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A contrast agent (or contrast medium) is a substance used to increase the contrast of structures or fluids within the body in medical imaging. [1] Contrast agents absorb or alter external electromagnetism or ultrasound , which is different from radiopharmaceuticals , which emit radiation themselves.
A contrast medium for medical ultrasonography is a formulation of encapsulated gaseous microbubbles [64] to increase echogenicity of blood, discovered by Dr. Raymond Gramiak in 1968 [65] and named contrast-enhanced ultrasound. This contrast medical imaging modality is used throughout the world, [66] for echocardiography in particular in the ...
Contrast-enhanced ultrasound (CEUS) is the application of ultrasound contrast medium to traditional medical sonography. Ultrasound contrast agents rely on the different ways in which sound waves are reflected from interfaces between substances. This may be the surface of a small air bubble or a more complex structure.
The most common example of molecular imaging used clinically today is to inject a contrast agent (e.g., a microbubble, metal ion, or radioactive isotope) into a patient's bloodstream and to use an imaging modality (e.g., ultrasound, MRI, CT, PET) to track its movement in the body.
Contrast radiography uses a radiocontrast agent, a type of contrast medium, to make the structures of interest stand out visually from their background. Contrast agents are required in conventional angiography, and can be used in both projectional radiography and computed tomography (called contrast CT). [13] [14]
Pages in category "Ultrasound contrast agents" The following 2 pages are in this category, out of 2 total. This list may not reflect recent changes. P.
Ultrasound contrast agent, contrast for MRI and CT, and Oxygen Therapeutic - Oxygen Flow Enhancer: Discontinued clinical development, continuing pre-clinical development [32] [27] C 8 BrF 17, and C 10 F 21 Br: 142, 185: Droplet: Perfluorooctyl bromide and perfluorodecylbromide: Oxygent: Alliance Pharmaceuticals: Oxygen Therapeutic - Blood ...
uses ultrasound to produce images from within the body; video link: X-ray: uses X-rays to produce images of structures within the body; video link: Contrast media for X-rays: to provide a high contrast image of the details of the viscera under study; e.g. salts of heavy metals, gas like air, radio-opaque dyes, organic iodides, etc ...
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