Related Experiment Video
Updated: Aug 18, 2026
Simultaneous PET/MRI Imaging During Mouse Cerebral Hypoxia-ischemia
Published on: September 20, 2015
Delayed diffusion-weighted MR abnormality in a patient with an extensive acute cerebral hypoxic injury
J K Hald1, J A Brunberg, A B Dublin
1Department of Radiology, University of California, Davis, Medical Center, Sacramento 95817, USA. john.hald@ucdmc.ucdavis.edu
Abstract:
Diffusion-weighted (DW) MR imaging usually identifies acute cerebral infarction injury in symptomatic patients. We report a patient with severe hypoxic brain injury following suicide attempt by hanging, but with normal DW MR imaging 5-6 h after the event. Follow-up DW MR imaging 3 days after the event, and subsequent autopsy, revealed extensive cerebral anoxic injury.
Insights
Diffusion-weighted MRI typically detects acute stroke. However, this case shows normal diffusion-weighted imaging in severe hypoxic brain injury for up to 5-6 hours, highlighting a diagnostic challenge in anoxic brain injury.
Area of Science:
- Neurology
- Radiology
- Pathology
Background:
- Diffusion-weighted (DW) Magnetic Resonance (MR) imaging is a standard diagnostic tool for acute cerebral infarction in symptomatic individuals.
- Early detection of hypoxic-ischemic brain injury is crucial for timely intervention and management.
Observation:
- A patient with severe hypoxic brain injury following a suicide attempt by hanging presented with normal DW MR imaging findings 5-6 hours post-event.
- Initial imaging did not reveal the extent of the brain injury.
Findings:
- Follow-up DW MR imaging performed 3 days after the event demonstrated extensive cerebral anoxic injury.
- Autopsy findings corroborated the delayed detection of widespread anoxic brain damage.
Implications:
- This case highlights the limitations of early DW MR imaging in diagnosing severe hypoxic-ischemic brain injury.
- Delayed or serial imaging may be necessary for accurate assessment of anoxic brain damage.
- Consideration of clinical context alongside imaging findings is essential in cases of suspected hypoxic brain injury.
