FIG 1.

Comparison of 7T SWI and 3T MR imaging. Displacement of the corticomedullary junction, seen as a hypointense band (triangles), and elongation of medullary veins running perpendicular to the cortical surface (brackets) can be observed on 7T SWI (spatial resolution, 0.156 × 0.156 × 3 mm; total scan time, 3 minutes and 48 seconds; number of slices, 5) (A), which cannot be appreciated on 3T SWI (0.653 × 0.653 × 2 mm; 4 minutes and 12 seconds; 64 slices) (B), 3T T1-weighted images (C), or 3T FLAIR images (D) obtained on a 3T clinical scanner. Apparent cortical thickening was observed in this diffuse astrocytoma, giving the impression of an oligodendroglioma. However, on close inspection, tapering of the cortex is observed at the edges of the lesion (A, arrows).