“…1, is defined in the original space (x, y, z, t) and is valid for a linear elastic isotropic and homogeneous continuum. Using the Helmholtz decomposition and a threefold Fourier transformation one obtains a system of four decoupled ordinary differential equations which can be solved with an exponential approach in the image space (k x , k y , z, ω) [4]. This approach is referred to as integral transform method (ITM).…”