P. B. Rosnitskiy, P. V. Yuldashev, B. A. Vysokanov, V. A. Khokhlova
An equivalent source model is developed for setting boundary conditions on the parabolic diffraction equation in order to simulate ultrasound fields radiated by strongly focused medical transducers. The equivalent source is defined in a plane; corresponding boundary conditions for pressure amplitude, aperture, and focal distance are chosen so that the axial solution to the parabolic model in the f...... hiện toàn bộ