Pediatric Radiology

, Volume 44, Issue 2, pp 158–163

Ultrasound elastography in children: Establishing the normal range of muscle elasticity

Authors

    • Department of RadiologyMontefiore Medical Center
  • Erin F. FitzGerald
    • Department of RadiologyMontefiore Medical Center
  • Terry D. Amaral
    • Department of Orthopedic SurgeryMontefiore Medical Center
  • Monica Payares
    • Department of Orthopedic SurgeryMontefiore Medical Center
  • Terry L. Levin
    • Department of RadiologyMontefiore Medical Center
Original Article

DOI: 10.1007/s00247-013-2793-z

Cite this article as:
Berko, N.S., FitzGerald, E.F., Amaral, T.D. et al. Pediatr Radiol (2014) 44: 158. doi:10.1007/s00247-013-2793-z

Abstract

Background

Ultrasound elastography allows assessment of tissue elasticity. To the best of our knowledge, the elastography appearance of muscles in normal children has not been described.

Objective

To determine the US elasticity of muscles in children at rest and following exercise.

Materials and methods

Cine elastography of biceps brachii and rectus femoris muscles was obtained at rest and after exercise in 42 healthy children (23 males, 19 females; mean: 11.2 ± 4.4 years, range: 2–18 years). Elastography scores were assigned to each clip based on a five-point color scale. Mean elastography scores and standard deviations were calculated and resting and postexercise elastography scores were compared.

Results

Resting muscle elasticity was lower in the biceps brachii than in the rectus femoris (P = 0.008), and higher in the dominant than in the nondominant biceps brachii (P < 0.032). Rectus femoris elasticity was higher in males than females (P = 0.051). Postexercise muscle elasticity significantly increased in both the dominant and nondominant biceps brachii (P < 0.001) and in the rectus femoris (P < 0.001). There was no significant gender-related difference in postexercise muscle elasticity. Biceps brachii elasticity decreased and rectus femoris elasticity increased with increasing body mass index. Younger subjects had a greater change in muscle elasticity with exercise.

Conclusion

Resting muscle elasticity in children is significantly lower in the biceps brachii than in the rectus femoris and in the nondominant biceps brachii than in the dominant biceps brachii. Elasticity significantly increases immediately postexercise in both muscle groups; resting differences between biceps brachii and rectus femoris elasticity, and dominant and nondominant biceps brachii elasticity, do not persist after exercise. The change in muscle elasticity with exercise is higher in younger children.

Keywords

UltrasoundElastographyChildrenMuscle

Copyright information

© Springer-Verlag Berlin Heidelberg 2013