Spiral arrangement of elements of two-dimensional ultrasonic therapeutic arrays as a way of increasing the intensity at the focus

The emergence of new ways of applying high-power ultrasound in medicine that are based on using nonlinear fields and shock-wave operation modes requires a substantial increase in the power of phased arrays used for the generation of these fields. The need to develop a new generation of similar arrays based on employing densely packed elements arranged spirally on their surfaces is shown.