Microbubble Contrast Agent
Microbubble Contrast Agent - Related Videos
06:10
Injection of Microbubbles into Isolated Mouse Embryos: A Technique to Deliver Microbubble Contrast Agents into the Vasculature of Living Murine Embryos
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2025
This video demonstrates a procedure to inject microbubble contrast agents into an isolated late gestation stage mouse embryo. The microbubble contrast agent-based ultrasound imaging helps visualize and characterize the vascular environment of the embryo.
11:27
Preparation and In Vitro Characterization of Dendrimer-based Contrast Agents for Magnetic Resonance Imaging
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Cited by 5 •
2016
This protocol describes the preparation and characterization of a dendrimeric magnetic resonance imaging (MRI) contrast agent that carries cyclen-based macrocyclic chelates coordinating paramagnetic gadolinium ions. In a series of MRI experiments in vitro, this agent produced an amplified MRI signal when compared to the commercially available monomeric analogue.
06:54
MR Molecular Imaging of Prostate Cancer with a Small Molecular CLT1 Peptide Targeted Contrast Agent
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Cited by 3 •
2013
To demonstrate MR cancer molecular imaging with a small peptide targeted MRI contrast agent specific to clotted plasma proteins in tumor stroma in a mouse prostate cancer model.
07:15
In vivo Macrophage Imaging Using MR Targeted Contrast Agent for Longitudinal Evaluation of Septic Arthritis
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Cited by 2 •
2013
We demonstrate how to perform macrophage MR imaging using ultrasmall superparamagnetic contrast agent (USPIO) in septic arthritis, allowing an initial and longitudinal in vivo non-invasive evaluation of macrophages infiltration and an assessment of therapy efficacy.
08:24
Introduction to the Ultrasound Targeted Microbubble Destruction Technique
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Cited by 19 •
2011
Ultrasound Targeted Microbubble Destruction (UTMD) can be used to direct site-specific delivery of bioactive molecules, including therapeutic genes, to target organs accessible to ultrasound, such as the heart and liver1-6.
FAQs
The key signal comes from the gas-filled microspheres’ response to ultrasound. Their compressible cores oscillate when exposed to the waves, unlike the surrounding tissue. This difference produces strong echoes that increase contrast between blood-containing regions and adjacent structures, making vascular flow and perfusion more conspicuous during imaging.
The gas core gives each microsphere a compressible center that responds distinctly to ultrasound energy. As the core oscillates, it generates echoes that would not arise with the same strength from surrounding tissue alone. This acoustic behavior enables the imaging system to distinguish contrast-enhanced blood regions from nearby anatomical structures.
Because the bubbles remain largely within the vascular space, their distribution corresponds closely to circulating blood rather than freely spreading through surrounding tissue. Imaging can therefore highlight blood flow, vascularity, and tissue perfusion while the bubbles circulate. This property is particularly relevant when clinicians evaluate how blood reaches organs or selected lesions.
The agent is injected while ultrasound imaging is performed, allowing the circulating microspheres to respond to the ultrasound waves in real time. Their enhanced echoes are observed as they pass through the bloodstream and relevant tissues. The resulting images can then be used to evaluate blood flow, perfusion, or vascularity during the examination.
Clinical imaging may use this approach to assess cardiac function, vascularity, organ perfusion, and selected lesions. The bubbles’ circulation makes it possible to observe blood-related changes as imaging proceeds, rather than relying only on static anatomical appearance. Its value is greatest when the diagnostic question depends on how blood moves through or reaches a region.
Microbubble contrast agents provide a blood-pool imaging option that can complement other contrast media. Their largely intravascular behavior supports assessment of flow and perfusion, while their ultrasound response improves visibility during real-time scanning. Clinicians can therefore use them when enhanced evaluation of circulation or vascularity is needed alongside the information provided by other imaging approaches.