Fig 2. Co-registered SWI and PET images of a 6-year-old girl (patient 9) with Sturge-Weber syndrome affecting the left hemisphere. SWI shows gyriform cortical signal intensity abnormalities in the left posterior region in atrophic cortex with severe (>20% decrease) hypometabolism on PET. In front of this area, deep veins are seen in the white matter, connecting mildly hypometabolic (10%–20% decrease) cortex to deep, periventricular veins.