this dissertation, many examples are presented on how computer modeling can be used to understand and improve B-mode ultrasound imaging.