Which statement best describes contrast media use in imaging?

Which statement best describes contrast media use in imaging?

• A. Diagnostic imaging procedures such as CT or MRI
• B. Bone density scanning
• C. Ultrasound without contrast
• D. Basic X-rays without contrast

Answer: (B)

Contrast media are substances given to enhance visibility of structures during imaging by changing how tissues appear on the study. They are routinely used in diagnostic imaging procedures like CT and MRI to better differentiate vessels, organs, and lesions by increasing contrast between tissues. Bone density scanning (DEXA) measures bone mineral density using X-rays and does not involve administering contrast. Ultrasound can be performed with or without contrast, but the general use of contrast media is most characteristic of CT and MRI. Basic X-rays without contrast likewise do not involve contrast agents. So the statement that best describes contrast media use is that CT or MRI procedures typically use contrast to improve visualization.

Contrast media are substances given to enhance visibility of structures during imaging by changing how tissues appear on the study. They are routinely used in diagnostic imaging procedures like CT and MRI to better differentiate vessels, organs, and lesions by increasing contrast between tissues. Bone density scanning (DEXA) measures bone mineral density using X-rays and does not involve administering contrast. Ultrasound can be performed with or without contrast, but the general use of contrast media is most characteristic of CT and MRI. Basic X-rays without contrast likewise do not involve contrast agents. So the statement that best describes contrast media use is that CT or MRI procedures typically use contrast to improve visualization.