MRI Systems Quiz

What type of magnet is most commonly used in clinical MRI systems?

• Permanent magnet

• Electromagnet

• Superconducting magnet

• Resistive magnet

Why are MRI magnets often kept at extremely low temperatures?

• To enhance image quality

• To prevent overheating

• To maintain superconductivity

• To reduce power consumption

Which substance is commonly used to cool MRI magnets?

• Liquid nitrogen

• Liquid helium

• Liquid oxygen

• Liquid hydrogen

What is the purpose of the magnetic field in MRI?

• To generate X-rays

• To align protons in the body

• To cool the MRI machine

• To produce sound waves

What is the magnetic field strength in the center of a typical 1.5T MRI scanner?

• 1.5 Tesla

• 3 Tesla

• 0.5 Tesla

• 2 Tesla

What phenomenon occurs when a strong magnetic field is turned off rapidly in an MRI system?

• Eddy currents

• Quenching

• Magnetic resonance

• Superconductivity

How does the strength of an MRI magnet affect the quality of the image?

• Stronger magnets produce clearer images.

• Weaker magnets produce clearer images.

• Magnet strength does not affect image quality.

• Stronger magnets distort the image.

Which of the following is a major advantage of using a superconducting magnet in MRI?

• It does not require electricity.

• It produces no magnetic field.

• It can create a very strong and stable magnetic field.

• It is portable.

What happens to a superconductor if it is warmed above its critical temperature?

• It becomes a permanent magnet.

• It loses its superconductivity.

• It increases its magnetic strength.

• It turns into a liquid.

Why is it essential to monitor the room temperature and humidity in an MRI suite?

• To maintain patient comfort

• To prevent overheating of the MRI magnet

• To ensure the magnet’s superconductivity

• To reduce image noise