Thanks to the modern CT scanner, medical professionals can now examine every part of the human body. After the procedure, the computer device displays the result on the monitor screen in the form of a 3D model of the scanned organ, plus a complete analysis of it.

The main advantage of this type of equipment is: high quality of images and their processing. Therefore, tomographs are indispensable in all branches of medicine.

There are three types of such devices in the medical market:

– magnetic resonance imaging;
– multislice computed tomography;
– Positron or two-photon emission.

Magnetic resonance imaging (MRI), in turn, come in three types: closed, open and mobile. MRI machines differ in the type of magnets used, namely:

– equipment with permanent magnets made of ferromagnetic alloys;
– device with a resistive electromagnet (this is a solenoid made of iron and copper wire);
– models with superconducting electromagnets (solenoid of niobium-titanium alloy).

Computed tomographs are also found in three types:

– single-slice spiral (the surface with the sensors and the radiation source move synchronously in the process);
– with two X-ray tubes (makes the clearest tomogram of the heart, each tube works in autonomous mode);
– multilayer (has several rows of receiving sensors, makes it possible to examine the entire organ).

Each type of CT scan may differ from each other according to the following parameters: speed of full rotation, type of moving part of the device, absence or presence of oblique slices. The most advanced CTs can scan at three revolutions per second. Certain models may have options to provide comfort and a quiet environment for patients. Children are provided with cartoons to watch during the examination, and people with poor hearing are usually repeated voice commands.

Open CT scanners have more open space and a smaller work area surface, which helps patients go through the procedure more relaxed. But they are equipped with a lower magnetic field, the examination time increases and the quality of the images wants to be better.

Closed models of tomographs are characterized by a closed working space, in general the patient is entirely in the equipment, there are openings only at the feet and head of the patient, which sometimes has a negative effect on people with an anxious psyche. They have a high power of magnetic field, it reduces the examination time and produces images of high quality.

Mobile models of this equipment allow the examination to be carried out at any place. The design is a container inside which the tomograph is located, with the container on a mobile platform that is transported to any location.

The MRI image is obtained thanks to radio impulse transmitters, which generate waves of resonant frequency and convert them into pulses of the required shape, and the receiving coil is a sensitive antenna, which is located perpendicular to the direction of the main magnetic field.