What type of contrast is typically used for CT exams?

Iodine-based contrast is commonly used for CT exams due to its high atomic number, which provides excellent contrast against the surrounding tissues. The iodine absorbs X-rays more effectively than the surrounding structures, creating clearer images that enhance the visualization of various organs and blood vessels. This property is essential for diagnosing conditions such as tumors, vascular abnormalities, and internal bleeding.

Water-based contrast agents may be used in certain specific circumstances, particularly when a more neutral product is needed, but they do not offer the same level of enhancement as iodine-based agents. Barium sulfate is typically used in gastrointestinal studies rather than in CT imaging of other body parts. Carbon dioxide contrast can be utilized in specific situations, especially in vascular imaging, but it is not the primary choice for standard CT scans. Therefore, iodine-based contrast remains the gold standard due to its effectiveness and widespread application.