Acta Medica Okayama 72巻 3号
2018-06 発行

Image Evaluation of Free-breathing Navigator Echo and Triggered Cardiac-gated Delayed Myocardial Enhancement Magnetic Resonance Imaging in Sedated Infants

Matsuura, Ryutaro Graduate School of Health Sciences, Okayama University
Goto, Sachiko Graduate School of Health Sciences, Okayama University
Sato, Shuhei Department of Health Informatics, Kawasaki University of Medical Welfare
Akagi, Noriaki Division of Radiology, Department of Medical Technology, Okayama University Hospital
Tahara, Seiji Division of Radiology, Department of Medical Technology, Okayama University Hospital
Publication Date
2018-06
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.
Document Type
Original Article
Keywords
magnetic resonance imaging
navigator echo
inversion recovery T1 turbo field echo
cardiac
infant
Link to PubMed
Thumnail 72_3_267.pdf 2.82 MB