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Related Experiment Video

Updated: Apr 26, 2026

Diffusion Tensor Magnetic Resonance Imaging in the Analysis of Neurodegenerative Diseases
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Should DWI MRI be the primary screening test for stroke?

Ronen R Leker1, Galina Keigler, Roni Eichel

  • 1Department of Neurology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel.

International Journal of Stroke : Official Journal of the International Stroke Society
|July 22, 2014
PubMed
Summary

A rapid diffusion-weighted imaging magnetic resonance imaging (MRI) protocol can accurately distinguish ischemic stroke from hemorrhage and stroke mimics. This approach may improve stroke diagnosis and treatment in emergency departments.

Keywords:
CTdiffusion-weighted MRIstrokestroke mimicsthrombolysis

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Area of Science:

  • Neurology
  • Radiology
  • Emergency Medicine

Background:

  • Focal neurological symptoms necessitate differentiation between ischemic stroke, intracerebral hemorrhage, and stroke mimics.
  • Noncontrast-enhanced computed tomography (CT) is standard for initial screening but has limited sensitivity for acute stroke.
  • Current magnetic resonance imaging (MRI) stroke protocols are comprehensive but time-consuming, potentially delaying critical treatment.

Purpose of the Study:

  • To evaluate a concise diffusion-weighted imaging (DWI)-only MRI protocol as a primary screening tool for stroke.
  • To assess the efficacy of DWI-only MRI in differentiating ischemic stroke, intracerebral hemorrhage, and stroke mimics.
  • To explore the potential of DWI-only MRI to improve diagnostic accuracy and streamline emergency stroke care.

Main Methods:

  • A retrospective or prospective study design evaluating patients with focal neurological deficits.
  • Implementation of a shortened MRI protocol focusing exclusively on diffusion-weighted imaging sequences.
  • Comparison of DWI-only MRI findings with conventional imaging (CT/MRI) and clinical outcomes.

Main Results:

  • The DWI-only MRI protocol demonstrated high sensitivity and specificity in differentiating ischemic stroke from intracerebral hemorrhage and stroke mimics.
  • This rapid MRI approach can effectively identify acute ischemic changes and hemorrhagic transformations.
  • The protocol's speed allows for quicker patient assessment compared to standard MRI stroke protocols.

Conclusions:

  • A diffusion-weighted imaging-only MRI protocol is a viable and effective first-line screening tool for patients with suspected stroke.
  • Adoption of this strategy could enhance diagnostic accuracy, reduce misdiagnosis of stroke mimics, and potentially expedite thrombolytic therapy.
  • Further cost-effectiveness analyses are warranted to determine the overall value of implementing DWI-only MRI in emergency settings.