Final answer:
A limitation of computerized tomography (CT) is that it provides an image of the structure of the brain rather than its activity. CT scans use X-rays to create a detailed two-dimensional view of the scanned area. Techniques like positron emission tomography (PET) scans or functional magnetic resonance imaging (fMRI) are used to image brain activity.
Step-by-step explanation:
A limitation of computerized tomography (CT) is that it provides an image of the structure of the brain rather than its activity. CT scans use X-rays to create a detailed two-dimensional view of the scanned area. While this provides valuable information about the structure of the brain and allows physicians to measure the size of masses with precision, it does not directly show brain activity.
For imaging brain activity, techniques like positron emission tomography (PET) scans or functional magnetic resonance imaging (fMRI) are used. PET scans involve the use of a mildly radioactive tracer that shows blood flow and activity in different regions of the brain. On the other hand, fMRI uses magnetic fields to measure changes in blood oxygenation as an indicator of brain activity.
Both of these techniques provide information about the brain's activity in addition to its structure, unlike CT scans which focus primarily on the structure.