Which imaging technique commonly involves the use of contrast agents?

Computed Tomography (CT) often involves the use of contrast agents to enhance the visibility of internal structures within the body. Contrast agents, which can be iodine-based or barium-sulfate solutions, help to highlight specific areas or organs by absorbing X-rays more effectively than the surrounding tissues. This increased contrast improves the diagnostic capability of the CT images, making it easier to identify abnormalities, tumors, or issues related to blood vessels.

While other imaging techniques like X-ray and Nuclear Medicine also utilize contrast agents to some extent, they are not as commonly associated with them as CT scans. For instance, X-rays may utilize contrast in specific cases, but it’s often more limited and not a standard practice. Ultrasound primarily relies on sound waves and does not generally require the use of contrast agents, although there are specialized contrast agents available for certain types of ultrasound evaluations. Therefore, the use of contrast agents is a hallmark of CT imaging, making it the most appropriate answer in this context.