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Visualization of a small hemorrhagic lesion. (A) 3D T2*WI shows a small cortical hemorrhage as a low signal intensity spot (arrow). (B) QSM shows a more localized spot (arrow) with high susceptibility by localizing the susceptibility field dipole. 3D, 3-dimensional; QSM, quantitative susceptibility mapping; T2*WI, T2*-weighted imaging.
