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The choice of a medical linear accelerator is the most important issue in the process of equipping the radiotherapy unit. These are in-demand devices in the field of oncology treatment.
The operation of the unit is based on the interaction of electrons, which are accelerated by the application of microwaves. They, in turn, are produced by a klystron or a magnetron. Thanks to this, it is possible to accelerate electrons to very high energies. Speed indicators are impressive in comparison with electrostatic acceleration. In most cases, the beam of accelerated electrons bends in the direction of the tumor in the patient's body due to the use of a special deflecting magnet. It provides not only a change in the direction of the beam, but also increases the efficiency of energy filtration. After the electrons are deflected towards the tumor, they are fixed on a special target. By striking it, high-energy bremsstrahlung X-rays are formed. It passes through an equalizing filter and is collimated by means of two rectangular collimators. Various modifications of equipment are presented on the market. Manufacturers offer:
The first are characterized by the acceleration of the beam by means of a vortex electric field. It is created by changing the magnetic field in the coils that cover the beam trajectory. In accelerators of direct action, the beams are accelerated by a high voltage. It can be impulsive or permanent. As a result, the energy received is limited by electrical breakdowns. The most common are resonance models. In such aggregates, the beams are accelerated because of the passage through the accelerating structure with a high-frequency electric field.
Concerning the functionality. Buying equipment for oncology department, it is necessary to focus on linear accelerators, which can boast of the following options:
When choosing equipment, consider its performance and ease of use.
The prices of some instruments can be as low as 30 000 USD or less, while the newest, high-tier systems may cost as much as 100 000 USD. Well-known brands of Linear Accelerator in the United States are Varian. Besides, one should understand that new and demo machines will cost more than refurbished or used ones. What is the difference? New machines have never been used. They have the manufacturer’s warranty. Demo machines are, as a rule, exhibition models. They have not been used in clinical practice but they have been often presented at exhibitions. As a result, the price is lower. Refurbished machines are used machines that have undergone improvements (refurbishment can be done at the manufacturer’s facilities or in private repair shops)
You can buy linear accelerators not only in the primary market. The price of used linear accelerator is more acceptable and attractive than the cost of new models. An excellent alternative offers BiMedis. On the portal, you can select the units with the necessary documents and guarantee. The service will help you choose the right option. To do this, just enter the name of the device in the search. Choosing the right price range, the manufacturer, models allows you to accelerate and rationalize the purchase of used linear accelerators.