Mevion Medical Systems recently announced that the S250 device has been in clinical operation for one year since treating its first patient.  The milestone was reached at Mevion’s first installation at the S. Lee Kling Proton Therapy Center at Barnes-Jewish Hospital in St. Louis, Missouri, which treats over 20 adult and pediatric patients a day with 97% uptime.  To commemorate this important milestone, Massachusetts Governor Deval Patrick dedicated the day as Proton Therapy Day.

The Mevion S250, with design and GUI developed by PI, has five additional locations currently under construction across the country, including New Jersey, Oklahoma, Florida and Ohio.  A fifth location announced in November will be constructed in Washington D.C. and is currently in architectural planning stages.