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Based on beamlet decomposition of wave field and Green's function, we formulated an amplitude correction method in angle domain. The formulation relates the local image matrix (LIM), which bears the footprints of the acquisition aperture and propagation path effects, and the local scattering matrix (LSM), which is directly related to the medium property. From the formulation, two types of amplitude correction are proposed: one is the correction for common reflection-angle image for AVA analysis. The other is the correction for total strength image. From the imaging results of the four-layer model and the SEG/EAGE model, we see significant improvement in amplitude fidelity and image quality.

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The movement of V AB can be used as an index of DE among the normal population in the supine position. Its application in patients requires further study.