Unlike normal X-ray, Computed Tomography (CT) scans the human body as the X-ray generator rotates around the person who lies down in a large cylindrical machine with a hole.
When you take a regular X-ray image, you can see many overlapped images, but if you take a CT scan, you can see a clear two-dimensional image of a certain area of the body as the entire series of pictures produced in CT is like a loaf of sliced bread.

And computer programs can be used to create three-dimensional images.
As CT uses computer programs, you can identify the density difference between very small tissues of the human body, which allows us to early detect a disease and to see the detailed composition.
The examination takes about 10-20 minutes.
The machine starts to buzz when the scanning begins. This sound is a sign that X-ray equipment is working properly by rotating around the patient.

Because a CT scan is now commonly used, almost all diseases are subject to screening.
In particular, a CT scan can examine almost all diseases, such as cerebropathia, head and neck tumor, lung cancer, esophageal cancer, river cancer, gastrointestinal tumor, and bone tumor, and help identify damages to each part of the body such as head injury.
Especially, pictures produced during a CT procedure well shows soft tissues, which helps diagnose spinal diseases such as ruptured cervical disk.

As X-ray equipment rotates around the body during the process, patients can be exposed to radiation than normal X-ray scans.
Therefore, if you are pregnant or suspected to be pregnant, you should let the health care provider and the technologist know to avoid scanning.