What is the role of contrast agents in imaging studies?

The role of contrast agents in imaging studies is fundamentally to increase the visibility of structures or organs. Contrast agents are substances that enhance the contrast of structures or fluids within the body in medical imaging. By introducing these agents, clinicians can better differentiate between normal and abnormal tissues or identify certain organs, blood vessels, or other structures that may not be clearly visible with standard imaging techniques. For example, in a CT scan, contrast material may be injected into a vein or ingested to provide a clearer view of the gastrointestinal tract or to outline blood vessels, making it easier to detect conditions such as tumors or vascular diseases. This enhancement facilitates more accurate diagnoses and treatment planning, showcasing the critical role of contrast agents in radiology.