| 
Positron Emission Tomography
 These
are PET glucose metabolic images (shown on the right) compared
with X-ray computed tomography (shown on the left) of a patient
with aphasia. The studies were performed at two months
and four years following left hemisphere cerebral hemorrhage.
Note that for both time frames, the extent of cerebral hypometabolism
(less black is much greater than the actual lesion or residual
cavity (at late time). These studies demonstrate that
the functional abnormality demonstrated with PET typically
exceeds that seen with structural imaging techniques such
as X-ray, CT, or MRI and is more representative depiction
of the underlying functional state of the brain and the resultant
abnormal behaviors it produces. [Metter EJ, et al. Arch Neurol.
1980;47:1235-38.]
|
Stroke Education
