Hepatic shear wave elastography in children under free-breathing and breath-hold conditions.
Eur Radiol
; 27(12): 5337-5343, 2017 Dec.
Article
em En
| MEDLINE
| ID: mdl-28634626
ABSTRACT
OBJECTIVES:
To compare hepatic 2D shear wave elastography (2D SWE) in children between free-breathing and breath-hold conditions, in terms of measurement agreement and time expenditure.METHODS:
A cohort of 57 children (12.7±4.3 years) who underwent standardized 2D SWE between May and October 2015 were retrospectively evaluated. Liver elastograms were obtained under free-breathing and breath-hold conditions and time expenditure was measured. Median stiffness, interquartile range (IQR), and IQR/median ratio were calculated based on 12, six, and three elastograms. Results were compared using Pearson correlation coefficient, intraclass correlation coefficient (ICC), Bland-Altman analysis, and Student's t.RESULTS:
Median liver stiffness under free-breathing and breath-hold conditions correlated strongly (7.22±4.5kPa vs. 7.21±4.11kPa; r=0.97, P<0.001). Time to acquire 12 elastograms with free-breathing was lower than that with breath-holding (79.3±32.5sec vs. 143.7±51.8sec, P<0.001). Results for median liver stiffness based of 12, six, and three elastograms demonstrated very high agreement for free-breathing (ICC 0.993) and for breath-hold conditions (ICC 0.994).CONCLUSIONS:
Hepatic 2D SWE performed with free-breathing yields results similar to the breath-hold condition. With a substantially lower time requirement, which can be further reduced by lowering the number of elastograms, the free-breathing technique may be suitable for infants and less cooperative children not capable of breath-holding. KEY POINTS ⢠Hepatic 2D SWE performed with free-breathing yields results similar to breath-hold condition. ⢠Benefit of the free-breathing approach is the substantially lower time requirement. ⢠Lowering the number of elastograms can further reduce time expenditure. ⢠Free-breathing 2D SWE is suitable in children with suspected liver disease.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Respiração
/
Ultrassonografia Doppler
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Técnicas de Imagem por Elasticidade
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Fígado
/
Hepatopatias
Tipo de estudo:
Diagnostic_studies
/
Observational_studies
Limite:
Adolescent
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Child
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Female
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Humans
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Male
Idioma:
En
Revista:
Eur Radiol
Assunto da revista:
RADIOLOGIA
Ano de publicação:
2017
Tipo de documento:
Article
País de afiliação:
Alemanha