Magnetic Resonance Imaging

1
Magnetic Resonance Imaging

• Sarah Ezzell
• Engr. 302

2
History

• NMR - 1930s
• Dr. Damadian
• Tumor Detection by Nuclear Magnetic Resonance -
  1971
• Apparatus and Method for Detecting Cancer in
  Tissue - 1974
• Indomitable - 1977

3
Basics

• Magnetic field accompanied by radio-wave pulses
• What type of tissue are you?

4
Magnetic Field

• One of three magnet types
• Permanent magnet
• Resistive magnet
• Superconducting magnet
• Gradient magnets

5
Creating an Image

• Hydrogen protons align with magnetic field
• RF pulse applied and terminated
• Excess energy released
• Picked up and sent to computer system

6
Advantages / Disadvantages

• Diagnosis / Evaluation
• Imaging planes
• Biological effects

• External objects
• Internal objects
• Claustrophobic
• Cost

7
Future

• Medical industry
• More compact, patient-friendly, less expensive
• Factory floor
• Fluid content analysis
• Measure of material hardness
• NMR Mouse
• Carpet manufacturing