Comparison of manual two-dimensional and automated three-dimensional methods of assessing shoulder joint morphology through computed tomography images

Abstract

Objective: To evaluate the interobserver agreement in the measurement of anatomical parameters of the shoulder using manual methods of two-dimensional (2D) computed tomography (CT) unformatted in the plane of the scapula and to compare them with the automated measurement obtained through the Blueprint (Wright Medical, Memphis, TN, United States) software, which uses reconstructed threedimensional (3D) images. Methods: The present is a cross-sectional study in which 2D CT images of 38 patients with different diagnoses were used. The anatomical parameters were measured by the manual methods described by Friedman et al., the glenoid vault method, the Maurer et al. method, and shoulder subluxation according to Walch et al., by five independent qualified surgeons and compared with the parameters obtained through the Blueprint automated software. Results: Significant differences were found between the manual measurement version obtained through the Friedman et al. method and the automated version. The mean values found for inclination did not show statistically significant differences among the methods. The mean value found for subluxation showed significant differences between the average observed in the analyses performed by the automated method and those performed by the surgeons. Conclusion: The manual measurements of glenoid version and inclination performed by experienced surgeons are effective, and the vault method is superior to the Friedman et al. method in the analysis of severe glenoid deformities. Objetivo: Avaliar a concordância interobservador na medida dos parâmetros anatômicos do ombro utilizando métodos manuais de tomografia computadorizada (TC) bidimensional (2D) não formatada no plano da escápula e compará-los à medida automatizada obtida com o programa Blueprint (Wright Medical, Memphis, TN, Estados Unidos), que utiliza imagens tridimensionais (3D) reconstruídas. Método: Este é um estudo transversal com a utilização de imagens de TC 2D de 38 pacientes com diferentes diagnósticos. Os parâmetros anatômicos foram medidos pelos métodos manuais descritos por Friedman et al., o método de vault glenoidal, o de Maurer et al. e o de subluxação do ombro segundo Walch et al. por cinco cirurgiões qualificados e independentes, e comparados aos parâmetros obtidos pelo programa automatizado Blueprint. Resultado: Foram observadas diferenças significativas entre a versão de medida manual obtida pelo método de Friedman et al. e a versão automatizada. Os valores médios de inclinação não apresentaram diferenças estatisticamente significativas entre os métodos. A média observada de subluxação teve diferenças significativas entre as análises realizadas pelo método automatizado e pelos cirurgiões. Conclusão: As medidas manuais de versão e inclinação da glenoide realizadas por cirurgiões experientes são eficazes, e o método da abóbada é superior ao de Friedman et al. na análise de deformidades glenoidais graves.

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FILHO, Geraldo da Rocha Motta; AMARAL, Marcus Vinícius; COHEN, Márcio; CARVALHO, Marcio Schiefer de Sá; FONSECA, Raphael Soares da; OLIVEIRA, Ana Carolina Leal de. Comparison of manual two-dimensional and automated three-dimensional methods of assessing shoulder joint morphology through computed tomography images. Revista Brasileira de Ortopedia. São Paulo. v.59. S4. p590- 598. 2024 DOI https://doi.org/ 10.1055/s-0044-1786821

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