Positron Emission Tomography Scan
This measures blood flow and metabolic rates. In the case of study on the myocardium, it can accurately distinguish between dyskinetic myocardium due to ischemia and due to infarction. In the case of study on the brain, it measures cerebral blood flow and cerebral oxygen and glucose metabolism. Cerebral metabolic rate is much lower in permanently unconscious patients.
Selected Positron Emission Tomography Scan links:
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