Q. What's the difference between a CT scan and an MRI?
The CT scan, MRI and others are known as diagnostic-imaging tests.
Let's go over the common ones.
One of the oldest forms of medical imaging, an X-ray examination uses electromagnetic radiation to make pictures.
An X-ray machine passes a beam through your body and records an image digitally or on film. Body tissues produce different results. Tissues show up in shades of gray. Bones look white. Lungs that contain air appear dark.