Related Experiment Video
Updated: Aug 20, 2026

Non-Invasive Compression-Induced Anterior Cruciate Ligament (ACL) Injury and In Vivo Imaging of Protease Activity in Mice
Published on: September 29, 2023
MR imaging evaluation of the postoperative knee
1Department of Diagnostic Imaging, Yale University School of Medicine, and Radiology Consultants, 40 Temple St, Suite 2B, New Haven, CT 06510, USA. troycemccauley@comcast.net
Abstract:
The increased number of patients undergoing arthroscopy or surgery of the knee for sports medicine injuries is leading to increased numbers of patients who require imaging after surgery because of failure to improve, recurrent symptoms, or new injury. As in preoperative patients, magnetic resonance (MR) imaging is the most valuable imaging method for postoperative evaluation of the knee. Surgical changes increase the difficulty of diagnosis of abnormalities in the knee with MR imaging. MR arthrography with direct intraarticular injection of contrast material can help improve evaluation of the postoperative meniscus and possibly help improve evaluation of anterior cruciate ligament grafts in patients after surgery. Recognition of the normal postoperative MR imaging appearance of the structures in the knee and of abnormalities is essential to accurate MR imaging evaluation of these patients.
Related Concept Videos
Imaging Studies IV: Magnetic Resonance Imaging
Imaging Studies II: Ultrasonography
Imaging Studies VII: Vascular Imaging