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Variation in classification and measurement of patella height on Magnetic Resonance Imaging
EP34407
Poster Title: Variation in classification and measurement of patella height on Magnetic Resonance Imaging
Submitted on 30 Oct 2020
Author(s): Ashraf Y, Sait S, Javed H, Ashraf T
Affiliations: 1. University Hospitals Birmingham, Birmingham, UK B15 2TA 2. Kings College Hospital, London, UK 3. Royal Orthopeadic Hospital, Birmingham, UK
This poster was presented at BIR Annual Congress 2020
Poster Views: 350
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Poster Information
Abstract: Objective: Measuring and classifying the height of the patella is important in planning surgical treatment for patients with patella instability. The aim of this study was to determine whether there is variation between clinicians in measuring and classifying patella height used to evaluate patellar instability on MRI scans.
Materials and Methods: 118 clinicians (80 Orthopaedic surgeons, 18 Radiologists, and 20 Physiotherapists) involved in the treatment of patellofemoral joint problems were asked to independently calculate the patellotrochlear index (PTI) and classify the patella height into high (alta), normal (norma) or low (baja) position for MRI scans of three patients (A,B,C). The clinicians were also asked about their preferred imaging modality in measuring the patella height.
Results: There was no significant intra-rater variation between radiologists for all three patients. There was significant intra-rater variation amongst orthopaedic surgeons (P=0.003) and physiotherapists (P=0.002) for patient A, and amongst physiotherapists (P=0.003) for patient C. 100% of radiologists preferred using MRI scans for calculating and classifying patella height. Only 52% of orthopaedic surgeons and 20% of physiotherapists preferred the use of this modality.
Conclusion: This study highlights that amongst clinicians, radiologists have the lowest intra rater variation in calculating and classifying the patella height compared to other clinicians such as orthopaedic surgeons and physiotherapists. Therefore we recommend a standardised protocol for the measurement and classification of patellar height. We also recommend that there is a greater reliance on radiology MRI knee reports that include patella height measurements to achieve greater consistency and aid surgical planning.
Summary: This study highlights that amongst clinicians, radiologists have the lowest intra rater variation in calculating and classifying the patella height compared to other clinicians such as orthopaedic surgeons and physiotherapists. References: N/AReport abuse »
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