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Abstract #5036

T2-mapping of Femoral Cartilage 3-months Following ACL Reconstruction Surgery

Marianne S. Black1,2, Katherine A. Young2, Akshay S. Chaudhari2,3, Bragi Sveinsson4, Feliks Kogan2, Uchechukwuka Monu2,5, Emily J. McWalter6, Marc E. Levenston1,2,3, Garry E. Gold2, and Brian A. Hargreaves2,3,5

1Mechanical Engineering, Stanford University, Stanford, CA, United States, 2Radiology, Stanford University, Stanford, CA, United States, 3Bioengineering, Stanford University, Stanford, CA, United States, 4Radiology, Massachusetts General Hospital, Boston, MA, United States, 5Electrical Engineering, Stanford University, Stanford, CA, United States, 6Mechanical Engineering, University of Saskatchewan, Saskatoon, SK, Canada

T2-mapping can be used to detect changes in cartilage following ACL injury that are indicative of cartilage degeneration. We imaged subjects at 3-weeks and 3-months post-ACL-reconstruction surgery to obtain T2 relaxation times for the femoral cartilage of both knees. A trend in increasing T2 relaxation times was observed for the injured knee at 3-months relative to 3-weeks, although this increase was not significant, while T2 remained consistent for the contralateral knee in this time. This work demonstrates that changes to cartilage may be occurring earlier than expected in the injured knee following ACL-reconstruction surgery.

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