CT and MRI are two completely different imaging methods, which have obvious differences in many aspects: First, the imaging principle of both is different, CT uses X-rays to image the human body, so there is a certain amount of radiation to the human body, while MRI uses an external magnetic field to image the human body, so there is no radiation to the human body at all, which is relatively safer; Second, the imaging principle is different to determine the CT is suitable for the examination of almost all organs of the body, while MRI has a higher resolution of soft tissues and is more suitable for the head, abdomen and soft tissue systems such as blood vessels and nerves, but it is not able to examine patients with metallic substances in the body; third, the price is different, CT is relatively lower, usually between 100-200 yuan, while MRI is usually around 500 yuan. The price of CT is relatively lower, usually between$100-200, while MRI is usually around$500.