RapidArc radiotherapy technology

RapidArc™ radiotherapy technology from Varian Medical Systems is a new approach to image-guided, intensity-modulated radiation therapy (IG-IMRT) that delivers precise treatments in shorter times than conventional IMRT.

RapidArc™ represents a major medical advance and is more comfortable for patients because they spend less time in their daily treatments. A fast, precise RapidArc™ treatment takes less than two minutes. Patients can be in and out of treatment quickly and return to their daily routine.

RapidArc™ rotates 360 degrees around the patient, enabling the very small beams with varying intensity to be aimed at the tumor from multiple angles. Unlike helical IMRT treatments or other forms of radiation therapy, with RapidArc™ the radiation treatment being delivered to the patient can be modulated continuously throughout treatment. This means that higher doses of radiation are delivered to hit the tumor harder, and less radiation is delivered to surrounding healthy tissue.

RapidArc™ treatments are delivered using either a Clinac® or a Trilogy® linear accelerator from Varian Medical Systems outfitted with imaging capabilities. The RapidArc™ imaging capabilities let the clinician see the location of the tumor in three dimensions before treatment. If the cancer has moved due to physical changes, treatment can be adjusted so the patient receives a precise treatment. This treatment platform is the most widely used and reliable platform available.

Physician Benefits

RapidArc™ radiotherapy technology from Varian Medical Systems is a major advance in cancer treatment that improves dose conformity while significantly shortening treatment times for some types of cancer.

RapidArc™ is simple

RapidArc™ treatment dramatically reduces the amount of time spent in each treatment. Your patients face less discomfort and disruption, which helps lower the stress of treatment and enables them to quickly resume their daily activities and lifestyle.

RapidArc IMRT Dose Prostate

RapidArc™ is fast

RapidArc™ treatments can be delivered in less than two minutes, which is two to eight times faster than older forms of intensity-modulated radiation therapy (IMRT) and faster than helical IMRT. 

RapidArc™ delivers

RapidArc™ delivers precise treatments to match the tumor size and location, sparing the surrounding healthy tissue.

RapidArc™ is precise

RapidArc™ uses a unique Varian algorithm that provides exceptional treatment delivery control, resulting in improved dose conformity for greater normal tissue sparing and tumor control.

RapidArc™ is efficient

RapidArc™ combines unprecedented speed with remarkable precision. During treatment, the single gantry rotation speeds treatment delivery, so peripheral tissues receive a lower overall dose compared to conventional IMRT treatments.

Trilogy linear accelerator

How It Works

RapidArc™ radiotherapy technology from Varian Medical Systems delivers treatments using either a Clinac® or a Trilogy® linear accelerator, outfitted with an On-Board Imager® kV imaging system for using images to guide patient placement and treatment delivery. The linear accelerator rotates around the patient to deliver radiation treatments from nearly any angle. During a RapidArc™ treatment, radiation is shaped and reshaped as it is delivered continuously from virtually every angle in a 360-degree revolution around the patient.

RapidArc™ Planning

Like other forms of radiation therapy, RapidArc™ treatments are planned using sophisticated computer programs that analyze diagnostic image data and calculate the best way of delivering the radiation dose to minimize impact on healthy tissues for each patient.

RapidArc™ Imaging

Immediately prior to treatment, the exact location, size, and shape of the patient’s tumor is visually observed through a simple two-minute imaging procedure using the machine’s On-Board Imager.

RapidArc™ Positioning

After imaging is completed, the images are reviewed by the therapist and the patient’s position can be adjusted so that an accurate treatment can be delivered. The patient does not need to move off the treatment couch for this process – all adjustments are made automatically by the treatment couch.

RapidArc™ Treatment

A RapidArc™ radiotherapy treatment is delivered quickly – in less than two minutes, and with just one turn of the machine around the patient. RapidArc™ shapes and modulates a highly focused treatment beam so that it targets the tumor precisely, sparing surrounding healthy tissues. It treats the entire tumor with pinpoint accuracy and is easier on the patient, who does not have to hold still for long periods of time.

During a RapidArc™ treatment, the treatment beam is continually shaped by a multileaf collimator (MLC), a device with 120 computer-controlled mechanical “leaves” or “fingers” that move to create apertures of different shapes and sizes.

Patient Benefits

RapidArc™ radiotherapy technology from Varian Medical Systems represents a new revolution in cancer care. RapidArc™ enables your clinician to treat some types of cancer with great precision in less than two minutes.

  • RapidArc™ is delivered with a medical linear accelerator, which is a large machine that generates high-powered X-rays and rotates around you as you lie on a treatment couch, delivering the beams from many angles. With RapidArc, the entire treatment is completed with a single rotation of the machine.
  • RapidArc™ is a new approach to delivering image-guided, intensity-modulated radiation therapy (IG-IMRT). Image guidance improves tumor targeting, and IMRT shapes the radiation dose so it conforms closely to the three-dimensional shape of the tumor. That means more radiation is delivered to the tumor and less to surrounding healthy tissues.
  • The treatments are fast. That makes it easier on you – you don’t have to hold still for long, and you’re in and out in a matter of minutes each day. With RapidArc, IMRT treatments that typically require at least 10 minutes can be completed in less than two minutes.
  • A RapidArc™ radiotherapy system incorporates technology that makes it possible for your treatment team to position you for treatment with sub-millimeter accuracy. An On-Board Imager® kV imaging system mounted on the treatment machine provides high-resolution X-ray images of the targeted area just before each daily treatment.