What is a scanner?

Brain, heart, lungs, arteries, liver, gallbladder bile … indications of the scanner are wide, since the review to explore most of the organs. It is also often prescribed to clarify the results of an X-ray or ultrasound.

Conduct of the examination

CT scan uses X-rays emitted by a source placed in a rotating tube that looks like a “tunnel”. Contrary to conventional radiography, the radiation source is not fixed. It revolves around the body to explore. The rays are more or less absorbed by the tissues, depending on the density of the latter. The data collected after the passage of rays are then processed by a computer and converted to images. They generally show the “cuts” of the party explored a thickness of 1 to 10 mm “slice”.

Often, the examination requires the prior injection of a contrast. This improves the readability of the images. It is usually injected intravenously but an abdominal CT scan, for example, may be preceded by an enema.

In the examination room, the patient lies on a bed that will slowly move through the “tunnel”. It must remain motionless, sometimes stop breathing demand. His arms are arranged along the body or behind his head, according to the body part that is examined. The examination lasts about fifteen minutes.

Potential risks of the scanner

The CT scan is not painful.It uses X-rays, some precautions are necessary, especially during pregnancy. The injection of the contrast agent can also cause allergic reactions. Health professionals recommend that patients and provide them with as much information on their health: history of allergy, therefore, as well as heart, kidney, lung or diabetic.

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