The new TrueBeam™ system
from Varian Medical Systems is an advanced radiotherapy technology for treating
cancer. Opening up treatment options for people with cancer, it targets tumors
with accuracy measured in millimeters. With its power and flexibility,
clinicians can develop treatments that are best suited for patients’ individual
How does it work?
imaging, beam delivery and sophisticated motion management to accurately and
precisely target tumors with speed.
Here are some quick
TrueBeam rotates around the patient to deliver a prescribed
radiation dose from nearly any angle.
An accessory called a multileaf collimator (or MLC) is what shapes
the beam. It has 120 computer-controlled "leaves” or "fingers” that create
apertures of different shapes and sizes. The leaves sculpt the beam to
match the 3-D shape of the tumor. These can move and change during
treatment to target the tumor and minimize dose to the surrounding healthy
TrueBeam’s additional functionality provides for the acquisition of
a cone-beam CT, a form of CT, using 25% less X-ray dose than compared with
earlier Varian image-guided technologies. This means patients can be exposed
to less X-rays/radiation.
Real-time imaging tools allow clinicians to "see” the tumor they
are about to treat. This gives them confidence, and they can target tumors
with accuracy measured in millimeters.
The system includes a new "gated” option for synchronizing beam
delivery with respiration. This helps maintain accuracy as the system changes
its targeting whenever tumor motion is an issue, for example during lung
TrueBeam can be used for many forms of advanced treatment
techniques including image-guided radiotherapy (IGRT), intensity-modulated
radiotherapy (IMRT) and RapidArc® radiotherapy technology. Because of this, patients can receive the
treatment that is best suited for their specific clinical circumstances.