Elekta Infinity™ &
Stereotactic Body Radiation Therapy

Saint Barnabas Medical Center Radiation Oncology Department recently acquired the new Elekta Infinity™ a highly advanced radiation treatment system. Elekta Infinity is a highly advanced digital linear accelerator that reduces the time required for radiotherapy sessions, while giving clinicians the ability to treat targets more aggressively than ever before. Elekta Agility is the next-generation high-resolution beam shaping solution which allows for intelligent treatment planning. Utilizing 160 interdigitating leaves with optical leaf positioning allows for high resolution beam design and seamless treatment delivery.

Elekta Infinity offers a comprehensive treatment system that includes Volumetric Modulated Arc Therapy (VMAT). With Elekta VMAT, single or multiple radiation beams travel in uninterrupted arc(s) around the patient, dramatically decreasing treatment times while improving tumor targeting. The Elekta Infinity system incorporating the Agility beam shaping technology is being used to treat lung, pancreas and liver cancers and metastases to the spine with Stereotactic Body Radiation Therapy (SBRT) and for specific disease sites, disease free survival is comparable to the outcomes with invasive surgery.

What Is Stereotactic Body Radiation Therapy?

Stereotactic Body Radiation Therapy (SBRT) localizes radiation to a very limited area with a very high level of precision. It involves the delivery of one to five radiation treatments and utilizes a very potent biological dose of radiation delivered to the tumor, improving the cure rates while minimizing toxicity. This highly specialized form of radiation involves the use of multiple beam angles to safely deliver high doses of radiation to the tumor while minimizing dose to healthy surrounding tissues.

Who Is Eligible?

Patients with early stage lung cancers, typically five centimeters or less, who are unable to have surgery are excellent candidates for treatment with SBRT. SBRT has been shown to be highly effective in curing patients of early stage lung cancer, while minimizing toxicity and allowing patients to maintain an excellent quality of life. Treatments are typically completed in three to five sessions. The benefits of SBRT have also been studied in patients whose cancers have spread to their livers and or spine.

How Is It Performed?

SBRT requires accurate and personalized treatment planning for each individual patient's anatomy and tumor location. SBRT treatment planning is used in conjunction with a 4-dimensional CT simulation. The 4-D CT simulator allows for assessment of organ and respiratory motion and accounts for patients' breathing and movement. This motion is accounted for during SBRT treatment planning to allow for extremely precise targeting and improved accuracy. Treatment is completed in typically three to five sessions over a 1-2 week period.

Elekta Infinity and Stereotactic Radiosurgery (SRS)

Stereotactic Radiosurgery (SRS) is a non-invasive form of radiation therapy used to treat malignant or benign tumors. SRS utilizes high doses of radiation to precisely target specific areas with minimal exposure to surrounding healthy tissues. Due to its precision and minimal inclusion of healthy tissues, it is useful for tumors that are located in sensitive locations such as the brain and spinal cord.