What is the purpose of using contrast media in CT imaging?

The purpose of using contrast media in CT imaging is primarily to enhance the differentiation of tissues. Contrast agents help to highlight differences in tissue density, allowing for better visualization of specific areas within the body. This differentiation is crucial for identifying abnormalities, such as tumors, cysts, and other pathological conditions that may not be as easily visible without the use of contrast.

By increasing the contrast between different tissues—like blood vessels and surrounding tissues or between different organ structures—radiologists can make more accurate diagnoses. For instance, iodine-based contrast agents are commonly used to visualize vascular structures or enhance the clarity of organ scans, facilitating a more comprehensive understanding of the patient's condition.

The other options do not align with the primary purpose of contrast media. Increasing radiation dose is not a goal in CT imaging, as minimizing exposure is essential for patient safety. Decreasing scan time is primarily influenced by advancements in technology and protocol efficiency rather than the use of contrast. Image storage is linked to the technical aspects of the imaging system and does not pertain to the application of contrast in enhancing image quality.