Mevion has chosen to provide proton therapy technology to the Froedtert & Medical College of Wisconsin Health Network

This is expected to be the first clinical proton therapy system in Wisconsin

LITTLETON, Mass., October 25, 2022–(BUSINESS WIRE)–Mevion Medical Systems is pleased to announce that it has contracted with healthcare network Froedtert & the Medical College of Wisconsin to bring the MEVION S250i Proton Therapy System® to Wisconsin.

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A custom vault will house the proton therapy system at Froedtert & the Medical College of Wisconsin Clinical Cancer Center on the Froedtert Hospital campus in Milwaukee, Wisconsin (Photo: Business Wire)

The system will be installed at the Froedtert & MCW Clinical Cancer Center on the Froedtert Hospital campus. Construction is slated to begin in early 2023, with first patient treatment expected in 2024, potentially making the Froedtert & MCW healthcare network the first healthcare system to offer proton therapy in Wisconsin.

Earlier this year, healthcare network Froedtert & MCW announced a partnership with Legion HealthCare Partners that will assist in the feasibility, design and construction, and successful implementation and management of the complex proton therapy operations of the proton therapy system.

Through its Cancer Network, the Froedtert & MCW healthcare network will offer treatment with the MEVION S250i system to adults and will work with Children’s Wisconsin, one of the country’s leading pediatric facilities, to treat pediatric patients with proton therapy.

The Cancer Network offers six campuses connected to the unparalleled resources of eastern Wisconsin’s only academic medical center on the Froedtert Hospital campus. Renowned cancer specialists and researchers have disease-specific expertise and find innovative ways to make treatment personalized and effective. The Cancer Network also offers the largest cancer clinical trial treatment program in Wisconsin.

Proton therapy is an advanced form of radiation therapy that better targets radiation doses to cancer cells without harming healthy tissue. Protons are aimed precisely at the tumor where the beam stops, rather than continuing through the patient as with conventional radiation. This approach helps prevent complications and secondary cancer and can be used in patients who have previously received radiation therapy. The technology will include HYPERSCAN® Pencil Beam Scanning (PBS) technology coupled with Adaptive Aperture®, the industry’s only proton multi-leaf collimator. This powerful duo enhances the benefits of proton therapy with more precise and conformal dose delivery to the tumor. The system will also include an integrated dual-energy diagnostic CT scanner for high-precision image guidance and adaptive proton delivery.

“Proton therapy supports our ongoing commitment to developing and delivering best-in-class, innovative treatments for radiation therapy. We will be offering them to patients from different communities throughout Wisconsin,” said Christopher Schultz, MD, FACR, MCW Professor and Chair of the Department of Radiation Oncology. “Our mission remains focused on expanding access to academic medicine with the goal of expanding the availability of precision treatment options. With Mevion’s advanced technology, we will be able to offer this level of care to more patients when they need it.”

“We are excited to partner with healthcare network Froedtert & the Medical College of Wisconsin to bring proton therapy to Wisconsin,” said Tina Yu, PhD, Mevion’s chief executive officer and president. “We are committed to making proton therapy accessible and are proud that our MEVION S250i is enabling more and more centers to offer their patients this advanced cancer treatment close to home.”

About Mevion Medical Systems

Mevion Medical Systems has been the leading provider of compact proton therapy systems for cancer treatment since 2004. Committed to advancing the design and accessibility of proton therapy worldwide, Mevion pioneered the one-room platform and continues to advance the science and application of proton therapy. Mevion’s product line, including the flagship MEVION S250i and MEVION S250-FIT* with HYPERSCAN Pencil Beam Scanning, represents the world’s smallest proton therapy systems, removing the barriers of size, complexity and cost associated with other proton therapy systems. Mevion is headquartered in Littleton, Massachusetts and has offices in Europe and Asia. Visit for more information.

*The MEVION S250-FIT proton therapy system is not yet available for clinical use

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About the health network Froedtert & MCW

The Froedtert & the Medical College of Wisconsin Regional Health Network is a partnership between Froedtert Health and the Medical College of Wisconsin that supports a shared mission of patient care, innovation, medical research and education. Our healthcare network operates the only academic medical center and Level I Adult Trauma Center in eastern Wisconsin at Froedtert Hospital, Milwaukee, an internationally recognized education and research center involved in thousands of clinical trials and studies. Froedtert & MCW’s healthcare network, which includes nine hospital sites, more than 2,000 physicians and more than 45 health centers and clinics, attracts patients from across the Midwest and across the country. In our last financial year, there were almost 1.5 million outpatient visits, 55,085 inpatient admissions in our hospitals and over 1.1 million visits to our network doctors. Find out more about the health network Froedtert & MCW.

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Jingyi Wang
Mevion medical systems
[email protected]

Gerry Steele
Frödtert Health Media Relations
[email protected]


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