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- W2012068905 abstract "The aim of this study was to prepare air-filled nanocapsules intended ultrasound contrast agents (UCAs) with a biodegradable polymeric shell composed of poly(d,l-lactide-co-glycolide) (PLGA). Because of their size, current commercial UCAs are not capable of penetrating the irregular vasculature that feeds growing tumors. The new generation of UCAs should be designed on the nanoscale to enhance tumor detection, in addition, the polymeric shell in contrast with monomolecular stabilized UCAs improves the mechanical properties against ultrasound pressure and lack of stability. The preparation method of air-filled nanocapsules was based on a modification of the double–emulsion solvent evaporation technique. Air-filled nanocapsules with a mean diameter of 370 ± 96 nm were obtained. Electronic microscopies revealed spherical-shaped particles with smooth surfaces and a capsular morphology, with a shell thickness of ∼50 nm. Air-filled nanocapsules showed echogenic power in vitro, providing an enhancement of up to 15 dB at a concentration of 0.045 mg/mL at a frequency of 10 MHz. Loss of signal for air-filled nanocapsules was 2 dB after 30 min, suggesting high stability. The prepared contrast agent in this work has the potential to be used in ultrasound imaging." @default.
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- W2012068905 date "2011-10-01" @default.
- W2012068905 modified "2023-10-01" @default.
- W2012068905 title "Preparation and in vitro evaluation of poly(d,l-lactide-co-glycolide) air-filled nanocapsules as a contrast agent for ultrasound imaging" @default.
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- W2012068905 doi "https://doi.org/10.1016/j.ultras.2011.04.003" @default.
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