Author: Eichin, M.
Paper Title Page
TUC3O04 Reusable Patient Safety System Framework for the Proton Therapy Centre at PSI 1
  • P. Fernandez Carmona, M. Eichin, M. Grossmann, A. Mayor, H.A. Regele
    PSI, Villigen, Switzerland
  • E. Johansen
    PSI, Villigen, Villigen, Switzerland
  A new gantry for cancer treatment is being installed at the Proton Therapy Centre in the Paul Scherrer Institut (PSI), where already two gantries and a fixed line operate. A protection system is required to ensure the safety of patients, requiring stricter redundancy, verification and quality assurance (QA) measures than other accelerators. It supervises the Therapy System, sensors, monitors and operator interface and can actuate magnets and beam blockers. We built a reusable framework to increase the maintainability of the system using the commercial IFC1210 VME controller, developed for other PSI facilities. It features a FPGA implementing all the safety logic and two processors, one dedicated to debugging and the other to integrating in the facility's EPICS environment. The framework permitted us to reduce the design and test time by an estimated 40% thanks to a modular approach. It will also allow a future renovation of other areas with minimum effort. Additionally it provides built-in diagnostics such as time measurement statistics, interlock analysis and internal visibility. The automation of several tasks reduces the burden of QA in an environment with tight time constraints.  
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