A3
Large/strong (constant) magnetic field.
Nuclei rotate about the direction of field/precess
Radio frequency / r.f. pulse
Causes resonance in the nuclei, nuclei absorb energy
Pulse is at the Larmor frequency
On relaxation / nuclei de-excite to emit/ (pulse of) r.f.
Detected and processed
Non-uniform field (superimposed)
Allows for position of nuclei to be determined
And for location of direction to be changed
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