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Narrow Size Distribution of Microbubbles for Enhancement of Harmonic Imaging

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An ultrasound microbubble contrast agent is a promising technique in clinical diagnosis because ultrasound in combination with microbubbles enhances the ultrasound backscatter to produce an increased contrast images. In this study, we developed phospholipid-based microbubbles showing a relatively narrow size distribution of 0.8–1.3 μm. The optimal resonance frequency of developed microbubbles was determined to be 2.5–3.0 MHz by measuring echo signals at various frequencies. Ultrasound harmonic imaging was performed in a vessel phantom at the optimal resonance frequencies. Microbubble contrast-enhanced ultrasound images visualized a vessel tube clearly and demonstrated much improved image quality, compared to the control. In conclusion, the ultrasonography in the harmonic mode is capable of maximally resonating micrbubbles with a narrow size distribution at a specific frequency for enhanced ultrasound imaging.
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Keywords: HARMONIC MODE; LIPOSOME; MICROBUBBLE; RESONANCE FREQUENCY; ULTRASOUND CONTRAST AGENT

Document Type: Research Article

Publication date: May 1, 2013

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  • Journal of Biomedical Nanotechnology (JBN) is a peer-reviewed multidisciplinary journal providing broad coverage in all research areas focused on the applications of nanotechnology in medicine, drug delivery systems, infectious disease, biomedical sciences, biotechnology, and all other related fields of life sciences.
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