CT and MRI have their own advantages, and their focus is different, so it is not possible to say in general which one is better, only that when different diseases appear, you can judge which test to perform according to the specific condition of the body. For example, CT is able to examine most of the organs in the body, especially the lungs and head, while it is inferior to bones and joints. CT has a certain amount of radiation, but MRI does not, so it is suitable for a wider range of people, but MRI is not suitable for patients with metal foreign bodies.