Question

a(n) ______ produces images using the oxygen flow in the blood to see active areas of the brain. mri ct pet fmri

Explanation:

fMRI (functional - Magnetic Resonance Imaging) measures brain activity by detecting changes associated with blood flow. It uses the fact that active areas of the brain consume more oxygen, and the oxygen - rich blood has different magnetic properties. MRI is a general imaging technique for body structures, CT uses X - rays for imaging, and PET uses radioactive tracers for imaging.

Answer:

D. fMRI