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Research ArticleBRAIN

Arterial Hyperintensity on Fast Fluid-attenuated Inversion Recovery Images: A Subtle Finding for Hyperacute Stroke Undetected by Diffusion-weighted MR Imaging

Masayuki Maeda, Tatsuya Yamamoto, Shouichiro Daimon, Hajime Sakuma and Kan Takeda
American Journal of Neuroradiology April 2001, 22 (4) 632-636;
Masayuki Maeda
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Tatsuya Yamamoto
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Shouichiro Daimon
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Hajime Sakuma
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Kan Takeda
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    fig 1.

    Case 10. MR images of 75-year-old man, with right hemiparesis, scanned 3 hours (A–C) and 3 days (D) after symptom onset.

    A, Diffusion-weighted (4999/126/1, b = 1000) MR image shows high signal intensity in the left MCA territory (arrows), suggesting the infarction pertinent to this episode.

    B, Fast-FLAIR (8000/110/1, TI = 1800) image shows arterial hyperintensity in the left sylvian fissure (arrow). Note that there is chronic infarction that occurred 7 weeks before this stroke (arrowhead).

    C, Contrast-enhanced T1-weighted (500/12/2) image shows arterial enhancement more extensively than does the arterial hyperintensity exhibited in B (arrows).

    D, Fast-FLAIR (8000/110/1, TI = 1800) image shows a hyperintense area of acute infarction at 3 days after onset (arrowhead). Note that the arterial hyperintensity seen at 3 hours disappears at this time.

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    fig 2.

    Case 11. MR images of a 65-year-old man, with right-arm weakness, scanned 3 hours (A–C) and 3 days (D and E) after symptom onset.

    A and B, Diffusion-weighted MR images (4999/126/1, b = 1000) are negative for stroke 3 hours after onset.

    C, Fast-FLAIR (8000/110/1, TI = 1800) image shows arterial hyperintensity in the left MCA territory (arrow). This is the only abnormal finding pertinent to the patient's symptoms at the initial MR examination.

    D and E, Fast-FLAIR (8000/110/1, TI = 1800) images show extensive acute infarction in the left MCA territory 3 days after onset (arrows).

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    Clinical data and MR findings of patients with stroke

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American Journal of Neuroradiology
Vol. 22, Issue 4
1 Apr 2001
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Cite this article
Masayuki Maeda, Tatsuya Yamamoto, Shouichiro Daimon, Hajime Sakuma, Kan Takeda
Arterial Hyperintensity on Fast Fluid-attenuated Inversion Recovery Images: A Subtle Finding for Hyperacute Stroke Undetected by Diffusion-weighted MR Imaging
American Journal of Neuroradiology Apr 2001, 22 (4) 632-636;

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Arterial Hyperintensity on Fast Fluid-attenuated Inversion Recovery Images: A Subtle Finding for Hyperacute Stroke Undetected by Diffusion-weighted MR Imaging
Masayuki Maeda, Tatsuya Yamamoto, Shouichiro Daimon, Hajime Sakuma, Kan Takeda
American Journal of Neuroradiology Apr 2001, 22 (4) 632-636;
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Cited By...

  • Hyperintense Basilar Artery on FLAIR MR Imaging: Diagnostic Accuracy and Clinical Impact in Patients with Acute Brain Stem Stroke
  • Fluid-Attenuated Inversion Recovery Vascular Hyperintensities: An Important Imaging Marker for Cerebrovascular Disease
  • Decrease in Leptomeningeal Ivy Sign on Fluid-Attenuated Inversion Recovery Images after Cerebral Revascularization in Patients with Moyamoya Disease
  • Angiography Reveals That Fluid-Attenuated Inversion Recovery Vascular Hyperintensities Are Due to Slow Flow, Not Thrombus
  • Exclusion of brain lesions: is MR contrast medium required after a negative fluid-attenuated inversion recovery sequence?
  • Evaluation of Hyperintense Vessels on FLAIR MRI for the Diagnosis of Multiple Intracerebral Arterial Stenoses
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