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Magnetic susceptibility
•
Off-resonance effects: distortion and signal variations (voids & hyperintensity)
•
Ferromagnetic material (
χ
>>0) has severe effect
Hz
Diamagnetic
χ
<0
Local field
variation
∆
B
0
superimposes
linear gradient
Paramagnetic
χ
>0
∆
B
0
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