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Performance comparison between no-slot, 4.1 and slotted, 4.2, four-channel devices. Both devices had the same channel dimensions and total wall width (see Table I and Fig. 3 for dimensions). RBC depletion was averaged from three replicates. The average zero-voltage (transducer off) RBC depletion for design 4.1 and design 4.2 were 49.6% and 50.7%, respectively. Operating frequencies for designs 4.1 and 4.2 were 605 and 597 kHz, respectively.
