
Chemical substances that improve the visibility of specific organs, tissues or blood vessel during a diagnostic imaging investigation are known as contrast agents. These substances are administered directly through veins, arteries, and joints or consumed orally. X-ray and computed tomography (CT) imaging exams makes use of iodinated and barium based contrast agents, whereas, Gadolinium-based contrast agents are preferred in MRI (Magnetic Resonance Imaging). These substances improve the reporting or accuracy of how internal structures of body are working and any associated abnormalities. Ultrasound scans makes use of special contrast agents called microbubbles which strongly interact with the ultrasound beam and enhances the details of heart, liver and kidney.