Question

fMRI images the brain tissues with respect to ______

(a) density

(b) thickness

(c) time

(d) blood flow

I 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 1

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.