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  2. Radiocontrast agent - Wikipedia

    en.wikipedia.org/wiki/Radiocontrast_agent

    Radiocontrast agent. 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.

  3. Contrast agent - Wikipedia

    en.wikipedia.org/wiki/Contrast_agent

    A contrast agent(or contrast medium) is a substanceused to increase the contrastof structures or fluids within the body in medical imaging.[1] Contrast agents absorb or alter external electromagnetismor ultrasound, which is different from radiopharmaceuticals, which emit radiationthemselves. In X-rayimaging, contrast agents enhance the ...

  4. Iodinated contrast - Wikipedia

    en.wikipedia.org/wiki/Iodinated_contrast

    Iodinated contrast. Contrast CT of a patient with brain metastases from breast cancer, before (left) and after (right) injection of iodinated contrast. Iodinated contrast is a form of water-soluble, intravenous radiocontrast agent containing iodine, which enhances the visibility of vascular structures and organs during radiographic procedures.

  5. Computed tomography angiography - Wikipedia

    en.wikipedia.org/wiki/Computed_tomography...

    Computed tomography angiography (also called CT angiography or CTA) is a computed tomography technique used for angiography —the visualization of arteries and veins —throughout the human body. Using contrast injected into the blood vessels, images are created to look for blockages, aneurysms (dilations of walls), dissections (tearing of ...

  6. CT scan - Wikipedia

    en.wikipedia.org/wiki/CT_scan

    CT perfusion imaging is a specific form of CT to assess flow through blood vessels whilst injecting a contrast agent. [21] Blood flow, blood transit time, and organ blood volume, can all be calculated with reasonable sensitivity and specificity . [ 21 ]

  7. CT pulmonary angiogram - Wikipedia

    en.wikipedia.org/wiki/CT_pulmonary_angiogram

    The black areas on either side are the lungs, with around it the chest wall. A CT pulmonary angiogram (CTPA) is a medical diagnostic test that employs computed tomography (CT) angiography to obtain an image of the pulmonary arteries. Its main use is to diagnose pulmonary embolism (PE). [1] It is a preferred choice of imaging in the diagnosis of ...

  8. Contrast-enhanced ultrasound - Wikipedia

    en.wikipedia.org/wiki/Contrast-enhanced_ultrasound

    Contrast-enhanced ultrasound is regarded as safe in adults, comparable to the safety of MRI contrast agents, and better than radiocontrast agents used in contrast CT scans. The more limited safety data in children suggests that such use is as safe as in the adult population. [2]

  9. Arthrogram - Wikipedia

    en.wikipedia.org/wiki/Arthrogram

    3-13k. An arthrogram is a series of images of a joint after injection of a contrast medium, usually done by fluoroscopy or MRI. The injection is normally done under a local anesthetic such as Novocain or lidocaine. The radiologist or radiographer performs the study using fluoroscopy or x-ray to guide the placement of the needle into the joint ...

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