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NMR signal and contrast

Learning objectives

After reading this chapter, you should be able:

  • To present the different types of main magnet, their advantages and drawbacks
  • Describe the role of liquid Helium and its safety implications (quench)
  • Characterize a magnetic field gradient and its criteria of quality
  • Describe the impact of Foucault currents on gradients
  • Explain the origin of MRI sound
  • Specify the components of the radiofrequency channel and the different types of antenna
  • List the materials at risk and the precautions prior to an MRI examination
  • Explain the origin of peripheral neurostimulations during an MRI examination
  • Present the factors affecting SAR and how to reduce it


Author(s)
Hoa D
Last modification
11 / 22 / 2007