Simulation Of Sequential Ultrasound Imaging Based On A Generic Cardiac Model

Nowadays, cardiovascular diseases are main diseases, which threat to human life and health. With the improvement of people’s living standards and increasing aging population, the incidence and mortality of cardiovascular disease is increasing year by year. The cardiac imaging technology can provide valuable proof for the early detection, diagnosis and therapy of the cardiovascular diseases. There are a lot of research and algorithm of the cardiac imaging analysis. However, due to many factors in the process of cardiac imaging and poor reproducibility of imaging algorithm, many imaging algorithm have not been used in clinical. It is necessary to find a suitable verification method.Simulations are the useful tool for industrial processes and technology optimization.And they are also suitable for teaching and research as a relatively economical tool.They are not only used to gain understanding of systems theory and operational processes, but also used to verify various algorithms. In recent years, computational simulations based on mathematical models has become a hot research. There are a growing number of ultrasound simulation software based on different principles for different applications. Field II is a program for simulating ultrasound tranducer fields and ultrasound imaging using linear acoustics. It has been widely used in academia, industry applications.In this paper, we establish a cardiac motion model based on generic anatomical heart model. We use Field II to construct a B-mode ultrasound imaging system and generate two-dimensional image sequence of the cardiac motion model. Firstly, we briefly introduce the basic theory of ultrasound imaging and Field Ⅱ. Secondly, We discuss the ultrasonic beam processing and ultrasonic echo signal processing. We discuss the improvement of ultrasonic beam after electronic focusing, dynamic aperture and amplitude apodization. And our simulation experiment verify and contrast the quality of the algorithm. Finally, We introduce the generic anatomical heart model proposed by M. Sermesant and Philips cardiac ultrasound image sequences. And left ventricular motion model,biventricular motion model and cardiac motion model are established respectively. Then we use the B-mode ultrasound simulation system to generate two-dimensional image sequence of three kinds of motion model. Thus, they can be used by cardiac imaging analysis algorithm.