FIG 1. Examples of recent ischemic lesions and T2 shine-through effect. For recent lesions, high signal intensity is seen on the diffusion-weighted images (left), and corresponding reductions of diffusivity are seen on the ADC maps (right, arrows).

A, A recent asymptomatic ischemic lesions is seen in the left centrum semiovale in a patient with ischemic leukoaraiosis.

B, A recent asymptomatic ischemic lesions is seen in the left cerebellar hemisphere in a patient with CADASIL.

C, Two areas of hyperintensity are seen on the diffusion-weighted images of a different patient (left) and are found to correspond with increased ADC values (right, arrows), indicating that these are chronic lesions.