Abstract #5036

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

Marianne S. Black^1,2, Katherine A. Young², Akshay S. Chaudhari^2,3, Bragi Sveinsson⁴, Feliks Kogan², Uchechukwuka Monu^2,5, Emily J. McWalter⁶, Marc E. Levenston^1,2,3, Garry E. Gold², and Brian A. Hargreaves^2,3,5

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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