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← ScienceWhich outcome occurs when applying strong magnetic field gradients during diffusion-weighted MRI?
A)Signal loss due to phase dispersion✓
B)Increased transverse relaxation time
C)Uniform rephasing of nuclear spins
D)Enhanced T1-weighted image contrast
💡 Explanation
Signal loss occurs because dephasing of water molecule proton spins happens causing destructive interference within the voxel. This dephasing arises because of differing magnetic field gradients which causes phase dispersion, therefore signal is attenuated rather than enhanced or rephased.
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