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Fetal cerebral cortex: normal gestational landmarks identified using prenatal MR imaging.

C Garel1, E Chantrel, H Brisse

  • 1Department of Pediatric Radiology and Developmental Imaging Research Laboratory (JE 2149) URF Lariboisière-Saint-Louis, Université Paris VII, France.

AJNR. American Journal of Neuroradiology
|February 13, 2001
PubMed
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This study establishes normal fetal brain sulcation landmarks using in utero MR imaging. Findings provide a reference for assessing fetal brain development and diagnosing gyrational abnormalities.

Area of Science:

  • Neuroimaging
  • Fetal Development
  • Neuroanatomy

Background:

  • Limited research exists on fetal gyration patterns via MR imaging.
  • Understanding normal fetal brain development is crucial for diagnosing abnormalities.

Purpose of the Study:

  • To establish normal sulcation landmarks in fetuses using in utero MR imaging.
  • To correlate these findings with established neuroanatomic timetables.
  • To create a reference for assessing fetal brain maturation.

Main Methods:

  • Standardized fetal cerebral MR examinations were performed on 173 normal fetuses (22-38 weeks gestation).
  • Eight T1- and T2-weighted MR slices (coronal, axial, sagittal) were obtained and analyzed.
  • Sequential development of cerebral cortical fissures and sulci were tabulated against gestational age.

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Main Results:

  • A timetable for MR depiction of primary and secondary sulci was established for 22-38 weeks gestation.
  • Sulcation patterns of medial, lateral, and inferior brain surfaces were detailed.
  • The established timetable showed good agreement with neuroanatomic standards, with a mean lag of 1 week.

Conclusions:

  • This large-scale analysis enhances understanding of fetal cortex maturation on MR imaging.
  • Provides a valuable reference standard for evaluating fetal sulcation normality.
  • Aids in diagnosing gyrational abnormalities using prenatal MR imaging.