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The Ultimate MRI Quiz
by Staff
An MRI machine is more than just a big, claustrophobia-inducing tube. How much do you know about what's going on inside -- or what's going on inside your body while you're in there?

The biggest and most important component of an MRI system is the:

  • bore
  • magnet
  • imager

The first MRI examination was performed on a human being in:

  • 1967
  • 1977
  • 1985

For the purpose of an MRI, which element within the body is most important?

  • oxygen
  • carbon
  • hydrogen

An MRI system uses an RF pulse to change the:

  • spin of atoms' nuclei
  • shape of the nuclei
  • amount of metal in a person's cells

The most common type of magnet used in MRI systems is the:

  • resistive magnet
  • permanent magnet
  • superconducting magnet

In a superconducting magnet, the coils are bathed in liquid helium:

  • to keep the system from overheating
  • to reduce the amount of resistance in the wire
  • to keep the area around the coils sterile

An MRI system creates an image when:

  • All the hydrogen atoms in your body line up, creating an outline.
  • Hydrogen atoms facing opposite directions cancel each other out, creating a reverse outline.
  • The hydrogen atoms go back to their normal position, releasing energy.

What component of an MRI system allows it to choose exactly where in the body to acquire an image?

  • Gradient magnets
  • Bore
  • Contrast injector

What does an MRI system use to convert mathematical data into a picture?

  • RF pulse converter
  • Fourier transform
  • electron precession

MRI scans tend to be very noisy. The noise comes from:

  • opposition of the main magnetic field to the current in the gradient magnets' wires
  • movement of the magnet from place to place
  • stray particles within the system being thrown about by the magnetic field