The difference between X-ray, CT and MRI is that the radiation is different, the lesions are different, the advantages are different and the price is also different. 1. Radiation is different: X-rays and CT have a certain ionizing radiation radiation to the body, while MRI does not have ionizing radiation. 2. Different advantages for different lesions at the same time: X-ray examination for bone and joint injuries and osteoarthritic lesions, chest lesions, is the routine preferred imaging method; CT cross-section scanning degree, resolution are extremely high, can better show the lesions inside the subtle knot; and magnetic resonance imaging is the best for soft tissue imaging. 3. Different prices: Generally speaking, X-ray is the cheapest, CT is a bit more expensive, and MRI is the most expensive, but the exact price may vary depending on the city and hospital. The choice of test requires the doctor to make a comprehensive judgment based on the patient’s condition.