Volumetric Modulated Arc Therapy (VMAT)

Contact us

Talk to Someone or Make an Appointment

See all


Swedish Cancer Institute was one of the first cancer centers in the United States to introduce this novel radiation therapy delivery technique. With Volumetric Modulated Arc Therapy (VMAT), the Swedish radiation oncologists are able to treat more patients with complex cancers than they could in the past.

Patient  Benefits

Minimizes Exposure to Surrounding Healthy Tissues

The radiation is delivered only to the intended area resulting in fewer side effects

Less Treatment Time

VMAT cuts radiation treatment times by one-half to two-thirds through delivering a higher and more targeted dose to cancerous tumors, without compromising patient safety.

Greater Patient Comfort and Stillness

VMAT benefits patients who find it difficult to lie completely still for the typical 30 or more minutes of treatment time.

How VMAT Works

Contained. Right on Target

VMAT precisely conforms the radiation to the cancer. The radiation is delivered only to the intended area, allowing the radiation oncologist to spare more surrounding healthy tissue and better avoid nearby critical anatomy. To further ensure accuracy, 3D imaging at ultra-low doses allows the radiation oncologist and technologists to quickly and safely verify tumor position prior to treatment. Sophisticated monitoring tools further enhance precision by monitoring your treatment in real-time to ensure that the dose is delivered as precisely as your radiation oncologist prescribes it.

Single or Multiple Arc Delivery

rad_vmat_130 During VMAT treatment, the radiation machine rotates around the patient in single or a series of arcs delivering focused beams of radiation to the cancer. The shape and intensity of the radiation beams changes as the machine rotates. These features mean that, in effect, the beam of radiation can come from an infinite number of angles, thereby reducing the dose of radiation to normal tissue while increasing the dose to the cancer. The arc-based delivery also allows the radiation oncologist to treat tumors that are adjacent to critical structures in the body, such as a tumor that may be wrapped around an organ.

News Releases

June 10, 2009
Swedish Cancer Institute First in the U S to Treat Patients with New Radiation Therapy