Orlando Health has been using the Mevion S250 to treat patients with proton therapy since April of last year, but this week they announced the first patient treated with the aid of in-room CT guidance.

While proton therapy offers dosimetry benefits over conventional radiation therapy, adding image guidance to the procedure can mean even better targeting of the tumor, and ultimately better patient outcomes.

"In order to take advantage of the very precise dose distributions – you have this great ability to shape dose with protons – you need to make sure you’re targeting correctly," Joe Jachinowski, CEO of Mevion Medical Systems, told HCB News. "That targeting is facilitated by 3 dimensional imaging and 6 degree of freedom positioning, and our feeling is that one of the benefits of proton therapy is that it is amenable to adaptive radiotherapy."
With the addition of Airo — a mobile, diagnostic CT scanner — the radiologists at Orlando Health's Marjorie and Leonard Williams Center for Proton Therapy are integrating advanced 3-D localization with Verity Patient Positioning System, a component of the Mevion S250.

“This is an advancement in how we can precisely position patients for proton therapy compared to conventional planar imaging methods,” said Omar Zeidan, Ph.D., chief of proton therapy physics at Orlando Health, in a statement. “This CT-based IGRT system offers superior stereotactic localization with submillimeter accuracy in addition to the capability for adaptive proton therapy.”

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