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Related Experiment Videos

Evidence-based neuroimaging in acute ischemic stroke.

Katie D Vo1, Weili Lin, Jin-Moo Lee

  • 1Neuroradiology Section, Mallinckrodt Institute of Radiology, Washington University School of Medicine, 510 South Kingshighway Boulevard, Campus Box 8131, Saint Louis, MO 63110, USA. vok@mir.wustl.edu

Neuroimaging Clinics of North America
|September 19, 2003
PubMed
Summary

Noncontrast CT is the initial imaging choice for acute neurologic deficits to rule out hemorrhage. While advanced MR imaging offers potential, its routine use before tissue plasminogen activator (t-PA) therapy is not yet supported due to a lack of outcome data.

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Area of Science:

  • Neurology
  • Radiology
  • Emergency Medicine

Background:

  • Acute neurologic deficits require prompt imaging to guide treatment decisions.
  • The National Institute of Neurological Disorders and Stroke (NINDS) t-PA trial established imaging priorities for acute stroke management.
  • Distinguishing hemorrhage from ischemic stroke is critical for selecting appropriate therapies.

Purpose of the Study:

  • To evaluate the role of imaging modalities in the work-up of acute neurologic deficits.
  • To assess the suitability of CT and MR imaging for patient selection in thrombolytic therapy.
  • To determine the current evidence supporting the use of advanced MR techniques in acute stroke.

Main Methods:

  • Review of current imaging protocols for acute neurologic deficits.

Related Experiment Videos

  • Comparison of computed tomography (CT) and magnetic resonance (MR) imaging capabilities.
  • Analysis of the NINDS t-PA trial recommendations and subsequent research.

    • Main Results:

    • Noncontrast CT is the recommended initial imaging modality for excluding intracerebral hemorrhage.
    • CT offers advantages in speed and hemorrhage detection despite limitations in identifying early ischemic lesions.
    • Advanced MR techniques show promise for comprehensive assessment but lack clinical outcome validation for routine use.

    Conclusions:

    • Noncontrast CT remains the standard for initial assessment in acute neurologic deficits.
    • Routine screening MR imaging prior to tissue plasminogen activator (t-PA) therapy is not supported by current evidence.
    • Further validation and correlation with clinical outcomes are necessary for advanced MR techniques in acute stroke management.