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Detection of localized magnetic microspheres in a mixture ( Media 3 (540.7KB, AVI) ): A and C) B-mode OCT images of a plastic tube filled with a mixture of non-magnetic MSs + magnetic MSs + PBS. B and D) Magnified images from the blue boxes (A and C). Non-modulating microspheres appear as cloud-like scatterers, which modulating microspheres show distinct transients. The external AC magnetic field frequency was 100 Hz.
