At the heart of a magnetic resonance imaging scanner is a large electromagnet capable of generating strong uniform magnetic fields of around one Tesla or more. a) Describe the effect of this large magnetic field on the protons of the hydrogen nuclei within the molecules that make up tissue. A pulse of radio waves is used to excite these protons to a higher energy state. b) Explain why a precise frequency of radiation is required and how this affects the motion of the proton spins.
At the heart of a magnetic resonance imaging scanner is a large electromagnet capable of generating strong uniform magnetic fields of around one Tesla or more. a) Describe the effect of this large magnetic field on the protons of the hydrogen nuclei within the molecules that make up tissue. A pulse of radio waves is used to excite these protons to a higher energy state. b) Explain why a precise frequency of radiation is required and how this affects the motion of the proton spins.
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At the heart of a magnetic resonance imaging scanner is a large
a) Describe the effect of this large magnetic field on the protons of the hydrogen
nuclei within the molecules that make up tissue.
A pulse of radio waves is used to excite these protons to a higher energy state.
b) Explain why a precise frequency of radiation is required and how this affects the
motion of the proton spins.
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