| http://www.w3.org/ns/prov#value | - Still another aspect of the present invention is a method for increasing the in vivo half-life of microbubbles, comprising providing a spray dried formulation in combination with a gas osmotic agent that permeates the formulation, and combining the formulation with an aqueous phase to form microbubbles having a half-life in vivo of at least about 20 seconds.
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