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Assessing Cortical Cerebral Microinfarcts on High Resolution MR Images
08:39

Assessing Cortical Cerebral Microinfarcts on High Resolution MR Images

Published on: November 20, 2015

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Signal Change of Acute Cortical and Juxtacortical Microinfarction on Follow-Up MRI

M Miyata1, S Kakeda2, T Yoneda3

  • 1From the Department of Radiology (M.M., S.K., S.I., K.W., J.M., Y.K.), School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Fukuoka, Japan.

AJNR. American Journal of Neuroradiology
|March 31, 2018
PubMed
Abstract

Insights

Susceptibility-weighted imaging (SWI) reveals that many acute cortical microinfarcts show changes over time, indicating potential hemorrhagic components. This finding enhances understanding of microinfarct evolution on MRI.

Area of Science:

  • Neurology
  • Radiology
  • Medical Imaging

Background:

  • Cortical microinfarcts are clinically significant but their evolution on MRI remains unclear.
  • Understanding microinfarct temporal changes is crucial for diagnosis and management.

Purpose of the Study:

  • To investigate the temporal evolution of acute cortical microinfarcts.
  • To compare susceptibility-weighted imaging (SWI) with conventional MRI sequences for detecting microinfarcts.

Main Methods:

  • Retrospective study of patients with acute cortical/juxtacortical microinfarcts (≤10 mm) on diffusion-weighted imaging (DWI).
  • Follow-up 3T MRI including T2WI, FLAIR, T2*WI, and SWI was analyzed by two neuroradiologists.
  • Lesion signal intensities and locations were assessed.

Main Results:

  • 180 microinfarcts were initially detected on DWI in 25 patients.
  • On follow-up, SWI identified the most cortical microinfarcts (54%), followed by T2WI (16%), FLAIR (5%), and T2* (2%).
  • All detected microinfarcts showed characteristic signal changes on follow-up sequences.

Conclusions:

  • SWI effectively reveals the evolution of acute cortical microinfarcts.
  • The observed changes suggest that a significant proportion of cortical microinfarcts may possess hemorrhagic components.
  • SWI is valuable for characterizing microinfarcts and understanding their paramagnetic susceptibility changes.

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