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Updated: May 6, 2026

A Magnetic Resonance Imaging Protocol for Stroke Onset Time Estimation in Permanent Cerebral Ischemia
Published on: September 16, 2017
Pediatric cerebral stroke: susceptibility-weighted imaging may predict post-ischemic malignant edema
Thangamadhan Bosemani1, Andrea Poretti, Gunes Orman
1Section of Pediatric Neuroradiology, Division of Pediatric Radiology, Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine; Baltimore, MD, USA - thuisma1@jhmi.edu.
Susceptibility-weighted imaging (SWI) helps assess blood oxygenation in stroke patients. This MRI technique identifies hyperperfusion, aiding in prognosis and predicting malignant edema risk.
Area of Science:
- Neuroimaging
- Magnetic Resonance Imaging (MRI)
- Vascular Neurology
Background:
- Susceptibility-weighted imaging (SWI) is an advanced MRI technique.
- SWI provides crucial information on blood oxygenation levels.
- Deoxyhemoglobin in hypoperfused tissue causes SWI-hypointensity.
Observation:
- SWI reveals hyperintensity in hyperperfused tissue due to high oxyhemoglobin.
- A pediatric stroke case demonstrated SWI's utility.
- SWI excluded hemorrhage and delineated the thrombus.
Findings:
- SWI identified regions of hyperperfusion or luxury perfusion.
- These perfusion states were linked to patient prognosis.
- SWI indicated an increased risk of post-ischemic malignant edema.
Implications:
- SWI is valuable for stroke assessment beyond hemorrhage detection.
- It aids in understanding perfusion dynamics in ischemic stroke.
- SWI can improve prognostic accuracy and guide clinical management.
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