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fMRI images the brain tissues with respect to ______(a) density(b) thickness(c) time(d) blood flowI got this question by my college professor while I was bunking the class.The above asked question is from FMRI in chapter Diagnostic Investigation via Imaging Techniques of Clinical Science

Answer»

The correct answer is (c) time

To elaborate: A fMRI scan MEASURES the amount of OXYGEN used by the body. In ORDER to MEASURE the oxygen used up, a continuous scan is done every few seconds, mostly within a span of 2 – 5 seconds. Thus, the images received are a function of time.



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