Dynamic motion analysis of fetuses with central nervous system disorders by cine magnetic resonance imaging using fast imaging employing steady-state acquisition and parallel imaging: A preliminary result

Wan Yuo Guo, Shigeki Ono, Shizuo Oi, Shu Huei Shen, Tai-Tong Wong, Hsiao Wen Chung, Jeng Hsiu Hung

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Object. The authors present a novel cine magnetic resonance (MR) imaging, two-dimensional (2D) fast imaging employing steady-state acquisition (FIESTA) technique with parallel imaging. It achieves temporal resolution at less than half a second as well as high spatial resolution cine imaging free of motion artifacts for evaluating the dynamic motion of fetuses in utero. The information obtained is used to predict postnatal outcome. Methods. Twenty-five fetuses with anomalies were studied. Ultrasonography demonstrated severe abnormalities in five of the fetuses; the other 20 fetuses constituted a control group. The cine fetal MR imaging demonstrated fetal head, neck, trunk, extremity, and finger as well as swallowing motions. Imaging findings were evaluated and compared in fetuses with major central nervous system (CNS) anomalies in five cases and minor CNS, non-CNS, or no anomalies in 20 cases. Normal motility was observed in the latter group. For fetuses in the former group, those with abnormal motility failed to survive after delivery, whereas those with normal motility survived with functioning preserved. The power deposition of radiofrequency, presented as specific absorption rate (SAR), was calculated. The SAR of FIESTA was approximately 13 times lower than that of conventional MR imaging of fetuses obtained using single-shot fast spin echo sequences. Conclusions. The following conclusions are drawn: 1) Fetal motion is no longer a limitation for prenatal imaging after the implementation of parallel imaging with 2D FIESTA, 2) Cine MR imaging illustrates fetal motion in utero with high clinical reliability, 3) For cases involving major CNS anomalies, cine MR imaging provides information on extremity motility in fetuses and serves as a prognostic indicator of postnatal outcome, and 4) The cine MR used to observe fetal activity is technically 2D and conceptually three-dimensional. It provides four-dimensional information for making proper and timely obstetrical and/or postnatal management decisions.

Original languageEnglish
Pages (from-to)94-100
Number of pages7
JournalJournal of Neurosurgery
Volume105 PEDIATRICS
Issue numberSUPPL. 2
Publication statusPublished - Aug 1 2006
Externally publishedYes

Keywords

  • Central nervous system anomaly
  • Cine imaging
  • Fetal imaging
  • Magnetic resonance imaging
  • Parallel imaging
  • Pediatric neurosurgery

ASJC Scopus subject areas

  • Clinical Neurology
  • Neuroscience(all)

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