Which technique is dependent upon the release of oxygen from hemoglobin molecules?
A) PET
B) rCBF
C) MRI
D) fMRI

Question

Quizplus · Accepted Answer

fMRI (functional magnetic resonance imaging) is dependent upon the release of oxygen from hemoglobin molecules. When an area of the brain is activated, blood flow to that area increases, leading to a higher concentration of oxygenated hemoglobin. This causes changes in the magnetic properties of the blood, which can be detected by fMRI and used to create a map of brain activity. PET (positron emission tomography) and rCBF (regional cerebral blood flow) also measure blood flow, but they do not rely specifically on the release of oxygen from hemoglobin molecules. MRI (magnetic resonance imaging) is a structural imaging technique and does not measure brain activity.

Which Technique Is Dependent Upon the Release of Oxygen from Hemoglobin