Background-Suppressed MR Venography of the Brain Using Magnitude Data: A High-Pass Filtering Approach
Figure 4
This figure shows the comparison of the magnitude data, SWI data, and BS-MRV data acquired with a 4-echo acquisition technique at Echo 2 ( ms, left column), Echo 3 ( ms, middle column), and Echo 4 ( ms, right column). This figure also shows the comparison of the original 3D magnitude (top row), the conventional SWI (middle row), and the BS-MRV (bottom row) using the same datasets. The off-resonance artifact in the frontal region with severe field inhomogeneity in SWI, as indicated by an arrow, was absent in BS-MRV. The regions with high level of iron deposits, such as the globus pallidus regions indicated by the dashed circles, did not obscure the visibility of veins in the BS-MRV.
