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. 2015 Dec 6;47(2):210-3.
doi: 10.1016/S2255-4971(15)30088-4. eCollection 2012 Mar-Apr.

ASSESSMENT OF PATELLAR HEIGHT MEASUREMENT METHODS FROM DIGITAL RADIOGRAPHY

Guilherme Conforto Gracitelli  1 , Rafael Pierami  1 , Thomaz Antonio Tonelli  1 , Guilherme Guadagnini Falótico  2 , Flavio Duarte Silva  3 , Gilberto Yoshinobu Nakama  4 , Carlos Eduardo da Silveira Franciozi  5 , Antonio Altenor Bessa de Queiroz  6 , Mario Carneiro Filho  7
Affiliations

ASSESSMENT OF PATELLAR HEIGHT MEASUREMENT METHODS FROM DIGITAL RADIOGRAPHY

Guilherme Conforto Gracitelli et al. Rev Bras Ortop. .

Abstract

Objective: To analyze the most common methods for measuring patellar height and the impact of observer experience in correlations with the other observers using digital radiography.

Methods: Sixty digital radiographs of the knee in lateral view were analyzed by four observers: a physician in the second year of medical residence in orthopedics (R2); a physician in the third year of medical residence in orthopedics (R3); an orthopedic surgeon who was a specialist in knee surgery (SK); and a radiologist who was a specialist in musculoskeletal radiology (SR). The indices used were: Insall-Salvati (IS), Blackburne-Peel (BP), Caton-Deschamps (CD) and modified Insall-Salvati (ISM). The interobserver agreement was calculated using the kappa coefficient (κ).

Results: The highest correlation coefficients were found when using the IS method followed by the CD method. The worst correlation was observed in the ISM method. The highest interobserver agreement was found between the orthopedic surgeon specializing in knee surgery and the radiologist specializing in musculoskeletal radiology, for the four measurement methods used.

Conclusion: Using digital radiography, the Insall-Salvati and Caton-Deschamps indexes presented the highest interobserver agreement, and this was also positively influenced by the observer's level of experience.

Keywords: Knee; Patella; Radiographic Image Enhancement.

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