Compared with positron emission tomography (PET)scans,functional magnetic resonance imaging (fMRI)provides
A)more information about brain activity.
B) better structural resolution.
C) fewer side effects.
D) more economical imaging.

Question

Compared with positron emission tomography (PET)scans,functional magnetic resonance imaging (fMRI)provides 
A)more information about brain activity. 
B) better structural resolution.​ 
C) fewer side effects.​ 
D) more economical imaging.​

Quizplus · Accepted Answer

Functional magnetic resonance imaging (fMRI) provides more information about brain activity than positron emission tomography (PET) scans. While PET scans measure the metabolic activity of brain cells by detecting the radioactive tracer, fMRI measures the amount of oxygen in the blood flowing to different parts of the brain as a proxy for brain activity. This allows for more detailed mapping of brain function and connectivity. However, PET scans can provide more accurate information about the biochemical processes in the brain.

Compared with Positron Emission Tomography (PET)scans,functional Magnetic Resonance Imaging (FMRI)provides