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Fig 6. Patient 154. Increased volume of injury in vascular boundary zones from 2 to 4 days.
A and B, Axial Dav maps at 49 hours show reduced diffusivity (Dav reduced by about 20%, black arrows) in the frontal and parietooccipital intervascular boundary zones. Note also some reduced diffusivity in the posterolateral thalami (white arrows).
C, Proton MR spectroscopy from the left frontal white matter at 49 hours shows mild lactate (Lac) elevation.
D and E, Axial Dav maps at 91 hours show more extensive reduced diffusivity in the frontal and parieto-occipital intervascular boundary zones and new reduced diffusivity along the optic radiations (black arrows). Dav values were not significantly changed from the prior study at 49 hours.
F, Although the proton MR spectrum does not look significantly changed, measurements showed a 16% decrease in Lac/NAA and a 36% decrease in Lac/Ch in the frontal white matter compared with the study at 49 hours.
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