How a linear accelerator works

6. 1. 2023

The Multiscan Oncology and Radiology Centre in Pardubice boasts state-of-the-art equipment for radiotherapy. The TrueBeam linear accelerator from the American company Varian Medical Systems, worth more than 80 million crowns, stands out above all for its versatility: it can be used to irradiate large and very small volumes.

"Radiotherapy is one of the most effective ways to treat cancer."

Linear Accelerator Up Close

At Multiscan, we use two TrueBeam linear accelerators. Both are equipped with a multi-blade collimator, an OBI system and a 6d irradiation table. One of them also has electron beam irradiation capability. Both TrueBeam devices are capable of irradiating patients with dynamic IMRT and RapidArc techniques.

FIXATION PAD (CHEST)

The TrueBeam linear accelerator uses state-of-the-art technology. With an irradiation table that allows movement in six axes, the patient's position can be more precisely adjusted before irradiation begins. The device has very intuitive controls for radiology assistants. The possibility of some automation can reduce the irradiation time. In the design of the TrueBeam linear accelerator, great attention was also paid to safety mechanisms. It allows radiology assistants to quickly verify that all planned movements of the linear accelerator and the irradiation table are safe, even before irradiation begins.


RESPIRATORY GATING DEVICE

Allows the automatic adaptation of the irradiation technique to the patient's breathing movements by the respiratory gating system and the application of high-precision stereotactic radiotherapy. By synchronizing the radiation with the patient's breathing movements, we achieve lower doses to the surrounding healthy tissues.


PROBES FOR SURFACE DOSE MEASUREMENT

The properties of the radiation beams are structurally modified compared to older devices. The higher dose rate reduces the irradiation time. TrueBeam provides high dose accuracy to the target volume, allowing a sufficiently high dose to be delivered while sparing the surrounding healthy tissues of the patient.


THERMOPLASTIC MASK

The thermoplastic mask is one of the devices used to immobilize the patient during radiation therapy. The mask is used during head or neck irradiation and is attached to the irradiation table. It adapts to the shape of the patient's body and gently fixes it in the right place. Polyester-based materials are used to produce the thermoplastic mask.

"The irradiation is painless and we monitor the patients throughout the process using an industrial camera."

Gallery