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Accurate measurements of liver stiffness using shear wave elastography in children and young adults and the role of the stability index
- Source :
- Ultrasonography, Ultrasonography, Vol 37, Iss 3, Pp 226-232 (2018)
- Publication Year :
- 2017
- Publisher :
- Korean Society of Ultrasound in Medicine, 2017.
-
Abstract
- Purpose The purpose of this study was to evaluate the usefulness of the stability index (SI) in liver stiffness measurements using shear wave elastography (SWE) in children. Methods A total of 29 children and young adults (mean age, 16.1 years; range, 8 to 28 years; 11 boys and 18 girls) who underwent liver stiffness measurements using SWE under free-breathing and breath-holding conditions were included in our study. Ten SWE measurements were acquired in each of four groups: free-breathing and breath-holding, and with and without using the SI. The failure rate of acquisition of SI values over 90% was calculated in each group. To evaluate variability in the SWE measurements, the standard deviation, coefficient of variation, and percentage of unreliable measurements were compared. Intraobserver agreement and the optimal minimal number of measurements were calculated using intraclass correlation coefficients. Results A failure to acquire SI values over 90% was observed in 17% of the scans in the free-breathing group and in 7% of the scans in the breath-holding group. In both groups, utilizing the SI led to a significantly lower standard deviation and coefficient of variation. When using the SI, the percentage of unreliable measurements decreased from 16.7% to 8.3% in the free-breathing group and 14.8% to 0% in the breath-holding group. With the use of the SI, intraobserver agreement increased and the optimal minimal number of repeated measurements decreased in both the free-breathing and breath-holding groups. Conclusion Utilization of the SI in the measurement of liver SWE in children reduced measurement variability and increased reliability in both free-breathing and breath-holding conditions.
- Subjects :
- lcsh:Medical technology
Intraclass correlation
Coefficient of variation
Standard deviation
030218 nuclear medicine & medical imaging
03 medical and health sciences
0302 clinical medicine
Liver stiffness
Stability index
medicine
Radiology, Nuclear Medicine and imaging
Young adult
Children
Shear wave elastography
medicine.diagnostic_test
business.industry
digestive, oral, and skin physiology
lcsh:R855-855.5
Liver
030211 gastroenterology & hepatology
Original Article
Elastography
business
Nuclear medicine
Subjects
Details
- Language :
- English
- ISSN :
- 22885943 and 22885919
- Volume :
- 37
- Issue :
- 3
- Database :
- OpenAIRE
- Journal :
- Ultrasonography
- Accession number :
- edsair.doi.dedup.....72c5a8bc7609814d5ea7fd9fa1a6c36e