If you suspect ligament damage, meniscal damage, synovitis or joint effusion in the knee joint, and the diagnosis is not clear from X-ray or CT, you will need an MRI. The cost of MRI is related to the resolution of the machine. For an ordinary 1.5T MRI, the examination cost is about 500 yuan, while for a 3.0T high-resolution MRI, the examination cost should be about 1000 yuan, and these examination costs are only for one knee joint. In the process of doing the examination, the body should not have any metallic substances, such as dentures, rings, keys, belts or even surgical internal fixation plates. It is because the cost of the examination is not low that you must first let your doctor determine if there is a need for an MRI.