Daniel Smutek, int3(at)lf1.cuni.cz
A presentation discusses usage of ultrasound imaging as diagnostic method in medicine. In the beginning basic physical principles of ultrasound are presented. Then we show different ultrasound findings (images) which represent basic types of ultrasound examination. Part of not reflected waves goes through the boundary and changes its direction in the same ratio as the ratio between propagation velocities in the environments in question.