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Background: Tibiofemoral rotation is an emerging parameter, especially in assessing patellofemoral instability. However, reference values in the literature are inconsistent regarding the used imaging modality and do not consider the effect of knee flexion during image acquisition. Purpose: To analyze the differences in tibiofemoral rotation measurements between computed tomography (CT) and magnetic resonance imaging (MRI). Study Design: Cross-sectional study; Level of evidence, 3. Methods: test. Results: < .001). Conclusion: Tibiofemoral rotation measurements significantly differed between CT and MRI, with larger values observed in CT. The difference between imaging modalities correlated with the degree of knee flexion during image acquisition. This observation should be considered when assessing tibiofemoral rotation, as current reference values in the literature are inconsistent regarding the used imaging modality.
Jud et al. (Wed,) studied this question.
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