Erasmus MC Completes First Step in the Evolution of Online Adaptive Radiation Therapy With the CyberKnife® System

Accuray Incorporated (NASDAQ: ARAY) and Erasmus MC, the largest university medical center in the Netherlands, announced today that the first patient has been successfully treated using an online-adaptive (OA) approach together with the CyberKnife® System. The patient, treated for oligometastases in the pelvic region, is part of a new clinical trial conducted at Erasmus MC evaluating OA stereotactic body radiation therapy (SBRT) delivered by the CyberKnife platform. The trial brings the hospital one step closer to its goal of providing individual, personalized medicine.

J.J. Nuyttens, MD, PhD, radiation oncologist, department of radiation oncology, Erasmus MC said, “At Erasmus MC our goal is to use innovative approaches to provide customized, effective treatments that help extend or improve the quality of life of people diagnosed with cancer, regardless of the stage of their cancer diagnosis.” He added, “We initiated this trial because we want to improve local cancer control and minimize toxicities in people with pelvic or intra-abdominal oligometastases.”

Oligometastastic disease occurs when cancer cells from the primary tumor travel to other parts of the body and form a small number (less than six) of lesions. The cancerous cells are in an intermediate state; they are no longer confined to their initial location nor have they spread widely throughout the body. Radiation treatment of oligometastatic disease in the pelvic or intra-abdominal area is challenging because of the close proximity of healthy organs very sensitive to radiation. From one day to the next there can be a significant variation in the position of these organs and it can be difficult to account for the changes in their location on a daily basis.

To address this issue, Accuray and Erasmus MC are partnering to develop an integrated, advanced, imaging solution tailored for use with the CyberKnife System. The purpose is to enable clinicians to adapt the treatment plan to daily anatomical changes within the patient. According to Dr. Nuyttens, “This OA-SBRT strategy provided the treated patient with an optimal combination of dose to the tumor and sparing of the surrounding healthy organs.”

“We are thrilled to have the opportunity to collaborate with Erasmus MC on the first step of a longer-term CyberKnife initiative to enhance the quality of care clinicians can offer to their patients,” said Fabienne Hirigoyenberry-Lanson, PhD, Vice President Global Medical and Scientific Affairs at Accuray. “We believe a system that provides clinicians with the ability to tailor the treatment on a daily basis through a fully automated solution, and track and automatically correct for tumor or patient movement throughout the treatment, has the potential to create a paradigm shift in the way radiation is delivered and in cancer care.”

Details of the Study:  This study is a non-randomized single arm phase II clinical trial evaluating the use of OA-SBRT for the treatment of oligometastatic disease in the pelvic or paraaortic region. In total, 53 patients will be enrolled and will be followed for three years. A prescription dose of 45 Gy will be delivered in five fractions by the CyberKnife System. The primary study objectives are to evaluate local control, survival and toxicity.

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