Osteoarthritis of the Knee
Usually your doctor can diagnose your knee arthritis without any investigations. However, an x-ray may be done and this can show a narrowed space between your knee bones which indicates osteoarthritis. Sometimes blood tests, an MRI or a bone scan may be done to determine the state of the surrounding soft tissue if surgery is being considered. If your knee is swollen with fluid, sometimes it may be aspirated so the fluid can be tested on.