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Updated: Apr 4, 2026

A Magnetic Resonance Imaging Protocol for Stroke Onset Time Estimation in Permanent Cerebral Ischemia
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A Magnetic Resonance Imaging Protocol for Stroke Onset Time Estimation in Permanent Cerebral Ischemia

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[Diffusion-weighted imaging in acute stroke]

U Yilmaz1

  • 1Klinik für Diagnostische und Interventionelle Neuroradiologie, Universitätsklinikum des Saarlandes, Kirrberger Straße 1, 66421, Homburg-Saar, Deutschland. umut.yilmaz@uks.eu.

Der Radiologe
|September 3, 2015
PubMed

Insights

Diffusion-weighted imaging (DWI) detects acute ischemic stroke early. Multiparametric MRI, including DWI, aids therapy decisions when symptom onset time is unknown.

Area of Science:

  • Neuroimaging
  • Radiology
  • Medical Diagnostics

Context:

  • Acute ischemic stroke diagnosis
  • Early detection of neurological deficits
  • Water diffusion principles in the brain

Purpose:

  • To highlight the role of Diffusion-weighted imaging (DWI) in acute ischemic stroke detection.
  • To explain the underlying mechanism of DWI signal changes in cytotoxic edema.
  • To emphasize the utility of multiparametric MRI, including DWI, in guiding therapy decisions when symptom onset is uncertain.

Summary:

  • Diffusion-weighted imaging (DWI) offers high sensitivity and specificity for the early detection of acute ischemic stroke.
  • Signal alterations in DWI are attributed to reduced water molecule diffusion caused by cytotoxic edema.
  • While not always essential for immediate treatment decisions, multiparametric MRI incorporating DWI provides crucial information in cases with unknown symptom onset times, influencing therapeutic strategies.

Impact:

  • Facilitates timely intervention for acute ischemic stroke.
  • Improves diagnostic accuracy in neuroimaging.
  • Enhances clinical decision-making for stroke management, particularly in complex cases.
Keywords:
Diffusion weighted imagingIschemiaMagnetic resonance imagingStrokeTherapy decision

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