{"entity":{"id":"mevion","kind":"company","name":"Mevion Medical Systems","aka":[],"tldr":"Mevion Medical Systems, of Littleton, Massachusetts, makes the MEVION S250-FIT, a compact single-room proton therapy system meant to bring protons within reach of community cancer centres. Whether smaller, cheaper proton machines widen access without diluting the evidence base is the open question.","summary":"Mevion Medical Systems, based in Littleton, Massachusetts, makes compact single-room proton therapy systems intended to bring protons within reach of community cancer centres. Its MEVION S250-FIT is the current system, and the company's premise is that a single-room machine changes the economics of proton therapy. OnCo links it to proton therapy and proton arc therapy, to the Case Comprehensive Cancer Center, and to ideas such as compact FLASH and proton systems at the price of a conventional linac and pooled coverage-with-evidence for proton therapy across all centres. Whether smaller, cheaper proton systems widen access without diluting the evidence base is the open question. The proton therapy page carries the wider picture.","asOf":"2026-09-04","links":[{"label":"Official website","url":"https://www.mevion.com"}],"tags":[],"related":[],"cancers":[],"sections":["radiation"],"technologies":["proton-therapy"],"targets":[],"drugs":[],"companies":[],"institutions":[],"pathways":[],"terms":[],"trials":[],"people":[],"bottlenecks":[],"keyPapers":[],"journals":[],"dependsOn":[],"notes":[],"hq":"Littleton, MA","country":"US","companyType":"devices","website":"https://www.mevion.com","investors":[],"funding":[]},"route":"/companies/mevion/","neighbours":{"section":[{"id":"radiation","kind":"section","name":"Radiation Therapy","route":"/fronts/radiation/"}],"technology":[{"id":"radiotherapy-equipment-manufacturing","kind":"technology","name":"Linac, proton system and brachytherapy machine manufacturing","route":"/technologies/radiotherapy-equipment-manufacturing/"},{"id":"proton-arc-therapy","kind":"technology","name":"Proton arc therapy","route":"/technologies/proton-arc-therapy/"},{"id":"proton-therapy","kind":"technology","name":"Proton therapy","route":"/technologies/proton-therapy/"},{"id":"proton-therapy-systems","kind":"technology","name":"Proton therapy machines: cyclotrons, synchrotrons and single-room systems","route":"/technologies/proton-therapy-systems/"}],"idea":[{"id":"idea-moon-compact-flash-proton","kind":"idea","name":"Compact FLASH and proton systems at the price of a conventional linac","route":"/ideas/idea-moon-compact-flash-proton/"},{"id":"idea-fund-proton-coverage-with-evidence","kind":"idea","name":"Pooled coverage-with-evidence for proton therapy across all centres","route":"/ideas/idea-fund-proton-coverage-with-evidence/"}],"institution":[{"id":"case-ccc","kind":"institution","name":"Case Comprehensive Cancer Center","route":"/institutions/case-ccc/"}],"roadmap":[{"id":"radiation-roadmap","kind":"roadmap","name":"Radiotherapy roadmap: X-rays → shaped beams → fewer fractions, particles and FLASH","route":"/roadmaps/radiation-roadmap/"}]}}