Proton radiotherapy vendor Still River Systems has successfully tested a high-field, high-energy cyclotron magnet.
The superconducting magnet is the foundation for the Littleton, MA, company's particle accelerator-based Monarch250 proton therapy system. The magnet is designed to reduce the size and cost of Monarch250, which is scheduled for installation at Barnes-Jewish Hospital in St. Louis and Robert Wood Johnson University Hospital in New Brunswick, NJ, later this year.
Both hospitals have begun construction on new facilities to house the first Monarch250 systems in the U.S.
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Varian, Still River team up, May 27, 2008
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![A 53-year-old patient (patient number four) with a recurrent pituitary adenoma with extension of a cystic component of disease to the medial temporal lobe apparent on MRI (contoured in blue), and extension of disease to the left sphenoid bone and orbital apex apparent on [68Ga]Ga-DOTA-TATE (contoured in yellow).](https://img.auntminnie.com/mindful/smg/workspaces/default/uploads/2026/04/pituitary-tumor.QGsEnyB4bU.jpg?auto=format%2Ccompress&dpr=2&fit=crop&h=167&q=70&w=250)
