Percentages represent the mean of the proportion of the difference between the highest and lowest determination obtained by each observer of the same image the first time it was assessed
Declarations
Author contributions
CGA, MVD: Conceptualization, Investigation, Writing—original draft, Writing—review & editing, Supervision. AAS, MTC, RM, NGM, and XCO: Investigation, Validation, Writing—review & editing. All authors read and approved the submitted version.
Conflicts of interest
The authors declare that they have no conflicts of interest.
Ethical approval
The study was approved by our local ethics committee for scientific studies (EXP 170522-ACT433). This study complies with the Declaration of Helsinki.
Consent to participate
Although no explicit patient participation was required for the conduct of the present study, previously stored images of patients and healthy subjects were used. Thus, con informed consent was extended nor used for purposes of present study.
Consent to publication
Not applicable.
Availability of data and materials
The results of the measurements performed were stored electronically in a database whose availability is open to any researcher, on demand.
Balint PV, Terslev L, Aegerter P, Bruyn GAW, Chary-Valckenaere I, Gandjbakhch F, et al. Reliability of a consensus-based ultrasound definition and scoring for enthesitis in spondyloarthritis and psoriatic arthritis: an OMERACT US initiative.Ann Rheum Dis. 2018;77:1730–5. [DOI] [PubMed]
Mandl P, Balint PV, Brault Y, Backhaus M, D’Agostino MA, Grassi W, et al. Clinical and ultrasound-based composite disease activity indices in rheumatoid arthritis: results from a multicenter, randomized study.Arthritis Care Res (Hoboken). 2013;65:879–87. [DOI] [PubMed]
Benjamin M, McGonagle D. The enthesis organ concept and its relevance to the spondyloarthropathies.Adv Exp Med Biol. 2009;649:57–70. [DOI] [PubMed]
de Miguel E, Cobo T, Muñoz-Fernández S, Naredo E, Usón J, Acebes JC, et al. Validity of enthesis ultrasound assessment in spondyloarthropathy.Ann Rheum Dis. 2009;68:169–74. [DOI] [PubMed]
Agache M, Popescu CC, Popa L, Codreanu C. Ultrasound enthesitis in psoriasis patients with or without psoriatic arthritis, a cross-sectional analysis.Medicina (Kaunas). 2022;58:1557. [DOI] [PubMed] [PMC]
Song Y, Mascarenhas S. A narrative review of the design of ultrasound indices for detecting enthesitis.Diagnostics (Basel). 2022;12:303. [DOI] [PubMed] [PMC]
Sconfienza LM, Albano D, Allen G, Bazzocchi A, Bignotti B, Chianca V, et al. Clinical indications for musculoskeletal ultrasound updated in 2017 by European Society of Musculoskeletal Radiology (ESSR) consensus.Eur Radiol. 2018;28:5338–51. [DOI] [PubMed]
Bruyn GA, Hanova P, Iagnocco A, d’Agostino MA, Möller I, Terslev L, et al. Ultrasound definition of tendon damage in patients with rheumatoid arthritis. Results of a OMERACT consensus-based ultrasound score focussing on the diagnostic reliability.Ann Rheum Dis. 2014;73:1929–34. [DOI] [PubMed]
Naredo E, D’Agostino MA, Wakefield RJ, Möller I, Balint PV, Filippucci E, et al.; OMERACT Ultrasound Task Force. Reliability of a consensus-based ultrasound score for tenosynovitis in rheumatoid arthritis.Ann Rheum Dis. 2013;72:1328–34. [DOI] [PubMed]
Naredo E, Möller I, Moragues C, de Agustín JJ, Scheel AK, Grassi W, et al. Interobserver reliability in musculoskeletal ultrasonography: results from a “Teach the Teachers” rheumatologist course.Ann Rheum Dis. 2006;65:14–9. [DOI] [PubMed] [PMC]
Nalbant MO, Inci E. The efficiency of gray-level ultrasound histogram analysis in patients with supraspinatus tendinopathy.Niger J Clin Pract. 2023;26:1709–15. [DOI] [PubMed]
Di Matteo A, Moscioni E, Lommano MG, Cipolletta E, Smerilli G, Farah S, et al. Reliability assessment of ultrasound muscle echogenicity in patients with rheumatic diseases: results of a multicenter international web-based study.Front Med (Lausanne). 2023;9:1090468. [DOI] [PubMed] [PMC]
Longo UG, Mazzola A, Magrì F, Catapano S, De Salvatore S, Carotti S, et al. Histological, radiological and clinical analysis of the supraspinatus tendon and muscle in rotator cuff tears.BMC Musculoskelet Disord. 2023;24:127. [DOI] [PubMed] [PMC]
Andreu Suarez A, Guillen Astete C, Tortosa Cabañas M, Manzo R, Cenicacelaya Olabarrieta X. Validación del análisis informático cuantitativo de imágenes ecográficas de los tendones aquileo y rotuliano en sujetos sanos. In: Blanco García FJ, editor. XLVIII Congreso Nacional de la Sociedad Española de Reumatología; 2022 May 10-13; Granada. Reum Clin; 2022. pp. 276–77. Spanish.
Wu WT, Chang KV, Hsu YC, Hsu PC, Ricci V, Özçakar L. Artifacts in musculoskeletal ultrasonography: from physics to clinics.Diagnostics (Basel). 2020;10:645. [DOI] [PubMed] [PMC]
Serafin-Król M, Maliborski A. Diagnostic errors in musculoskeletal ultrasound imaging and how to avoid them.J Ultrason. 2017;17:188–96. [DOI] [PubMed] [PMC]
