Effective Performance of T1-weighted FLAIR Imaging with BLADE in Pediatric Brains

DOI Web Site PubMed 参考文献17件
  • TACHIBANA Yasuhiko
    Department of Radiology, Kanagawa Children's Medical Center
  • NIWA Tetsu
    Department of Radiology, Kanagawa Children's Medical Center
  • KWEE Thomas C.
    Department of Radiology, University Medical Center Utrecht, The Netherlands
  • TAKAHARA Taro
    Department of Radiology, University Medical Center Utrecht, The Netherlands Department of Biomedical Engineering, Tokai University School of Engineering
  • KUSAGIRI Kouki
    Department of Radiology, Kanagawa Children's Medical Center
  • NAGAOKA Tomoaki
    EMC Group, National Institute of Information and Communications Technology
  • WATANABE Reiko
    Department of Radiology, Kanagawa Children's Medical Center
  • AIDA Noriko
    Department of Radiology, Kanagawa Children's Medical Center

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  • Effective Performance of T<sub>1</sub>-weighted FLAIR Imaging with BLADE in Pediatric Brains

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Purpose: In magnetic resonance imaging of the brain, BLADE is used to compensate for head motion. The technique focuses mainly on acquisition of T2-weighted or contrast-enhanced T1-weighted images in adults; its utility for nonenhanced T1-weighted imaging in children is not well established. We compared the quality of T1-weighted fluid-attenuated inversion recovery brain imaging with BLADE (T1-FLAIR-BLADE) to that of conventional spin-echo T1-weighted imaging (T1-SE) in pediatric patients who cannot stay still during MR imaging.<br> Materials and Methods: Our investigation included a volunteer study and a retrospective clinical study. Six healthy adult volunteers underwent scanning to compare the contrast of T1-SE, T1-weighted fluid-attenuated inversion recovery imaging (T1-FLAIR), and T1-FLAIR-BLADE at both 1.5 and 3 tesla. Comparison was based on scores assigned independently by 2 blinded observers and by calculated contrast-to-noise ratio. The clinical study included 20 children who underwent both T1-SE and T1-FLAIR-BLADE at either 1.5 (n=9) or 3 T (n=11). On each sequence, 2 blinded observers independently scored visualization of the cerebral gyri and contrast between gray and white matter. We compared scores between sequences separately for 1.5 and 3T using Wilcoxon signed-rank tests.<br> Results: At both 1.5 and 3T, contrast was better using T1-FLAIR and T1-FLAIR-BLADE than T1-SE in volunteers, and overall scores were significantly higher with T1-FLAIR-BLADE (P<0.05) than T1-SE in the clinical study.<br> Conclusion: T1-FLAIR-BLADE may be superior to T1-SE in demonstrating brain structures in children who cannot stay still and may be used to supplement or replace T1-SE when T1-SE is insufficient for patient motion.<br>

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