Quantitative Ultrasound of Skeletal Muscle: Reliable Measurements of Calibrated Muscle Backscatter from Different Ultrasound Systems

Craig M. Zaidman, Mark R. Holland, Michael S. Hughes

Research output: Contribution to journalArticlepeer-review

39 Scopus citations

Abstract

Widespread implementation of quantitative muscle ultrasonography in assessing skeletal muscle pathology is limited by an inability to replicate results between different ultrasound systems. We have developed a measurement of skeletal muscle pathology, calibrated muscle backscatter (cMB), which should be reproducible between different ultrasound systems. We compared the reliability of grayscale and cMB measurements between different ultrasound systems, configurations and region-of-interest (ROI) sizes. cMB of skeletal muscle was reliably measured (intraclass correlation coefficient [ICC] ≤0.98) despite very dissimilar grayscale levels (ICC ≤0.54). cMB reliability was highest between systems using similar settings (ICC: 0.82-0.98) and was lowest when transducer type varied (ICC: 0.47-0.71). Reliability was better from ROIs spanning a narrow range of depths compared with larger ranges. cMB measurements are more reliable than grayscale between different ultrasound systems and configurations. Measuring cMB could improve widespread implementation of quantitative ultrasound in assessments of skeletal muscle pathology.

Original languageEnglish
Pages (from-to)1618-1625
Number of pages8
JournalUltrasound in Medicine and Biology
Volume38
Issue number9
DOIs
StatePublished - Sep 2012

Keywords

  • Adults
  • Backscatter
  • Children
  • Muscle
  • Myopathy
  • Quantitative
  • Reliability
  • Ultrasound

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