When comparing fMRIs to PET scans, you can see that:
A) PET scans provide a much sharper picture than fMRIs.
B) PET scans use less radioactive glucose than fMRIs.
C) fMRIs provide a picture of brain activity averaged over seconds rather than the several minutes that PET scans require.
D) PET scans can be used to study the details of much smaller brain structures than fMRIs.

Question

Quizplus · Accepted Answer

fMRIs provide a picture of brain activity averaged over seconds rather than the several minutes that PET scans require. This implies that fMRIs are faster than PET scans at revealing information about brain activity. However, none of the other options are true. PET scans use a radioactive substance in the form of glucose, which is not used by fMRIs. PET scans can be used to study details of brain structures, but usually larger structures rather than smaller ones. Finally, fMRIs are often as sharp or sharper than PET scans.

When Comparing FMRIs to PET Scans, You Can See That