Computed tomography (CT or CT, CT, MSCT) is one of the key diagnostic methods for internal organs and systems using multilayer scanning due to x-rays. Simply put, a computer tomograph is “a larger and more powerful x-ray”
The traditional X-ray method (X-ray) can provide a picture in only one projection, when a CT scan allows you to view an object with super accuracy to a millimeter from all visible sides.
Principle of operation
In the process of examination by computed tomography, an x-ray tube emits a thin, fan-shaped beam of x-rays, which scans the body, moving around it in a circle. Opposite the X-ray tube, a circular system of detectors is installed that record the intensity of radiation after passing through the tissues of the body.
How is the computed tomography procedure?
The method of computed tomography can be divided into two types:
1. CT scan without contrast - native study (without the use of contrast medium)
2. CT scan with contrast - bolus test (using contrast medium)
Computed tomography without contrast is as follows:
1. You will be taken to the treatment room, where they will be asked to remove all metal objects located in the examination area (earrings, rings, bracelets, a bra with metal elements, etc.)
2. You will be asked to lie down on the soft mobile table of the tomograph. Throughout the scan, the table will move in a horizontal plane, and the ring with the detectors will rotate around you, while it is necessary to maintain complete immobility and follow the doctor's instructions (inhale, exhale, breath hold).
3. The research process assumes that at the time of the examination, only you will be in the room with the tomograph (treatment room). It’s not worth worrying about this, as our experts will observe you from the beginning to the end of the survey. The tomograph is also equipped with a feedback system, so that you will not only be seen, but also heard
Computed tomography with contrast is as follows:
When conducting a study with contrast, you will be given an intravenous catheter through which the radiopaque drug will enter your body. The placement of this catheter is similar to the most common intravenous injection, and the time of administration of the drug is absolutely painless. As a rule, the patient experiences pleasant warmth throughout his body, which can even have a positive effect on the course of the examination. The rest of the procedure repeats computed tomography without contrast.
An anesthetist will inform you about how the radiopaque substance is removed, or you can read about it in the article After CT