MR of the postoperative knee

Area of Science:

• Orthopedic Surgery
• Diagnostic Imaging
• Sports Medicine

Background:

• Arthroscopic techniques for meniscal surgery and anterior cruciate ligament (ACL) reconstruction have advanced.
• Postoperative patients are increasingly resuming active lifestyles, leading to more recurrent injuries.
• Magnetic resonance (MR) imaging is frequently used to evaluate these recurrent knee injuries.

Purpose of the Study:

• To discuss MR findings of retorn menisci and the utility of MR arthrography.
• To review the serial MR appearance changes of ACL grafts in the first year post-surgery.
• To describe MR findings following less common knee procedures.

Main Methods:

• Review of MR imaging findings in postoperative knee patients.
• Discussion of MR arthrography for meniscal pathology.
• Analysis of serial MR imaging of ACL grafts over 12 months.
• Description of MR imaging findings for other knee surgical procedures.

Main Results:

• Specific MR findings associated with retorn menisci are presented.
• The role of MR arthrography in diagnosing meniscal pathology is discussed.
• Typical changes in ACL graft appearance during the first year after surgery are outlined.
• The impact of these graft changes on diagnosing graft tears is evaluated.

Conclusions:

• MR imaging is crucial for evaluating recurrent knee injuries after arthroscopic surgery.
• Understanding serial MR changes in ACL grafts is essential for accurate diagnosis.
• MR arthrography aids in assessing meniscal integrity post-surgery.
• This review provides a guide to MR findings after various knee arthroscopic procedures.