2016_Imaging for Physicists
Magnetic susceptibility
Paramagnetic χ >0
Diamagnetic χ <0
∆ B 0
Local field variation ∆ B 0 superimposes linear gradient
Hz
• Off-resonance effects: distortion and signal variations (voids & hyperintensity) • Ferromagnetic material ( χ >>0) has severe effect
Made with FlippingBook