Proteus 235, Proton Therapy System a medical device designed to produce and delivers a proton beam for the treatment of patients with localized tumors and other conditions susceptible to treatment by radiation.
There is a risk of misalignment of the patient when using treatment plans with multiple isocenters.
Nationally
https://www.accessdata.fda.gov/scripts/ires/index.cfm?Product=Z-0938-2018