June Will Soon Undergo a Magnetic Resonance Imaging (MRI)scan

Multiple Choice

June will soon undergo a magnetic resonance imaging (MRI) scan.Which of the following will most likely occur during the scan?

A) Narrow X-ray beams will pass through June's head, and the amount of radiation absorbed by each beam will be measured.
B) A radioactive isotope will be injected into June's brain in order to show the different levels of activity in specific areas of her brain.
C) Several images will be presented to June, which she will have to reconstruct with a pencil and paper.
D) A magnetic field will realign the hydrogen atoms in June's brain, allowing the computer to read the signals and construct images of her brain.