Background-Suppressed MR Venography of the Brain Using Magnitude Data: A High-Pass Filtering Approach

Figure 3

This figure shows the 512×384×50 (interpolated to 1024×768×100) dataset, the single slice (top row), and mIP (bottom row) of the magnitude images (a and e), MRV obtained by applying the conventional SWI postprocessing algorithm (homodyne filter size 64×48) (b and f), conventional SWI with a median filter (5×5×5) (c and g), and BS-MRV technique with iH filtering (2𝐻_𝑥×2𝐻_𝑦=32×24) (d and h). Severe off-resonance artifact (as indicated by bright arrows) and signal loss at the peripheral regions of the brain are observed in (b) and (f). Slight off-resonance artifacts (as indicated by arrows) were also observed in (c) and (g).

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