Both PET and fMRI technologies rely on:
A)the fact that active areas of the brain have higher metabolic rates and require greater blood flow.
B)response time to active areas of electrical impulses.
C)usage of radioactive chemicals.
D)usage of magnets.

Question

Quizplus · Accepted Answer

Both PET and fMRI technologies rely on the fact that active areas of the brain have higher metabolic rates and require greater blood flow. PET uses radioactive tracers to measure glucose uptake and fMRI measures changes in blood oxygenation. Both of these methods rely on the increased blood flow to active brain regions. Options B and C are not correct as they do not accurately describe the technology used in PET and fMRI. Option D is only accurate for fMRI, not PET.

Both PET and FMRI Technologies Rely On