What is the difference between them?
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Xray is a 2D image of your body. Usually from the side or front and back. You stand in front of an Xray sensitive film, the X rays shoot through your body and affect the film.
CT scan is still using X rays to take pictures of your body, although it does rotate around your body to construct a 3D image. Imagine if you took a video camera and panned it 360 degrees around a person. Even the though video is 2D, the information from the video is enough to construct a 3D shape.
MRI images a body similar to a CT scan but it doesn’t use Xrays. Instead it uses a strong magnetic field to align the magnetic moment of certain chemicals in the body to respond to certain electromagnetic waves.
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