A New “Gold Standard” in Radiation Therapy Treatment
Advanced ROS patients gain the TomoTherapy advantage

In June 2005, Advanced ROS will become the first radiation center in the Northeastern U.S. and one of only 30 centers around the world to offer the newest and most precise radiation therapy technology to our patients.

Described as “the first redesign of a radiation oncology linear accelerator in 40 years”, the TomoTherapy® HI-ART System® was developed at the University of Wisconsin and received FDA approval in 2002. TomoTherapy’s unprecedented precision means that treatment is more effectively delivered to the target area and with reduced dose to normal tissues, resulting in significantly reduced side effects.

TomoTherapy has broad applications in the treatment of many forms of cancer, including cancers of the prostate, breast, lung, brain, head and neck, bone and soft tissue, as well as lymphomas and multiple myeloma. It may open up new treatment options for patients who have reached their maximum tolerance dose of traditional radiation, or who have tumors in hard-to-reach areas. To learn if TomoTherapy might be a treatment option for you, call us at (845) 727-0828.

The TomoTherapy Concept

Until now, two machines were required to perform two essential functions of the radiation treatment process -- one machine to provide visual information about the anatomical target area and surrounding tissues (the CT scanner), and another to deliver the radiation (the linear accelerator or linac). TomoTherapy integrates the diagnostic imaging and radiation delivery functions into one process and one machine, which enables a much higher level of treatment precision.

The TomoTherapy® HI-ART System® machine resembles a CT scanner in that the patient lies on a bench that glides through a large revolving ring. But the TomoTherapy machine’s revolving ring houses a new kind of linear accelerator that can both make diagnostic x-ray images and deliver radiation treatment.

Because TomoTherapy linear accelerators can also image internal soft-tissue anatomy, Advanced ROS doctors can now verify the precise position of your tumor and any sensitive organs before treatment, as well as the radiation dose deposited. TomoTherapy® HI-ART System® computers provide treatment planning that is both conformal (targeting tumor structures) and conformal avoidance (sparing sensitive structures). This results in better and safer treatment in general, but particularly for tumors that are close to critical structures, or those that can change shape or shift from day to day.

The TomoTherapy linac produces a spiral-shaped beam of Intensity Modulated Radiation (IMRT). When it rotates around you during treatment, the radiation beam turns on and off rapidly, splitting into hundreds of tiny beams that deliver precise amounts of energy to your unique target area. Standard linear accelerators only deliver radiation from a few fixed directions. Because TomoTherapy’s beams are directed from 360 degrees around a spiral, a much more accurate dose is focused on the tumor and less on surrounding tissues.

Summary of Clinical Advantages

Precise Planning: The TomoTherapy Hi·Art System® uses a treatment planning optimizer, which is easier to use than conventional treatment planning systems.

Precise Positioning: The TomoTherapy Hi·Art System® uses special verification CT to confirm the position of the patient's tumor before each treatment fraction, so the clinician can adjust the plan on the spot to make sure the radiation is directed right where it should be.

Precise Delivery: While conventional radiotherapy delivers a wide beam of radiation from just two or three directions, the TomoTherapy Hi·Art System® combines sophisticated IMRT with spiral delivery. So the desired radiation gets concentrated on the tumor, and less radiation gets deposited on surrounding healthy tissue.

System Integration: The TomoTherapy Hi·Art System® is an all-in-one system that eliminates the need for a simulator, separate treatment planning computers, block cutting and compensator molding facility, and portal imaging systems.

Summary courtesy of Tomotherapy Inc. For detailed information, visit www.tomotherapy.com.

Treatment of head and neck cancer showing sparing of parotid glands with IMRT