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Which element does the fMRI target when taking the scan?

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Which element does the fMRI target when taking the scan?

(a) Hydrogen

(b) Oxygen

(c) Carbon

(d) Nitrogen

I had been asked this question in an online quiz.

My enquiry is from FMRI in portion Diagnostic Investigation via Imaging Techniques of Clinical Science

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Correct choice is (b) Oxygen

The explanation is: In an MRI, the scans are taken with the help of the Hydrogen atom but in fMRI, the blood oxygen, i.e. the oxygen content of the blood is targeted. It measures the oxygen used up by the various tissues in the organs and images that as the Functional MRI.

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