October 22, 2018 LITTLETON, Mass.--(BUSINESS WIRE)--Mevion Medical System announces that construction is underway for a second proton therapy system at Siteman Cancer Center at Barnes-Jewish Hospital and Washington University School of Medicine in St. Louis. This new vault will be equipped with the MEVION S250i Proton Therapy System™ with HYPERSCAN Pencil Beam Scanning (PBS)™ technology.

“We are extremely proud to be selected to provide a second system to Siteman Cancer Center,” said Tina Yu, Ph.D., chief executive officer of Mevion Medical Systems. “We see this as a reflection of the dedication and hard work of our team to provide the best possible solutions to cancer centers and patients. At Mevion we pride ourselves on bringing innovative new solutions to make proton therapy a reality for more patients, and that is what we are doing here at Siteman.”

In 2013, Siteman Cancer Center became the first in the world to treat a patient with a Mevion compact proton therapy system. Siteman treats adult cancer patients with proton therapy, as well as pediatric cancer patients from St. Louis Children’s Hospital, also located on the Washington University Medical Campus. Last year, Siteman celebrated the treatment of its 500th proton therapy patient.
Since then, the S. Lee Kling Proton Therapy Center has grown and is now expanding with a second Mevion system located directly next to the first. This will be the first cancer center with two Mevion systems. Several other sites are following this approach, having planned a second room at the time of the first to accommodate expansion as needed.

The new system will be equipped with Mevion’s HYPERSCAN Pencil Beam Scanning technology. This technology improves on older scanning technologies particularly due to Mevion’s Adaptive Aperture, a novel proton multi-leaf collimator (pMLC), which gives clinicians the most conformal treatments. Additionally, Siteman Cancer Center is leveraging the open platform capabilities of the Mevion system to incorporate the latest imaging modalities. Siteman will be equipping its room with both a ceiling rail mounted cone beam CT system and diagnostic CT on rails system for advanced treatment modalities.

“We envision that the second proton therapy system will enable us to more precisely treat cancers located near critical structures, such as the brain tumors near the eyes and optic structures, spinal cord or the heart,” said Dr. Jeffrey Bradley, “That’s because this advanced form of proton therapy technology is based on pencil-beam scanning, in which a single, narrow proton beam is aimed directly at the tumor and adjusted for intensity. Such precision helps spare surrounding healthy tissues and reduce the risk of treatment-related complications.”

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