“…While this method is relatively efficient when compared to more common modelling schemes, such as finite difference or finite element, depending on the size of the model and acquisition geometry, calculation of wavefields with our method can still be computationally expensive, even though the Born approximation already made the calculations significantly faster (Kaslilar, 2007) than the accurate solution of the wave equation (Riyanti and Herman, 2005). The use of wave number integral approach along with the Born approximation for modelling wave scattering due to inhomogeneities is previously examined by several studies, such as Lepage and Schmidt (2003), Malovichko et al (2017), Huang (2020) and Minato et al (2020). To accelerate the calculations further, we make use of parallel programming techniques for the calculation of the wavefields (Harmankaya and Kaslilar, 2019).…”