Journal Article 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

Acta Medica Okayama
72 ( 3 )  , pp.267 - 273 , 2018-06 , Okayama University Medical School
ISSN:0386-300X
NCID:AA00508441
Description
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.
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http://ousar.lib.okayama-u.ac.jp/files/public/5/56072/20180620090642708855/72_3_267.pdf

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