Fig 1.

A, Axial view of IR-FSPGR image. B, Axial view of 3D-TSI-CSF image. C, Axial view of T1-weighted image acquired at the time of the 3T MR imaging. D, Axial view of T1-weighted image acquired 24 months before images reported in A–C. A–D shows a group-A lesion (arrowheads). Only one of the lesions identified on MR imaging is discussed as an example. It can be seen that the BH in A corresponds to a hyperintense area on the relative TSI volume (B). The BH marked here is defined as CBH because it was present 24 months before the 3T study (D).