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Abstract #4487

T1ρ imaging in hip cartilage: A comparative study in hips with and without cam type deformity

Gerd Melkus1,2, Helen Anwander3, Kawan S Rakhra1,2, and Paul E Beaulé3,4

1Medical Imaging, The Ottawa Hospital, Ottawa, ON, Canada, 2Radiology, University of Ottawa, Ottawa, ON, Canada, 3Orthopaedic Surgery, The Ottawa Hospital, Ottawa, ON, Canada, 4Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada

In this study we systematically investigated the analysis of hip cartilage T1ρ images in healthy as well as asymptomatic and symptomatic subjects with cam deformities. Hips with cam-type deformity showed a significant T1ρ prolongation compared to the healthy subjects indicating loss of proteoglycan in the lateral third of the anterosuperior quadrant. A significant correlation between entire hip cartilage T1ρ values and WOMAC subscore pain was found. The study shows that in the presence of a cam deformity, T1ρ has the ability to detect proteoglycan depletion, the earliest stage of cartilage degeneration, even before to symptoms occur.

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