Which imaging technique is used to identify problems with blood circulation in the brain?

Which imaging technique is used to identify problems with blood circulation in the brain?

• A. MRI
• B. CT
• C. fMRI
• D. PET

Answer: (C)

Measuring blood flow and perfusion in the brain using functional imaging. Functional MRI tracks changes in blood oxygenation that occur when areas of the brain receive more blood in response to activity. This hemodynamic response reveals how well blood is being delivered to different regions. When circulation is compromised, the expected BOLD signal in affected areas is reduced or abnormal, making fMRI a direct way to identify problems with blood flow in the brain. MRI and CT mainly provide structural images rather than dynamic blood flow, so they don’t show real-time perfusion patterns. PET measures metabolic activity and can infer blood flow with tracers, but it’s not as direct or as specifically focused on the live perfusion patterns as fMRI.

Measuring blood flow and perfusion in the brain using functional imaging. Functional MRI tracks changes in blood oxygenation that occur when areas of the brain receive more blood in response to activity. This hemodynamic response reveals how well blood is being delivered to different regions. When circulation is compromised, the expected BOLD signal in affected areas is reduced or abnormal, making fMRI a direct way to identify problems with blood flow in the brain.

MRI and CT mainly provide structural images rather than dynamic blood flow, so they don’t show real-time perfusion patterns. PET measures metabolic activity and can infer blood flow with tracers, but it’s not as direct or as specifically focused on the live perfusion patterns as fMRI.