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Abstract #0970

Quantitative Assessment of Patellar Tendon Recovery and Anterior Cruciate Ligament Graft Quality using Bi-exponential UTE-T1ρ Mapping

Hector Lise de Moura1, Mahesh Keerthivasan2, Pan Su3, Gregor Koerzdoerfer2, Michael J Alaia4, and Ravinder Regatte5
1NYU Langone Health, New York, NY, United States, 2Siemens Medical Solutions USA Inc, Malven, PA, United States, 3MR Application Predevelopment, Siemens Healthineers AG, Erlangen, Germany, 4Department of Orthopaedic Surgery, NYU Grossman School of Medicine, New York, NY, United States, 5NYU Grossman School of Medicine, New York, NY, United States

Synopsis

Keywords: Tendon/Ligament, Quantitative Imaging

Motivation: Many joint tissue components (e.g., ligaments and tendons), have relatively short T2* relaxation and are difficult to image with conventional sequences. UTE-Tsequences can boost the SNR in the knee and increase precision for a wide range of tissues.

Goal(s): Evaluate the feasibility of a UTE-T1ρ sequence for patellar tendon (PT) recovery and ligament graft quality in ACLR patients.

Approach: UTE and non-UTE sequences were used to measure T1ρ in the knee joint. Non-parametric U-tests were used to assess significance.

Results: Significant differences were found between the sequences in the PT donor site and ACL in healthy and reconstructed patients.

Impact: The sequence demonstrates potential as a tool for assessing maturity of ACL grafts. It can help understand the recovery of PT, the quality of ACL reconstruction, and risk of post-traumatic osteoarthritis. This knowledge could improve surgical techniques and rehabilitation protocols.

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