Principles of MRI

Principles of MRI - Siemens Magnetom Trio MRI Properties of...

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Siemens Magnetom Trio MRI
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Properties of Atomic Nuclei Nuclei have two properties: Spin (conceptual, not literal) Charge (property of protons) Nuclei are made of protons and neutrons Both have spin values of ½ Protons have charge Pairs of spins tend to cancel, so only atoms with an odd number of protons or neutrons have spin A nucleus has the  NMR Property  if it has both angular momentum and a magnetic  moment. Such nuclei have an odd number of protons or an odd number of neutrons. 
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Protons in No Magnetic Field In the absence of a strong  magnetic field, the spins are  oriented randomly. Thus, there is no                  net  magnetization  (M). 
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Transverse Magnetization B o B o Longitudinal Axis  ( z  direction) Transverse Plane    ( xy  plane) B is used for magnetic fields. B0 is the scanner’s main field.
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results in a net magnetization  (M) and gives rise to the Larmor Equation. Protons in Large
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This note was uploaded on 02/24/2011 for the course PYSC 507 taught by Professor Richards during the Fall '10 term at South Carolina.

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Principles of MRI - Siemens Magnetom Trio MRI Properties of...

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