title: Reliability of ultrasound texture measures of Biceps Brachialis and Gastrocnemius Lateralis muscles' images.
abstract: Ultrasound (US) is an important tool for diagnosing of many musculoskeletal tissue conditions. Image texture analysis can be used to characterize this tissue. The complexity curve (CC) is a technique commonly used to characterize the number of grey-level transitions in an image. Variability and reliability of US texture measures in the muscle tissue are unavailable in the literature. The aim of this study was to determine the variability and reliability of five CC texture parameters from US images of healthy Biceps Brachialis and Gastrocnemius Lateralis (GL) muscles, with longitudinal and transversal orientations of the probe. Eight images per subject were obtained for 30 men in 2 days. Mean, standard deviation, coefficient of variation and intraclass correlation coefficient for the five parameters were calculated for regions of interest. Results showed that the variability was similar for both muscles and most of the parameters showed satisfactory reliability (r > 0·7) for the Biceps Brachialis with the transverse scan and for the GL with the longitudinal scan.
authors.affiliation: Biomedical Engineering Program - COPPE/UFRJ, Federal University of Rio de Janeiro, Rio de Janeiro, Brasil.
authors.forename: Newton
authors.initials: N
authors.lastname: da Silva Pereira Júnior
authors.affiliation: Biomedical Engineering Program - COPPE/UFRJ, Federal University of Rio de Janeiro, Rio de Janeiro, Brasil.|Physical Education Post-Graduation Program, Federal University of Rio de Janeiro, Rio de Janeiro, Brasil.
authors.forename: Thiago Torres
authors.initials: TT
authors.lastname: da Matta
authors.affiliation: National Institute of Metrology, Quality and Technology - INMETRO, Rio de Janeiro, Brasil.
authors.forename: André Victor
authors.initials: AV
authors.lastname: Alvarenga
authors.affiliation: Biomedical Engineering Program - COPPE/UFRJ, Federal University of Rio de Janeiro, Rio de Janeiro, Brasil.
authors.forename: Wagner Coelho
authors.initials: WC
authors.lastname: de Albuquerque Pereira
authors.affiliation: Biomedical Engineering Program - COPPE/UFRJ, Federal University of Rio de Janeiro, Rio de Janeiro, Brasil.|Physical Education Post-Graduation Program, Federal University of Rio de Janeiro, Rio de Janeiro, Brasil.
authors.forename: Liliam Fernandes
authors.initials: LF
authors.lastname: de Oliveira
mesh_terms: D000328:Adult; D064368:Healthy Volunteers; D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D008297:Male; D018482:Muscle, Skeletal / Q000000981:diagnostic imaging*; D011237:Predictive Value of Tests; D015203:Reproducibility of Results; D014463:Ultrasonography / Q000379:methods*; D055815:Young Adult
keywords: complexity curve; skeletal muscle; texture analysis; ultrasonography; variability