Journal of Medical Ultrasonics

, Volume 41, Issue 1, pp 31–38 | Cite as

Normal values of liver elasticity measured by real-time tissue elastography (RTE) in healthy infants and children

  • Buket Selmi
  • Guido Engelmann
  • Ulrike Teufel
  • Saroa El Sakka
  • Monika Dadrich
  • Jens-Peter Schenk
Original Article

Abstract

Purpose

To define normal values of liver elasticity measured by real-time tissue elastography (RTE) in healthy infants and children.

Methods

RTE was performed on 91 children and adolescents by two experienced observers (female, n = 43; male, n = 48) and in two age groups (0–10 years, n = 45; 11–20 years, n = 46). Hepatopathies were excluded clinically by extensive laboratory testing and by ultrasound. RTE provides a histogram from a region of interest (ROI) in the liver representing the degree of stiffness of the liver. The distribution of the colors in the histogram corresponds to organ elasticity. By calculating the mean of stiffness values, a numerical value is expressed in arbitrary units (a.u.) representing the mean elasticity of the liver (MEAN). Additionally, the percentage values of relatively stiffer areas (color coded in blue) in the ROI can be calculated (%AREA). A Mann–Whitney U test was performed for these two parameters according to gender. The reproducibility of these values was determined with an intraclass correlation coefficient (ICC) test on another group of 18 healthy volunteers.

Results

The median elasticity was 106 a.u. Gender did not have an influence on the parameters (MEAN: p = 0.052; %AREA: p = 0.051). Age-specific analyses did not yield any significant difference between the two age groups for either of the two analyzed parameters (MEAN: p = 0.059; %AREA: p = 0.058). The ICC test demonstrated a moderate agreement for MEAN (ICC = 0.582) and %AREA (ICC = 0.659).

Conclusion

Real-time elastography is a new sonography-based method and may be used as a supportive analysis to assess liver parenchyma elasticity in children, especially when fibrosis is suspected. We measured RTE normal values in children as reference data.

Keywords

Real-time tissue elastography Liver stiffness Control value Children Gastroenterology 

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Copyright information

© The Japan Society of Ultrasonics in Medicine 2013

Authors and Affiliations

  • Buket Selmi
    • 1
  • Guido Engelmann
    • 2
  • Ulrike Teufel
    • 2
  • Saroa El Sakka
    • 1
  • Monika Dadrich
    • 1
  • Jens-Peter Schenk
    • 1
  1. 1.Division of Pediatric Radiology, Department of Diagnostic and Interventional RadiologyUniversity Hospital HeidelbergHeidelbergGermany
  2. 2.Department of General PediatricsUniversity Hospital HeidelbergHeidelbergGermany

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