Ultrasound Contrast
Ultrasound Contrast - Related Videos
10:39
Contrast Imaging in Mouse Embryos Using High-frequency Ultrasound
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Cited by 4 •
2015
Here, we present a protocol to inject ultrasound microbubble contrast agents into living, isolated late-gestation stage murine embryos. This method enables the study of perfusion parameters and of vascular molecular markers within the embryo using contrast-enhanced high-frequency ultrasound imaging.
09:19
Contrast Enhanced Ultrasound Imaging for Assessment of Spinal Cord Blood Flow in Experimental Spinal Cord Injury
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Cited by 16 •
2015
Contrast Enhanced Ultrasound imaging is a reliable in-vivo tool for quantifying spinal cord blood flow in an experimental rat spinal cord injury model. This paper contains a comprehensive protocol for application of this technique in association with a contusion model of thoracic spinal cord injury.
14:10
Contrast Ultrasound Targeted Treatment of Gliomas in Mice via Drug-Bearing Nanoparticle Delivery and Microvascular Ablation
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Cited by 15 •
2010
Insonation of microbubbles is a promising strategy for tumor ablation at reduced time-averaged acoustic powers, as well as for the targeted delivery of therapeutics. The purpose of the present study is to develop low duty cycle ultrasound pulsing strategies and nanocarriers to maximize non-thermal microvascular ablation and payload delivery to subcutaneous C6 gliomas.
06:49
Phase Contrast and Differential Interference Contrast (DIC) Microscopy
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Cited by 26 •
2008
This protocol highlights the principles and practical applications of Phase and Differential Interference Contrast (DIC)...
14:20
High-frequency Ultrasound Imaging of the Abdominal Aorta
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2023
Source: Amelia R. Adelsperger, Evan H. Phillips, and Craig J. Goergen, Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana High-frequency ultrasound systems are used to acquire high resolution images. Here, the use of a state-of-the-art system will be demonstrated to image the morphology and hemodynamics of small pulsatile arteries and veins found in mice and rats. Ultrasound is a relatively inexpensive, portable, and versatile method for the noninvasive...
FAQs
Ultrasound contrast relies on the bubbles’ response to an acoustic field, not simply on passive brightness. As pressure changes, each bubble expands and contracts, and this oscillation generates nonlinear echoes that differ from ordinary tissue signals. Those echoes increase signal detection, allowing the imaging system to identify contrast-enhanced regions more clearly against surrounding tissues, fluids, or blood.
Shell composition is an important design feature because it stabilizes the gas-filled microbubbles used for imaging. The overview identifies lipid, protein, and polymer materials as shell options, showing that agents can be engineered with different stabilizing structures. This bioengineering choice supports development of contrast agents for diagnostic imaging and image-guided therapy.
Contrast-enhanced imaging adds a signal source with strong, nonlinear echoes to the acoustic scene. This extra signal can sharpen the difference between tissues, fluids, and blood when their conventional ultrasound appearance is insufficiently distinct. The resulting improvement is especially relevant to visualizing vascular structure and perfusion, where detecting blood-related signals matters.
During imaging, the contrast agent is exposed to the ultrasound acoustic field, which drives the microbubbles to expand and contract. The resulting nonlinear echoes are detected as enhanced signal from regions containing the agents. This workflow connects acoustic stimulation with real-time visualization, supporting assessment of blood flow, tissue perfusion, or vascular structure.
It can provide real-time views of blood flow, tissue perfusion, and vascular structure. These readouts help distinguish whether a region is associated with circulating blood, receives perfusion, or contains vessels that conventional ultrasound may show poorly. In bioengineering, this makes the technique useful for linking engineered imaging agents with observable biological features.
Engineered microbubbles can serve as a platform for studying ultrasound-triggered drug delivery and other image-guided therapies. Their acoustic response provides a way to pair visualization with an applied ultrasound field, while their engineered design connects the agent to therapeutic research. This diagnostic and treatment context makes the topic relevant to bioengineering as well as medical imaging.