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The motion of scatterers in a coherence volume gives rise to complex field fluctuations that form the basis for OCTA signals. The contributions to the complex field are shown at two different points in time (t and t + τ). (A,B) Field fluctuations due to dynamic scatterers in a coherence volume. (C,D) Field fluctuations due to a combination of static (blue) and dynamic (red) scatterers in a coherence volume.
