LITTLETON, Mass.--(BUSINESS WIRE)--May 11, 2026--
Proton therapy is entering the LINAC vault. At ESTRO 2026, Mevion Medical Systems will introduce the MEVION S250-FIT Proton Therapy System to the European radiation oncology community, the first proton therapy system designed for installation in a standard radiation therapy vault.
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Now both U.S. FDA-cleared and CE-marked under Regulation (EU) 2017/745, the S250-FIT creates a new pathway for cancer centers to bring proton therapy into existing LINAC-based treatment environments, aligning advanced proton capability with the infrastructure, workflows, and capital planning of modern radiation oncology.
Stanford Medicine: First S250-FIT Installation
On April 7, 2026, Stanford Medicine unveiled the world’s first S250-FIT installation, developed in collaboration with Leo Cancer Care. The system was fully installed within a standard 110 m² (1,200 sq ft) LINAC vault inside the existing Stanford Medicine Cancer Center in Palo Alto, without constructing a new building.
“With FIT ™, proton therapy is no longer limited by infrastructure,” said Tina Yu, Ph.D., CEO and President of Mevion Medical Systems. “For the first time, it can be deployed within the same clinical and operational framework as conventional radiotherapy. For European health systems that have long recognized the benefits of proton therapy but faced significant infrastructure and financial barriers, this changes the question from whether to build a separate proton facility to how to integrate proton therapy into the radiotherapy programs they already operate.”
Advanced Capability in a Compact Footprint
The S250-FIT delivers Intensity Modulated Proton Therapy via Mevion's HYPERSCAN® pencil beam scanning with the Adaptive Aperture® proton multi-leaf collimator and is designed to support DirectARC™ proton arc therapy. The system supports advanced image-guided and adaptive workflows and is FLASH research-ready.* The system is paired with Leo Cancer Care’s Marie® Upright Patient Positioning and CT Imaging System, the first commercial upright treatment platform with an integrated diagnostic CT, offering potential benefits in patient comfort and supporting organ motion management during treatment.
Built on Decades of U.S. and European Clinical Experience
The S250-FIT shares its core technology lineage with the MEVION S250i®, in clinical operation at Siteman Cancer Center at Washington University School of Medicine in the U.S. and at ZON-PTC at Maastro Clinic in the Netherlands, giving Mevion more than a decade of combined U.S. and European clinical experience with compact, single-room proton therapy. Mevion has now signed contracts with nine leading institutions globally for the S250-FIT, including Stanford Health Care, Loma Linda University Health, UNC Health, BayCare Health System, Atlantic Health System, and University of Nebraska Medical Center.
Meet Mevion at ESTRO 2026
Visit Mevion at Booth #C08:89 to engage with the Mevion team and discuss site planning, clinical workflows, and integration pathways with our clinical and engineering leadership.
*The FLASH Research Kit is not currently available for commercial sale or for human clinical use.
About Mevion Medical Systems
Mevion Medical Systems is the leading provider of compact proton therapy systems for cancer care. Dedicated to advancing the design and accessibility of proton therapy worldwide, Mevion pioneered the single-room platform and continues to further the science and application of proton therapy. Since 2013, Mevion’s compact proton therapy single-room systems have been used by leading cancer centers for treating patients. Mevion’s series of products, including the flagship MEVION S250i and MEVION S250-FIT™ with HYPERSCAN pencil beam scanning, represent the world’s most compact proton therapy systems that eliminate the obstacles of size, complexity, and cost. Mevion is headquartered in Littleton, Massachusetts, with a presence in Europe and Asia. For more information, please visit www.mevion.com.
The MEVION S250-FIT™ Proton Therapy System
ANAHEIM, Calif. (AP) — Alex Killorn and rookie Beckett Sennecke had a power-play goal and an assist apiece, and the Anaheim Ducks beat the Vegas Golden Knights 4-3 in Game 4 on Sunday night to even their second-round series at two games apiece.
Ian Moore got his first career playoff goal, Cutter Gauthier contributed three assists and Mikael Granlund also scored for the upstart Ducks, who responded to their 6-2 blowout loss in Game 3 with another mature two-way performance in their first playoff run since 2018.
“It's a great rebound, a good, resilient game,” Killorn said. “I think there was a lot more urgency tonight. That's kind of the way playoffs go. You don't ever want to lose two in a row at home. You don't want to go down 3-1 in a series. We made some adjustments. That's just what playoffs is. They had a great game last time. We had a good game tonight, and we expect it to be a really good series going forward.”
Lukas Dostal made 18 saves in a strong bounce-back effort after getting pulled from Game 3 for allowing three goals in his latest shaky first period, and his teammates provided more than enough offense in their highest-scoring performance of the series. The Ducks are tied for the overall Stanley Cup playoff lead with 36 goals and 10 power-play scores.
“I thought we worked hard and did a lot of good things,” Anaheim coach Joel Quenneville said. “A little dangerous at the end again, but certainly a lot of positives.”
Game 5 is Tuesday night in Las Vegas, with Game 6 back in Anaheim on Thursday night.
Pavel Dorofeyev and Brett Howden scored for the Golden Knights, whose three-game road winning streak ended.
Carter Hart stopped 19 shots despite some shaky moments, while Mitch Marner had three assists in Game 4 following his hat trick in Game 3, giving him an NHL-leading and career-best 16 points in the postseason.
Anaheim's two power-play goals ended the unit’s 0-for-11 skid and finally dented a Vegas penalty kill that allowed just one power-play goal in its first nine postseason games. Killorn got the tiebreaking power-play goal late in the second period when he drove the net and his shot trickled through Hart.
“I'm not going to dissect the PK,” Vegas coach John Tortorella said. “I think the biggest part of the game was we needed to get out of the second period (tied) 2-2. That gave them some life, and they scored their fourth goal and they're just filling the neutral zone, just stacking. I think that was the most important part of the game.”
Moore added to the Ducks' early in the third, recording his first career playoff point. Tomas Hertl ended his personal 29-game goal drought when he scored for Vegas with 1:04 left while Hart was pulled for an extra attacker, but Anaheim held on.
Sennecke, the Ducks’ 20-year-old Calder Trophy finalist, opened the scoring with just the second power-play goal allowed by the Golden Knights in the entire postseason, ending a streak of 21 straight kills.
Sennecke scored a goal in his third consecutive game, joining Sidney Crosby (2007) as the only players under 21 with a three-game postseason goal streak in the 21st century.
Howden tied it with his seventh goal of the postseason early in the second period off a slick setup from former Ducks draft pick William Karlsson.
Vegas played without captain Mark Stone, who incurred an undisclosed injury in Game 3.
Anaheim shook up its lineup, inserting puck-moving defenseman Olen Zellweger for his playoff debut and his first game action since April 7 while Moore and forward Mason McTavish also returned after healthy scratches. Quenneville praised all three players' effort.
AP NHL: https://apnews.com/NHL
Vegas Golden Knights' Pavel Dorofeyev (16) celebrates his goal against the Anaheim Ducks during the first period of an NHL hockey game Sunday, May 10, 2026, in Anaheim, Calif. (AP Photo/Scott Strazzante)
Vegas Golden Knights' Jack Eichel (9) is separated from Anaheim Ducks' Jacob Trouba (65) during the second period of an NHL hockey game Sunday, May 10, 2026, in Anaheim, Calif. (AP Photo/Scott Strazzante)
Anaheim Ducks' John Carlson (74) is tripped up by Vegas Golden Knights' Rasmus Andersson (4) during the second period of an NHL hockey game Sunday, May 10, 2026, in Anaheim, Calif. (AP Photo/Scott Strazzante)
Anaheim Ducks' Beckett Sennecke (45) celebrates his goal against the Vegas Golden Knights with Alex Killorn (17) during the first period of an NHL hockey game, Sunday, May 10, 2026, in Anaheim, Calif. (AP Photo/Scott Strazzante)
