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Table 1 Illustration of the different steps of the GASM

From: Simulation of ultrasound nonlinear propagation on GPU using a generalized angular spectrum method

p0P0 → [FT]

For each z point:

P0P1 → [rotation kernel]

P1p1(z) → [IFT]

Compute βp12 → [βp12 kernel]

βp12 → F (βp12) → [FT]

Rotate F (βp12) → [rotation kernel]

Compute integral I → [integral kernel]

IP2 → [rotation kernel]

P2p2(z) → [IFT]

  1. The different FTs, IFTs, and kernels are represented in square brackets.