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Figure 2 The time course of individual QW7437 microbubble velocities in four arterioles (a), vessel diameter between 13 µm and 29 µm) and in five capillaries (b), vessel diameter between 5 µm and 8 µm). Open squares show microbubbles with a transient stoppage ( 0.1 s stoppage at one site), and small closed squares show microbubbles without it. In a, only one microbubble showed a stoppage for 0.27 s to a terminal arteriole at 465 s after the administration. In b, two microbubbles showed a transient stoppage in capillaries for 0.37 s and 0.40 s, respectively.
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