Why Did Researchers Put A Dead Fish In An fMRI?
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Key Facts In This Video
CAT or CT Scans involve taking a series of X-ray images around the head and combining them to get an overall image. The resolution isn't very high, but they can be used to see major structural problems, like tumors. 00:13
MRIs involve applying a combination of magnetic fields and radio-frequency energy waves to the brain, which cause hydrogen atoms to emit energy. The device reads this energy to create an image with higher resolution than a CT scan. 00:40
fMRI uses a similar approach to MRI, but uses the contrasts between oxygenated and unoxygenated blood to identify changes of blood flow in the brain, and thereby identify its most active areas. 01:33