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. 2017 Apr-Jun;27(2):181-186.
doi: 10.4103/ijri.IJRI_222_16.

Evaluation of patella alta using MRI measurements in adolescents

Barış Yılmaz  1 , Guzelali Ozdemir  2 , Evrim Sirin  1 , Esin D Cicek  3 , Burcu S Anıl  3 , Goncagul Bulbun  3
Affiliations

Evaluation of patella alta using MRI measurements in adolescents

Barış Yılmaz et al. Indian J Radiol Imaging. 2017 Apr-Jun.

Abstract

Purpose: To determine whether or not there were any differences in the measurement techniques used by orthopedic and radiology specialists in the evaluation of magnetic resonance (MR) images for the diagnosis of patella alta in adolescents.

Materials and methods: Evaluations were performed by three orthopedic specialists (Group I) and three radiology specialists (Group II) regarding the presence of patella alta in 40 adolescents cases using the Insall-Salvati, Caton-Deschamps, Blackburne-Peel, and modified Insall-Salvati indices on MR images obtained to diagnose patellar instability.

Results: The Fleiss Kappa conformity levels for Insall-Salvati, Caton-Deschamps, Blackburne-Peel, and modified Insall-Salvati measurements were 0.531, 0.559, 0.246, and 0.272, respectively, in Group I, and 0.699, 0.346, 0.516, and 0.394, respectively, in Group II.

Conclusion: The radiology specialists were found to have greater conformity in the evaluation of all patella alta indices, which was probably due to their greater familiarity with radiological measurements than that of the orthopedic specialists.

Keywords: Blackburne–Peel; Caton–Deschamps; Insall–Salvati; modified Insall–Salvati; patella alta.

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Conflict of interest statement

There are no conflict of interest.

Figures

Figure 1
Figure 1
Insall–Salvati indices: from patellar bone length and patellar tendon length, the latter of which was defined as the distance between the proximal point of the tibial tuberosity and the inferior pole of patella
Figure 2
Figure 2
Caton–Deschamps indices: from patellar articular cartilage length and the distance between the lower point of the part of the patella that makes contact with the femur to the top of the tibial plateau
Figure 3
Figure 3
Blackburne–Peel indices: from patellar articular cartilage length and the distance between the tibial plateau line and the inferior pole of patellar articular cartilage
Figure 4
Figure 4
Modified Insall–Salvati indices: from patellar articular cartilage length and the distance between the the proximal point of the tibial tuberosity and the inferior pole of patellar articular cartilage
Figure 5
Figure 5
According to Orthopaedists and Radiologists, the Fleiss Kappa comformity level for all the measurements
See this image and copyright information in PMC

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