July 5, 2018 — MedStar Georgetown University Hospital in Washington D.C., has begun patient treatments using the RayStation treatment planning system in combination with Mevion’s Hyperscan pencil beam scanning system. This was the world’s first treatment carried out on the Mevion S250i Proton Therapy System, according to Mevion.
The combination of RayStation and Mevion’s Hyperscan technology enables clinicians at MedStar Georgetown to plan and treat patients with the advantage of very sharp field edges and minimized radiation to critical structures.
RayStation enables the use of advanced intensity modulated proton therapy (IMPT) capabilities that are unique to the Hyperscan technology. These capabilities include multi-leaf collimation with Mevion’s Adaptive Aperture, a proton multi-leaf collimator (pMLC) designed to achieve sharp lateral dose gradients and protect sensitive organs at every energy layer of the treatment.
For more information: www.raysearchlabs.com
April 10, 2026 
