CT (Computerized Axial Tomography)

What is CT (Computerized Axial Tomography)?

It is a diagnostic test used to create detailed images of internal organs, bones, soft tissues and blood vessels.

What does it consist of?

It is a medical test that reproduces multiple images of the inside of the body. Detailed images of the body are previewed through a monitor connected to an x-ray machine.

It is a painless procedure and a non-invasive and precise technique.

In addition, it allows to observe in greater detail the internal organs, blood vessels, bones and soft tissues than conventional X-ray examinations.

Why is it performed?

This type of test is used to look at organs and tissues in greater detail so that possible abnormalities or diseases can be detected more accurately and easily.

Some of the conditions that can be detected are:

  • Cancer.
  • Infectious and cardiovascular diseases.
  • Trauma.
  • Musculoskeletal disorders.


It is recommended not to eat or drink anything hours before the test and it is necessary to talk to the doctor in case there is a possibility of being pregnant or have an allergy to any contrast material.

At the time of starting the test, it will be forbidden to wear metal objects such as jewelry, dentures, glasses or hair clips.

How does it work?

During the examination, X-rays rotate around the body while data is processed to create cross-sectional, two-dimensional images of the body.

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One of the main advantages, in addition to the accuracy and detail of the images, is the speed at which the data is processed and the images are constructed.

Speed is important, especially when a CT scan is performed on a child or seriously ill persons, since it will not be necessary for them to remain still for a long period of time.

Steps to undergo a CT scan

  1. You will lie on the CT examination table, usually on your back.
  2. In principle, sedation will not be necessary, since the speed of image detection is fast.
  3. If contrast material is used, it will be swallowed or injected intravenously.
  4. The table will be moved so that the relevant images can be captured while the machine performs the scan.
  5. The examination will be completed once the images are detected and are of a quality for accurate interpretation.

The CT scan usually takes no longer than 30 minutes.


  • It is a simple, quick and painless test.
  • CT allows detailed images of the inside of the body to be recorded.
  • It is less sensitive to movement than MRI.
  • No traces of radiation remain in the body after the test.
  • Anyone can undergo a CT scan regardless of whether they have an implanted medical device. This is not allowed with MRI.