MRI Knee is an imaging test that provides detailed pictures of your knee. These images can help your doctor diagnose a wide range of conditions, including problems with the ligaments, tendons, cartilage, and other structures in your knee.More Unlike an X-ray, ultrasound, or CT scan, an MRI does not use radiation. Instead, the MRI machine uses magnetic fields and pulses of radio wave energy to make pictures. The pictures can show muscles, ligaments, tendons, cartilage, bone, and other joint structures that cannot be seen as well with other tests. In some cases, your doctor may administer a contrast dye to highlight certain areas in the knee. Precision Matters: Understanding the Importance of MRI in Knee Diagnosis The procedure is painless and noninvasive. You will lie on a padded table and the technician will slide you into the MRI machine feet first. The technician will give you instructions during the test, such as when to hold your breath or when to move. You will hear clicks, knocking, and whirring sounds during the scan, but you will not feel any discomfort. You can ask the technician to provide music or earplugs to mask the noise. The out-of-pocket cost of an MRI can vary widely across the country, depending on location and population. In a study published in the Journal of the American College of Radiology, researchers contacted centers across the United States to determine their prices for a non-contrast knee MRI and calculated the median costs within each locality and region.