Intermachine variation of ultrasound strain elastographic measures of the quadriceps and patellar tendons in healthy participants

Research output: Contribution to journalArticle

Abstract

ObjectivesTo evaluate intermachine variation and compare intraoperator and interoperator agreement and repeatability characteristics of 2 ultrasound (US) systems for measurements of quadriceps and patellar tendons by strain elastography (SE).

MethodsForty tendons from 20 healthy participants were investigated by operators with different experience (operator 1, 12 years of US experience and >50 SE examinations; operator 2, no US experience and 1 day of SE training). Repeated measures were performed on GE Healthcare (Waukesha, WI) and Esaote (Genoa, Italy) US systems. The percentage of agreement, Cohen κ, intraclass correlation coefficient, and correlation tests assessed agreement, repeatability, and associations of SE measures. A paired t test and Wilcoxon signed rank test assessed differences in SE measures.

ResultsThe study participants included 5 male and 15 female volunteers (mean [range] age, 29.3 [21–39] years). Better agreement and repeatability characteristics were observed for the patellar compared to the quadriceps tendon and the color score (CS) method over the elasticity ratio (ER). Intraoperator agreement was better for the experienced operator. Intraoperator repeatability was achieved in 55% of ER (intraclass correlation coefficient, 0.40–0.91; P < .05) and 77% to 85% (κ = –0.25–1) of CS measures. Interoperator repeatability was achieved in 35% (t/z, –2.93–7.94; P < .001–.048) of all ER measures. No significant differences in proximal (z, –0.13– –0.78) and distal patellar (z, –1.52–2.26; P > .5) patellar ER measures were observed. Seventy‐four percent to 75% mean agreement (κ = 0–0.5) for CS measures comparable across both US systems was observed. Intermachine ER associations were poor (r = –0.39–0.13; P > .05), whereas greater than 70% agreement (κ = –0.87–0.53) for the CS was achieved.

ConclusionsThe reproducibility of knee tendon SE measurements is influenced by the operator experience, US system, and tendon site.
Original languageEnglish
Number of pages11
JournalJournal of Ultrasound in Medicine
Early online date25 Jan 2020
DOIs
Publication statusE-pub ahead of print - 25 Jan 2020

Fingerprint

Elasticity Imaging Techniques
Patellar Ligament
Healthy Volunteers
Elasticity
Tendons
Color
Nonparametric Statistics
Italy
Volunteers
Knee
Delivery of Health Care

Keywords

  • comparison
  • elastography
  • healthy participants
  • knee tendon
  • ultrasound

Cite this

@article{f103b5ff2f7f410e89e2a13b2d0ffe35,
title = "Intermachine variation of ultrasound strain elastographic measures of the quadriceps and patellar tendons in healthy participants",
abstract = "ObjectivesTo evaluate intermachine variation and compare intraoperator and interoperator agreement and repeatability characteristics of 2 ultrasound (US) systems for measurements of quadriceps and patellar tendons by strain elastography (SE).MethodsForty tendons from 20 healthy participants were investigated by operators with different experience (operator 1, 12 years of US experience and >50 SE examinations; operator 2, no US experience and 1 day of SE training). Repeated measures were performed on GE Healthcare (Waukesha, WI) and Esaote (Genoa, Italy) US systems. The percentage of agreement, Cohen κ, intraclass correlation coefficient, and correlation tests assessed agreement, repeatability, and associations of SE measures. A paired t test and Wilcoxon signed rank test assessed differences in SE measures.ResultsThe study participants included 5 male and 15 female volunteers (mean [range] age, 29.3 [21–39] years). Better agreement and repeatability characteristics were observed for the patellar compared to the quadriceps tendon and the color score (CS) method over the elasticity ratio (ER). Intraoperator agreement was better for the experienced operator. Intraoperator repeatability was achieved in 55{\%} of ER (intraclass correlation coefficient, 0.40–0.91; P < .05) and 77{\%} to 85{\%} (κ = –0.25–1) of CS measures. Interoperator repeatability was achieved in 35{\%} (t/z, –2.93–7.94; P < .001–.048) of all ER measures. No significant differences in proximal (z, –0.13– –0.78) and distal patellar (z, –1.52–2.26; P > .5) patellar ER measures were observed. Seventy‐four percent to 75{\%} mean agreement (κ = 0–0.5) for CS measures comparable across both US systems was observed. Intermachine ER associations were poor (r = –0.39–0.13; P > .05), whereas greater than 70{\%} agreement (κ = –0.87–0.53) for the CS was achieved.ConclusionsThe reproducibility of knee tendon SE measurements is influenced by the operator experience, US system, and tendon site.",
keywords = "comparison, elastography, healthy participants, knee tendon, ultrasound",
author = "Dickson, {Diane M.} and Fawole, {Henrietta O.} and Hendry, {Gordon J.} and Smith, {Stephanie L.}",
note = "Acceptance from webpage AAM: 12m embargo",
year = "2020",
month = "1",
day = "25",
doi = "10.1002/jum.15228",
language = "English",

}

Intermachine variation of ultrasound strain elastographic measures of the quadriceps and patellar tendons in healthy participants. / Dickson, Diane M.; Fawole, Henrietta O.; Hendry, Gordon J.; Smith, Stephanie L.

In: Journal of Ultrasound in Medicine, 25.01.2020.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Intermachine variation of ultrasound strain elastographic measures of the quadriceps and patellar tendons in healthy participants

AU - Dickson, Diane M.

AU - Fawole, Henrietta O.

AU - Hendry, Gordon J.

AU - Smith, Stephanie L.

N1 - Acceptance from webpage AAM: 12m embargo

PY - 2020/1/25

Y1 - 2020/1/25

N2 - ObjectivesTo evaluate intermachine variation and compare intraoperator and interoperator agreement and repeatability characteristics of 2 ultrasound (US) systems for measurements of quadriceps and patellar tendons by strain elastography (SE).MethodsForty tendons from 20 healthy participants were investigated by operators with different experience (operator 1, 12 years of US experience and >50 SE examinations; operator 2, no US experience and 1 day of SE training). Repeated measures were performed on GE Healthcare (Waukesha, WI) and Esaote (Genoa, Italy) US systems. The percentage of agreement, Cohen κ, intraclass correlation coefficient, and correlation tests assessed agreement, repeatability, and associations of SE measures. A paired t test and Wilcoxon signed rank test assessed differences in SE measures.ResultsThe study participants included 5 male and 15 female volunteers (mean [range] age, 29.3 [21–39] years). Better agreement and repeatability characteristics were observed for the patellar compared to the quadriceps tendon and the color score (CS) method over the elasticity ratio (ER). Intraoperator agreement was better for the experienced operator. Intraoperator repeatability was achieved in 55% of ER (intraclass correlation coefficient, 0.40–0.91; P < .05) and 77% to 85% (κ = –0.25–1) of CS measures. Interoperator repeatability was achieved in 35% (t/z, –2.93–7.94; P < .001–.048) of all ER measures. No significant differences in proximal (z, –0.13– –0.78) and distal patellar (z, –1.52–2.26; P > .5) patellar ER measures were observed. Seventy‐four percent to 75% mean agreement (κ = 0–0.5) for CS measures comparable across both US systems was observed. Intermachine ER associations were poor (r = –0.39–0.13; P > .05), whereas greater than 70% agreement (κ = –0.87–0.53) for the CS was achieved.ConclusionsThe reproducibility of knee tendon SE measurements is influenced by the operator experience, US system, and tendon site.

AB - ObjectivesTo evaluate intermachine variation and compare intraoperator and interoperator agreement and repeatability characteristics of 2 ultrasound (US) systems for measurements of quadriceps and patellar tendons by strain elastography (SE).MethodsForty tendons from 20 healthy participants were investigated by operators with different experience (operator 1, 12 years of US experience and >50 SE examinations; operator 2, no US experience and 1 day of SE training). Repeated measures were performed on GE Healthcare (Waukesha, WI) and Esaote (Genoa, Italy) US systems. The percentage of agreement, Cohen κ, intraclass correlation coefficient, and correlation tests assessed agreement, repeatability, and associations of SE measures. A paired t test and Wilcoxon signed rank test assessed differences in SE measures.ResultsThe study participants included 5 male and 15 female volunteers (mean [range] age, 29.3 [21–39] years). Better agreement and repeatability characteristics were observed for the patellar compared to the quadriceps tendon and the color score (CS) method over the elasticity ratio (ER). Intraoperator agreement was better for the experienced operator. Intraoperator repeatability was achieved in 55% of ER (intraclass correlation coefficient, 0.40–0.91; P < .05) and 77% to 85% (κ = –0.25–1) of CS measures. Interoperator repeatability was achieved in 35% (t/z, –2.93–7.94; P < .001–.048) of all ER measures. No significant differences in proximal (z, –0.13– –0.78) and distal patellar (z, –1.52–2.26; P > .5) patellar ER measures were observed. Seventy‐four percent to 75% mean agreement (κ = 0–0.5) for CS measures comparable across both US systems was observed. Intermachine ER associations were poor (r = –0.39–0.13; P > .05), whereas greater than 70% agreement (κ = –0.87–0.53) for the CS was achieved.ConclusionsThe reproducibility of knee tendon SE measurements is influenced by the operator experience, US system, and tendon site.

KW - comparison

KW - elastography

KW - healthy participants

KW - knee tendon

KW - ultrasound

U2 - 10.1002/jum.15228

DO - 10.1002/jum.15228

M3 - Article

ER -