There is an interest in simulations of ultrasonic Non Destructive Testing (NDT), as they can help designing
inspection techniques and interpreting measurements. Numerical simulation methods and semi-analytical simulation
methods can be distinguished. The former category includes Finite Element methods and Boundary Element
methods. The latter relies on various exact or approximate analytical models that yield expressions of the fields
radiated by probes and diffracted by flaws. Compared to numerical methods, semi-analytical methods allow for
significantly faster computations but tend to be less generic and limited by their approximations.