Related Experiment Videos
[Principles and clinical applications of diffusion weighted echo planar MR imaging]
Nihon Rinsho. Japanese Journal of Clinical Medicine
|July 1, 1997
Summary
Diffusion-weighted MRI (DWI) using echo planar imaging (EPI) effectively detects acute and chronic strokes. This technique distinguishes between hemorrhagic and non-hemorrhagic strokes in clinical practice.
Area of Science:
- Neuroimaging
- Medical Physics
- Radiology
Context:
- Diffusion-weighted MRI (DWI) with echo planar imaging (EPI) enables practical measurements without head fixation.
- Traditional methods were limited by patient immobility.
- Hyperacute stroke detection has been a challenge.
Purpose:
- To review the utility of DWI-EPI in differentiating acute from chronic stroke.
- To assess the capability of DWI-EPI in distinguishing hemorrhagic from non-hemorrhagic strokes.
- To highlight DWI-EPI as a promising technique for routine clinical use in stroke patients.
Summary:
- DW hyperintensity and reduced apparent diffusion coefficient (ADC) characterize hyperacute strokes within 2.5 hours.
- ADC decreases and DW hyperintensity are observed within 10 and 30 days, respectively.
- In chronic stages, increased ADC without DW hyperintensity differentiates from acute stroke.
- DWI-EPI and T2-weighted EPI can distinguish acute hemorrhagic from non-hemorrhagic strokes.
Impact:
- DWI-EPI offers a non-invasive method for early stroke detection and characterization.
- The technique improves diagnostic accuracy for stroke subtypes.
- Facilitates timely clinical decisions and patient management in stroke care.