MRI Scanner — Questions and answers

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Who discovered Nuclear Magnetic Resonance (NMR) and in what decade?

Choices

  1. Dr. Evelyn Reed in the 1940s.
  2. Isidor Rabi in the 1930s. ✓
  3. Paul Lauterbur in the 1970s.
  4. Peter Mansfield in the 1980s.

Answer: Isidor Rabi in the 1930s.

From page 3

What important discovery did Raymond Damadian make in 1971?

Choices

  1. He found that all tissues are exactly the same.
  2. He realized that cancerous tissues relaxed differently than healthy tissues in NMR. ✓
  3. He invented a new type of X-ray machine.
  4. He proved that magnets were not useful for medicine.

Answer: He realized that cancerous tissues relaxed differently than healthy tissues in NMR.

From page 4

What revolutionary idea did Paul Lauterbur have to help create images from NMR?

Choices

  1. To make the main magnetic field much weaker.
  2. To use only radio waves without any magnets.
  3. To add 'gradient magnetic fields' that made the magnetic strength change across the body. ✓
  4. To just look at the outside of the body instead of the inside.

Answer: To add 'gradient magnetic fields' that made the magnetic strength change across the body.

From page 5

What did Peter Mansfield invent to make MRI images much faster to get?

Choices

  1. A way to make the magnets bigger.
  2. Mathematical algorithms to get image data in fractions of a second. ✓
  3. A new kind of camera lens.
  4. He found a way to make the patient sleep for hours during the scan.

Answer: Mathematical algorithms to get image data in fractions of a second.

From page 6

What is the very first step when a person goes into an MRI scanner?

Choices

  1. A radiofrequency (RF) pulse is sent out.
  2. The patient's hydrogen protons line up in a big magnetic field. ✓
  3. Receiver coils start detecting signals.
  4. A powerful computer begins to process data.

Answer: The patient's hydrogen protons line up in a big magnetic field.

From page 7

When did the first MRI scanners start to be used in hospitals?

Choices

  1. In the 1970s.
  2. By the early 1980s. ✓
  3. Last year.
  4. Before X-rays were invented.

Answer: By the early 1980s.

From page 8