Image evaluation of free-breathing navigator echo and triggered cardiac-gated delayed myocardial enhancement magnetic resonance imaging in sedated infants

Ryutaro Matsuura, Sachiko Goto, Shuhei Sato, Noriaki Akagi, Seiji Tahara

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

We validated a navigator-echo-triggered sequence that drives magnetization before cardiac-gated inversion recovery T1 turbo field echo acquisition, in the sedated free-breathing pediatric population. Cardiac magnetic resonance imaging was performed on sedated infants with single ventricle. We calculated the signal-to-noise ratios and contrast-to-noise ratios of 2 groups of images obtained using respiratory triggering with and without navigator echo. All images were then visually assessed by 2 observers. The signal-to-noise ratio and the contrast- to-noise ratio were significantly higher with than without navigator echo (p < 0.01; p < 0.05). The visual assessment scores were also consistently better with than without navigator echo (p < 0.01). Free-breathing navigator echo was found to have the advantage of decreasing the motion artifact caused by respiration. Cardiacgated inversion recovery T1 turbo field echo sequence for free-breathing navigator-echo-triggered respiration allows for the acquisition, in sedated infants, of diagnostic images whose quality exceeds that of the non-navigator- echo-triggered alternative.

Original languageEnglish
Pages (from-to)267-273
Number of pages7
JournalActa medica Okayama
Volume72
Issue number3
Publication statusPublished - 2018

Keywords

  • Cardiac
  • Infant
  • Inversion recovery T1 turbo field echo
  • Magnetic resonance imaging
  • Navigator echo

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)

Fingerprint Dive into the research topics of 'Image evaluation of free-breathing navigator echo and triggered cardiac-gated delayed myocardial enhancement magnetic resonance imaging in sedated infants'. Together they form a unique fingerprint.

Cite this