EvergreenHealth's advanced Varian Trilogy® linear accelerator is also able to provide an external beam radiation therapy called stereotactic radiation. It uses focused radiation beams to treat very small, well defined tumors or abnormalities with surgical-like precision.
It all begins with detailed imaging of the tumor done by both MRI and the GE wide-bore CT Simulator. These images are fused together and a dedicated computerized 3-dimensional treatment plan using the Brain Lab system is created to deliver the radiation dosage precisely to the tumor.
Prior to the treatment, the Trilogy's onboard imaging system - both standard X-rays and CT scans - is used to make sure the patient is perfectly aligned with the treatment plan before the beams are fired. With the high dosage of radiation given, it is critical to know that the target is absolutely right on.
Most patients will require just one treatment, with minimal discomfort and little or no side effects.
Another bonus of EvergreenHealth's stereotactic radiosurgery is patient comfort.
Other systems, like the Gamma Knife, require an invasive procedure where screws are drilled into the patient's skull in order to attach the ring which holds the head rigidly still during treatment.
This is not necessary with EvergreenHealth's Varian Trilogy technology. Instead, each patient is fitted with a custom head and face mask. The mask is put in warm water and then fitted to the patient's head for a perfect fit. The mask is anchored to the treatment table and the patient is held still - and comfortable - for the treatment.
There are two types of stereotactic radiation therapy:
Stereotactic radiosurgery, which involves delivering stereotactic radiation treatments to the brain or spine. This is done by a team involving a radiation oncologist and a neurosurgeon. It is typically used for:
Stereotactic body radiation therapy involves delivering stereotactic radiation treatments to all sites within the body, except for the brain or spine. This treatment is delivered by a radiation oncologist. It is typically used for:
Stereotactic radiation may be useful for other cancers not readily addressed with surgery or conventional radiation therapy.
To learn more, or to schedule an appointment, call EvergreenHealth Radiation Oncology at 425.899.1860