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 journalArticle

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 - Jan 1 2018

Fingerprint

Magnetic resonance
Signal to noise ratio
Respiration
Magnetic Resonance Imaging
Imaging techniques
Recovery
Pediatrics
Image quality
Signal-To-Noise Ratio
Magnetization
Noise
Artifacts
Population

Keywords

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

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)

Cite this

Image evaluation of free-breathing navigator echo and triggered cardiac-gated delayed myocardial enhancement magnetic resonance imaging in sedated infants. / Matsuura, Ryutaro; Goto, Sachiko; Sato, Shuhei; Akagi, Noriaki; Tahara, Seiji.

In: Acta Medica Okayama, Vol. 72, No. 3, 01.01.2018, p. 267-273.

Research output: Contribution to journalArticle

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