Final answer:
A CT scan does not detect changing brain activity; it only provides images of the brain's structure. An MRI provides high-resolution structural images, but it's the fMRI that shows changes in brain activity over time. An EEG detects electrical activity changes in the brain.
Step-by-step explanation:
All of the following can detect changing brain activity EXCEPT a CT scan. An MRI (Magnetic Resonance Imaging) is a type of brain imaging technique that provides high-resolution images of the brain's structure but not its activity over time. An EEG (Electroencephalogram) measures electrical activity and is sensitive to the brain's activity patterns, making it suitable for detecting changes. An fMRI (Functional Magnetic Resonance Imaging) operates on the same principles as MRI, but it additionally tracks blood flow and oxygen levels to show changes in brain activity over time, making it highly effective in mapping active brain regions.
A CT scan (Computerized Tomography) provides detailed images of the brain's structure through successive transverse sections but does not provide information about active brain function or changes in activity over time like the fMRI or PET scans.