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American Journal of Neuroradiology, Vol 13, Issue 3 959-972, Copyright © 1992 by American Society of Neuroradiology

ARTICLES

MR and CT evaluation of profound neonatal and infantile asphyxia

AJ Barkovich
Department of Radiology, University of California, San Francisco 94143- 0625.

PURPOSE: To determine the CT and MR characteristics of the brains of infants who have suffered profound asphyxia and correlate those characteristics with pathophysiologic processes. METHODS: MR and CT scans of 16 patients who suffered profound hypoxic-ischemic injury in the perinatal (12 patients) and postnatal (4 patients) periods were retrospectively reviewed in a search for characteristic imaging features. RESULTS: Injury in the perinatal period: subacute MR showed short T1 and T2 in the ventral lateral thalami, posterolateral lentiform nuclei, posterior mesencephali, and hippocampi; MR 1 to 16 years after injury showed atrophy or T2 prolongation in the aforementioned regions, the lateral geniculate nuclei and perirolandic cerebral cortex. Asphyxia later in infancy: subacute MR showed T2 prolongation in the corpus striatum and most of the cerebral cortex (perirolandic sparing); MR weeks to months later showed atrophy of the aforementioned areas, the lateral geniculate nuclei and hippocampi. Acute CT in both groups showed basal ganglia hypodensity. CONCLUSIONS: The injury patterns observed in neonates and infants with profound hypoxic-ischemic injury vary with the age of the patient at the time of the injury. The change in pattern of damage is suggested to be the result of structural and physiologic changes in the maturing brain. The patterns appear to be consistent and are well demonstrated by MR.


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Copyright © 2008 by the American Society of Neuroradiology. Print ISSN: 0195-6108 Online ISSN: 1936-959X