What imaging tests are used to examine the structure of the brain for abnormalities?

The correct choice, which focuses on the use of imaging tests that specifically examine the structure of the brain for abnormalities, is indeed CAT scan and MRI.

A CAT scan, also known as a CT scan, uses X-ray technology to create detailed cross-sectional images of the brain, allowing for the evaluation of the brain's structure and the detection of various abnormalities, such as tumors, bleeding, and structural changes due to injury or disease.

MRI, or Magnetic Resonance Imaging, provides even more detailed images of brain structures by using strong magnetic fields and radio waves. This method is particularly effective in visualizing soft tissues, making it invaluable for assessing brain conditions such as multiple sclerosis, tumors, and other neurological disorders.

While other options may include imaging tests, they either focus on different aspects of brain function or are not as suitable for structural evaluation. Understanding these specific capabilities clarifies why CAT scans and MRIs are optimal choices for examining brain structure abnormalities.