Weight Bearing Knee MRI
Weight bearing knee MRI demonstrates the status of anatomic structures of the knee while standing or bearing weight where most people experience knee pain or knee symptoms. Application of body weight during standing MRI compresses the hyaline cartilage of the knee and the knee menisci. Weight bearing knee MRI can be used to evaluate non-displaced osteochondral lesions (OCD). Knee joint fluid may be forced beneath the loose in-situ osteochondral fragment during weight-bearing MRI that might not be visible during non-weight-bearing MRI recumbent MRI. Distinguishing a loose in-situ OCD from a stable non-displace OCD has both prognostic and therapeutic significance.
A Meniscal tear may be separated into stable meniscal tear versus unstable meniscal tear. Some meniscal tears are not displaced when the patient is lying during conventional recumbent MRI. When a person is standing, body weight is applied to the torn meniscus and the torn fragments of the meniscus separate and may demonstrate the mechanical locking or meniscal displacement and instability that the patient describes. Weight-bearing MRI is a more physiologic MRI.
The kneecap or patella is a sesamoid bone within the knee extensor tendon mechanism that increase the power of knee extension. The patella is positioned within a grove within the front of the femur known as