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Letter to the Editor

We read with great interest the recent article entitled "Quantitative Imaging of ACL Graft Demonstrates Longitudinal Compositional Changes and Relationships with Clinical Outcomes at Two Years after ACL Reconstruction" by Lansdown et al.1 The purpose of this article is to identify the differences in the remodeling process between allogeneic and autologous tendon grafts used for reconstruction of the human ACL by T1ρ and T2 values after surgery. We really appreciate the hard work that has done by the authors. However, there are worthy while issues need to be explored. This article is protected by copyright. All rights reserved.