Which of the following best describes a major limitation of CAT scans?

• A. They can only be used on children
• B. They require long wait times for results
• C. They involve exposure to potentially harmful radiation
• D. They fail to detect any form of brain injury

Answer: (C)

A major limitation of CAT scans is their involvement of exposure to potentially harmful radiation. CAT scans, or computed tomography scans, use X-rays to create detailed images of the body's internal structures, which includes the brain. This means that patients undergoing this procedure are exposed to ionizing radiation, which can increase the risk of developing cancer over time.

While medical professionals often weigh the risks and benefits when recommending a CAT scan, the potential harm from radiation exposure is a significant concern, especially for vulnerable populations such as children or individuals requiring multiple scans. This limitation makes clinicians cautious about the frequency of their use, particularly for non-emergency situations where alternative imaging techniques, which do not involve radiation (like MRI), may be available.

The other options provided do not accurately reflect significant limitations of CAT scans. They can be used for people of various ages, results are typically available relatively quickly, and CAT scans are generally effective in detecting many forms of brain injuries.