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Updated: Jul 19, 2026

The Hypoxic Ischemic Encephalopathy Model of Perinatal Ischemia

The Hypoxic Ischemic Encephalopathy Model of Perinatal Ischemia

Published on: November 19, 2008

Neonatal hypoxic-ischemic encephalopathy: multimodality imaging findings.

Christine P Chao¹, Christopher G Zaleski, Alice C Patton

¹Department of Radiology, Mayo Clinic, 4500 San Pablo Rd, Jacksonville, FL 32224, USA.

Radiographics : a Review Publication of the Radiological Society of North America, Inc

|October 20, 2006

Summary

Neonatal hypoxic-ischemic encephalopathy (HIE) presents distinct brain injury patterns based on insult severity and brain maturity. Advanced imaging like MRI is crucial for identifying these patterns and guiding prognosis.

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The Hypoxic Ischemic Encephalopathy Model of Perinatal Ischemia

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Published on: November 19, 2008

Simultaneous PET/MRI Imaging During Mouse Cerebral Hypoxia-ischemia

Simultaneous PET/MRI Imaging During Mouse Cerebral Hypoxia-ischemia

Published on: September 20, 2015

Area of Science:

Neonatology
Neurology
Pediatric Imaging

Background:

Hypoxic-ischemic brain injury is a significant cause of neonatal encephalopathy (HIE).
Injury patterns vary due to brain maturity, hypotension severity, and insult duration.
Imaging is essential for diagnosis and understanding HIE's diverse manifestations.

Purpose of the Study:

To delineate the four distinct patterns of neonatal brain injury in HIE.
To correlate imaging findings with specific etiological factors (hypotension, maturity).
To highlight the role of advanced neuroimaging in HIE evaluation.

Main Methods:

Review of cranial ultrasonography and computed tomography findings.
Emphasis on Magnetic Resonance Imaging (MRI) as the most sensitive diagnostic modality.
Correlation of imaging patterns with clinical scenarios in preterm and term neonates.

Main Results:

Cranial US/CT identify periventricular leukomalacia, germinal matrix hemorrhage, and hydrocephalus.
MRI reveals distinct injury patterns in preterm neonates (periventricular vs. deep gray matter/brainstem/cerebellum infarction).
MRI shows characteristic patterns in term neonates (parasagittal cortical/subcortical vs. thalamic/putaminal/hippocampal/corticospinal tract injury).

Conclusions:

Recognizing specific imaging findings aids in excluding other encephalopathy causes.
Imaging patterns are critical for determining HIE prognosis.
Early identification of HIE brain injury patterns facilitates timely, supportive treatment.