MRI patellofemoral instability measurements (reporting aid)

Case contributed by Dai Roberts

Annotated images

Annotated image

Annotated images to aid in the reporting of patellofemoral instability on MRI.

*the parameters for the MRI Insall-Salvati and MRI modified Insall-Salvati indices differ from the radiographic indices.

**the Caton-Deschamps and de Carvalho indices are the radiographic parameters.

Case Discussion

Patella height, trochlear depth, and trochlear morphology are some of the measurements obtained when reporting cases of patellofemoral instability on MRI.  

The stacks of images can be used to conveniently review the different measurement techniques.  

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