Search results
Radiocontrast agents are substances used to enhance the visibility of internal structures in X-ray-based imaging techniques such as computed tomography (contrast CT), projectional radiography, and fluoroscopy. Radiocontrast agents are typically iodine, or more rarely barium sulfate.
- www.ncbi.nlm.nih.gov
- › …
- › v.9(4); Oct-Dec 2019
Oct 11, 2019 · Radiocontrast media are the agents used to increase the contrast of an image, to enhance the visibility of internal structures in imaging technology. Radiocontrast media can be given orally or intravenously. The agents commonly used are barium-based (orally) and iodinated agents (intravenously).
Oct 14, 2015 · Iodinated and gadolinium-based contrast media are used on a daily basis in most radiology practices. These agents often are essential to providing accurate diagnoses, and are nearly always safe and effective when administered correctly. However, reactions to contrast media do occur and can be life threatening.
Various isotopes of radiocontrast agents are commonly used in detection, characterization and staging of diseases associated with internal organs of patients. Such agents are commonly employed in positron emission tomography (PET) imaging; each agent visualizes specific tissues with the help of different conjugated molecules.
In radiology, X-ray contrast agents such as iodinated contrast can be divided into three groups based on their impact on the final images: positive contrast, negative contrast and neutral contrast. What are Positive Contrast Agents in X-ray and CT imaging?
May 30, 2024 · Iodinated contrast media are contrast agents that contain iodine atoms used for x-ray-based imaging modalities such as computed tomography (CT). They can also be used in fluoroscopy, angiography and venography, and even occasionally, plain radiography.
May 1, 2023 · Describe the pathophysiology of contrast agent toxicity. Summarize presenting signs and symptoms that may accompany contrast agent toxicity. Review the treatment of contrast agent toxicity.
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.
Nov 1, 2023 · Radiocontrast agents offer the opportunity to dramatically increase the ability of CT and X-ray imaging to diagnose and understand disease [4, 5]. Current contrast agents, however, are associated with a high frequency of adverse effects [6], and the development of agents with improved safety and utility should be considered an immediate ...
Radiocontrast agents are compounds, compositions, or preparations aimed at modifying the X-ray absorption in a human or an animal undergoing an X-ray examination.
