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Cerebral ischemia: evaluation with contrast-enhanced MR imaging
M R Crain1, W T Yuh, G M Greene
1Department of Radiology, University of Iowa College of Medicine, Iowa City 52242.
AJNR. American Journal of Neuroradiology
|July 1, 1991
Summary
Contrast-enhanced MRI reveals two distinct patterns of parenchymal enhancement in ischemic stroke, offering insights into lesion severity and clinical outcomes. Arterial enhancement is a key indicator of stroke severity.
Area of Science:
- Neurology
- Radiology
- Medical Imaging
Background:
- Ischemic stroke diagnosis and outcome prediction rely on imaging biomarkers.
- Understanding contrast enhancement patterns in MRI can provide crucial prognostic information.
Purpose of the Study:
- To investigate the relationship between arterial and parenchymal enhancement patterns on contrast-enhanced MRI and clinical severity in ischemic stroke.
- To differentiate between progressive and early/intense parenchymal enhancement patterns and their associated outcomes.
Main Methods:
- Retrospective review of contrast-enhanced MRI scans from 80 patients with 82 ischemic lesions.
- Analysis of arterial and parenchymal enhancement patterns in relation to time of symptom onset and clinical severity.
Main Results:
- Arterial enhancement was detected in 45% of initial MRIs, particularly in cortical infarction (86%), and correlated with clinical severity.
- Two parenchymal enhancement patterns were identified: progressive and early/intense.
- Early/intense enhancement correlated with milder outcomes, while progressive enhancement suggested a more severe ischemic insult.
Conclusions:
- Contrast-enhanced MRI reveals distinct enhancement patterns that aid in predicting ischemic stroke severity and clinical outcomes.
- Arterial enhancement is a valuable early indicator of stroke severity.
- Parenchymal enhancement patterns, specifically early/intense versus progressive, offer differential prognostic information.