Ultrasound elastography-based assessment of the elasticity of the supraspinatus muscle and tendon during muscle contraction

Takayuki Muraki, Hiroaki Ishikawa, Shuhei Morise, Nobuyuki Yamamoto, Hirotaka Sano, Eiji Itoi, Shin ichi Izumi

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

Background: Although elasticity of the supraspinatus muscle and tendon is a useful parameter to represent the conditions of the supraspinatus muscle and tendon, assessment of the elasticity in clinical settings has not been established. The purpose of this study was to determine the elasticity of the supraspinatus muscle belly and tendon under different muscle contraction conditions using ultrasound real-time tissue elastography (RTE). Methods: Twenty-three healthy individuals participated in this study. Ultrasound RTE was used for elasticity measurements of the muscle belly and tendon of the supraspinatus muscle. The elasticity was defined as the ratio of strain in the tissues to that in an acoustic coupler (reference). A greater ratio indicated that the tissue was softer. Measurements were performed with study subjects in the lateral decubitus position at 10° of shoulder abduction under conditions of (1) no contraction, (2) isometric contraction without a weight, and (3) isometric contraction with a 1-kg weight. Results: The intraclass correlation coefficient (ICC1,3) of 3 measurements under each condition ranged from 0.931 to 0.998, showing high intraobserver reliability. Strain ratios for both the supraspinatus muscle belly and tendon significantly decreased with increases in muscle contraction (P<.001). Conclusions: Ultrasound RTE with the acoustic coupler has the potential to noninvasively detect changes in the elasticity of the supraspinatus muscle belly and tendon that accompany varying levels of muscle contraction in clinical practice.

Original languageEnglish
Pages (from-to)120-126
Number of pages7
JournalJournal of Shoulder and Elbow Surgery
Volume24
Issue number1
DOIs
Publication statusPublished - 2015

Keywords

  • Basic Science Study
  • Biomechanics
  • Elasticity
  • Imaging
  • Muscle contraction
  • Rotator cuff
  • Shoulder
  • Strain
  • Supraspinatus muscle
  • Ultrasound elastography

ASJC Scopus subject areas

  • Surgery
  • Orthopedics and Sports Medicine

Fingerprint Dive into the research topics of 'Ultrasound elastography-based assessment of the elasticity of the supraspinatus muscle and tendon during muscle contraction'. Together they form a unique fingerprint.

  • Cite this