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Slow-time PA profiles for (a) a uniform pattern (all on) and (b) the optimized pattern displayed on the DMD. The raw single-shot data (yellow) was filtered at 3 Hz (blue). The insets show the particles within the tube (Media 1 and 2, respectively). The position of the transducer focus is indicated by the white, dotted line. The position of the first particle is indicated by the red arrows. Note that the signal in (a) is similar to the noise level in (b).
