Still River Systems is dead, long live Mevion Medical Systems. The Littleton, Mass.-based developer said it changed its name to reflect a shift in corporate focus, as the company is now set to commercialize its proton therapy system.

"Today we feel confident that we can expand our focus from strictly R&D to full product commercialization," Mevion's CEO Joseph Jachinowski said in a statement. "Given this important moment in our history, we think it is appropriate that we mark this transformation with a new name and identity."

Mevion announced the name change to coincide with the Association for Radiation Oncology's annual meeting in Miami last week.
The Mevion S250, previously the Monarch S250, is said to be one of the lightest proton systems around. The superconducting synchrocyclotron fires protons at energies up to 250 MeV, but has a more compact design than other systems on the market, the company said.

Mevion is installing its first commercial unit, which hasn't been cleared by the Food and Drug Administration yet, at a proton therapy center in development at Barnes-Jewish Hospital in St. Louis, Mo.

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