What is the main purpose of administering iodinated contrast during CT scans?

The primary purpose of administering iodinated contrast during CT scans is to enhance the visibility of vascular structures and duct systems within the body. Iodinated contrast agents are particularly effective in improving the differentiation between blood vessels, lymphatic systems, and surrounding tissues. This enhancement allows radiologists to obtain a clearer view of the anatomy and any potential abnormalities, including blockages or abnormal growths in the vascular and ductal systems.

While other options may present some benefits in certain contexts, they do not capture the central role of iodinated contrast. For instance, while bone imaging can be improved with specific techniques, iodinated contrast is not particularly designed for enhancing bone visualization. Similarly, tumor detection in soft tissues can benefit from contrast but is primarily related to the ability to distinguish between different tissue types rather than the main function of the contrast itself. Diagnosing respiratory conditions may involve imaging, but iodinated contrast is not typically necessary for assessing lung pathology; other imaging modalities or techniques are more relevant in those cases.