Abstract #0204

UTE-T2* Shows Deep Cartilage Subsurface Matrix Changes 2 Years After ACL Reconstruction

Ashley Williams^1,2, Matthew Titchenal^1,2, Aditi Guha^1,2, Bao H. Do^2,3, and Constance R Chu^1,2

¹Department of Orthopaedic Surgery, Stanford University, Stanford, CA, United States, ²Veterans Affairs Palo Alto Health Care System, Palo Alto, CA, United States, ³Department of Radiology, Stanford University, Stanford, CA, United States

The purpose of this study is to compare 2-D and 3-D assessments of UTE-T2* maps for evidence of alterations to the subsurface cartilage matrix suggestive of cartilage at risk for early OA 2 years after ACL reconstruction. UTE-T2* values from small 2-D, single slice ROIs correlated to 3-D ROI values that encompassed a larger degree of weight-bearing cartilage. Results indicate that single slice 2-D UTE-T2* mapping may be an efficient means to assess the medial femoral cartilage as an imaging marker of pre-osteoarthritis while 3-D assessments provide additional sensitivity to changes in the tibial plateau.

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