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RayStation offers accurate and fast dose calculation service for all linacs commercially available. A dedicated graphical user interface, rayPhysics, is available for photon and electron modeling and allows for evaluation of models as well as treatment planning tools prior to commissioning a machine. In RayStation, you also have a dedicated module to easily perform quality assurance.

High connectivity

RayStation’s physics models are hardware independent and compatible with all linear accelerators commercially available.

RayStation’s data model is fully compatible with the DICOM standard, allowing the system to easily import and export any DICOM RT object. This includes multiple CT, MR and PET image series, 4D-CT, structure sets, doses and RT Plan and RT Ion treatment plans. In addition, RayStation communicates with other data sources such as IHE RO, DICOM senders and receivers or DICOM archives, using either file transfer, DICOM storage service classes or DICOM query/retrieve.

Photon dose calculation/ rayPhotonPhysics

rayPhotonPhysics contains the dose calculation engines for megavoltage photon beams, i.e. conventional Linacs.

It includes the separate workspace rayPhysics with advanced tools for beam modeling, such as partly automated beam modeling tools and the 3D beam modeling workspace wherein machine models and treatment plans can be evaluated for a real patient before being commissioned for clinical treatment.

  • Collapsed cone photon dose calculation engine with clinical accuracy (GPU supported).
  • Singular value decomposition photon dose calculation engine for real-time purposes.
  • Beam commissioning workspace with auto modeling.

"Since we started using RayStation for IMRT planning, not a single plan has ever failed IMRT QA. It was not the case with the planning systems we used before."

Hsiao-Ming Lu

Director of Clinical Physics Massachusetts General Hospital Harvard Medical School.

"Through vigorous testing of the photon dose algorithm in RayStation we found excellent agreement to measured data across four linacs, three head configurations, and two vendors. All data was found to be well within the published guidelines."

Jeremy Donaghue

M.S. Chief Medical Physicist Akron General Health System.

Electron dose calculation/ rayElectronPhysics

rayElectronPhysics contains the dose engine and beam modeling and commissioning workspace for therapeutic electron beams.
  • Electron dose calculation engine uses a state-of-the art direct Monte Carlo code for energy transport in the patient and an in-house beam model to determine the phase space from the treatment unit head, including applicators.
  • Beam commissioning workspace.

"Electron Monte Carlo offers anatomically based treatment planning which accurately accounts for in-patient inhomogeneities with fast dose computation times. The ability to combine and visualise eMC dose distributions with photon-based external beam techniques will facilitate improved plan optimisation in combined therapies and boost techniques."

Bon Mzenda

Ph.D. Chief Physicist Auckland Radiation Oncology.

Proton dose calculation/ rayProtonPhysics

rayProtonPhysics contains the dose engines used for all proton treatment planning, and is the entry point to the different treatment techniques for protons.

rayProtonPhysics contains the dose engines used for all proton treatment planning, and is the entry point to the different treatment techniques for protons.

The algorithm is a Fermi-Eyges-based pencil beam algorithm which can be used within the optimization loop and for final dose calculation.

  • Pencil beam - highly optimized algorithm with 19-fold multi tracing per spot and separate handling of the nuclear halo effect.


"The Provision Center for Proton Therapy was the first proton therapy center to treat patients using the RayStation treatment planning system. The data required by the RayStation pencil beam dose calculation algorithm was measured during three 8 hour beam shifts and was sent to RaySearch to prepare the beam data model for our system. The RayStation system modeled the data near perfectly. We are very happy with the data modeling and the exceptionally good agreement between measured and calculated data for our uniform scanning beam delivery system."

Niek Schreuder

M.Sc. Chief Medical Physicist Provision Center for Proton Therapy.

Quality Assurance

The Quality Assurance preparation module in RayStation allows the user to easily transfer the clinical plan to a phantom and recalculate dose, either beam by beam or for the entire plan.

The output from the module is the dose distribution in DICOM format or a 2D dose plane, a QA report and optionally a new treatment plan with collapsed gantry angles.

Our commissioning results were within 2% at 2mm, well within the industry standard. When I work on beam commissioning in RayStation I remember why we bought it. The results are so beautiful, it makes me happy to be a physicist.

Patricia Sansourekidou

Medical Physicist, Health Quest Radiation Oncology.

Carbon dose calculation/ rayCarbonPhysics*

rayCarbonPhysics contains the dose and radiobiological effect (RBE) computation algorithms used for the carbon ion treatment planning, and is the entry point to the different treatment techniques for carbon ions.

The dose computation algorithm is a Fermi-Eyges-based pencil beam algorithm which can be used within the optimization loop and for final dose calculation. It can be used with or without inclusion of RBE dose weighting.

  • The biological dose algorithm computes RBE weighted dose according to the Local Effect Model. Optionally, RBE weighted dose may be computed with a fast algorithm according to the "low-dose approximation".
  • The code is highly optimized taking longitudinal and lateral heterogeneities into account and with explicit handling of the nuclear halo effect.
  • The machine model supports cyclotrons as well as synchrotron delivery systems (e.g. of the types used at MedAustron/Austria and CNAO/Italy).
  • Executes on GPU or CPU depending on which is the fastest available.
 *Regulatory clearance is needed in some markets

“MedAustron regards itself as an interdisciplinary and nationwide Austrian centre. It will specialize in cancer treatment with ions other than protons, the research and development of this new therapy and non-clinical research with ion and proton irradiation. 

Even amongst other similar centres, MedAustron is an unique project. There nearly is no off-shelf equipment for our specific requirements, concerning neither hard- nor software. One of the biggest challenges is therefore to find suppliers for all the needed equipment, who are able and willing to develop suitable devices according to our specific requirements. 

We chose RayStation because it's the most innovative system available and it's able to fulfill the high demands we make on our dose delivery system. From the first moment on RaySearch showed the flexibility and high competence, alike, necessary for such a demanding partnership.”


Dr. Bernd Mößlacher

Managing Director at Medaustron, Austria.

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