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RPS Base
6DoF Robotic Couch for Image Guided Radiotherapy

The RPS Base delivers robotic 6DoF positioning for advanced radiotherapy workflows. It achieves submillimeter correction in pitch, roll, and yaw for precise targeting in stereotactic and image-guided treatments. While being LINAC system agnostic, it can be customized for the OEM to enable faster setup, higher accuracy and full integration into next-generation radiotherapy platforms.

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250 kg

Patient weight

6 DoF

Isocentric movement

+/-5°

Angle correction

640 mm

Low patient entrance

Why Precision Fails in patient positioning

Accurate targeting defines success in radiation therapy. Yet even submillimeter deviations in positioning can alter the radiation path and compromise treatment outcomes. The following challenges show why fixation alone cannot guarantee precision.

Angular Deviations

Even minimal rotational shifts in pitch, roll, or yaw can displace the treatment isocenter by several millimeters. This reduces dose conformity and compromises tumor targeting accuracy particularly in hypofractionated and stereotactic radiotherapy.

Intrafraction Motion

Patient relaxation, anatomic changes or mask inherent tolerances can introduce subtle movements that remain undetected. These micro-motions alter the beam path and affect dose delivery to critical structures near the tumor.

Limited Post-Fixation Adjustment

Once the thermoplastic mask is fixed, most immobilization systems cannot correct angular errors. This limits precision in adaptive or image-guided workflows, especially when CBCT imaging reveals small misalignments.

Reproducibility Between Fractions

Even with identical mask setups, geometric variation occurs across treatment sessions. Without integrated motion correction, these inconsistencies reduce reproducibility and complicate dose planning for fractionated or stereotactic protocols.

Advantages and Benefits

The RPS Base overcomes these issues with integrated robotic correction of up to +/- 5 ° across all axes, performed directly under the LINAC. This enables real-time isocenter alignment, reduces repositioning, and preserves accuracy throughout every treatment session.

  • Smart control interface for intuitive workflow integration
  • Rotational correction up to +/- 5 ° across all axes for precise alignment
  • LINAC vendor agnostic and compatible with any imaging systems
  • Low entry height and stable mechanics for patient comfort and safety
  • API-ready architecture for OEM integration and digital control systems
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How You Benefit

Expanded correction range

Enables +/- 5 ° rotational correction on all axes - even while the patient is immobilized - to support advanced stereotactic and image-guided radiotherapy protocols for submillimeter accuracy.

OEM manufacturing expertise

gKteso is a trusted development partner for LINAC system manufacturers, delivering modular, production-ready 6DoF patient tables tailored for high-end cancer therapy solutions.

Reliable patient positioning

Designed for seamless integration into modern LINAC workflows, the RPS Base enhances targeting precision and supports reproducibility across high-complexity indications for uncompromised treatment delivery.








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    Get in Touch
    Upgrade Your Treatment Platform with 6DoF Precision

    Contact us to learn how to integrate the RPS Base for submillimeter correction and real-time isocenter alignment in any radiotherapy treatment system.

    • Corrects rotational deviations up to +/- 5 ° per axis
    • Compatible with image-guided radiotherapy systems
    • Ideal for stereotactic protocols and motion-sensitive treatments

    +49 8234 966 38 41

    info@gkteso.com

    Seamless Integration
    into LINAC-Based Radiotherapy Workflows

    The RPS Base integrates effortlessly into modern radiotherapy environments and connects directly with major LINAC systems. Compatible with standard carbon baseplates and immobilization devices from Orfit, CQ Medical, 3C, IT-V, and Macromedics, it supports existing clinical setups without modification. Its rigid, low-profile construction ensures stable performance and easy daily operation.

    Fully MDR-compliant and ISO 13485 certified, the RPS Base fits seamlessly into image-guided and stereotactic radiotherapy workflows, including CBCT, 4D, and adaptive protocols. It supports submillimeter reproducibility and real-time correction in cranial and head-and-neck applications, making it the ideal platform for clinics and OEMs aiming to upgrade precision without redesigning their system architecture.

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    Our Applications
    for Advanced Radiotherapy

    High-precision imaging is essential in stereotactic and image-guided brain radiotherapy to ensure accurate dose delivery and protect surrounding tissue. Large Linac vendor Systems  benefit from the RPS Base’s integrated 6DoF motion control, enabling submillimeter positioning and real-time isocenter correction directly at the treatment table.

    • Robotic correction up to +/- 5 ° in pitch, roll, and yaw
    • Seamless integration with CBCT and LINAC-based imaging systems
    • Consistent isocenter geometry across all treatment fractions

    Stereotactic radiotherapy

    Radiotherapy mask

    Surface guided Radiotherapy

    Brain radiotherapy

    Penumbra in Radiotherapy

    Fractionated radiotherapy

    6DoF correction – made for all radiotherapy cases

    With +/- 5 ° angular correction per axis, RPS Base is the precision foundation for IGRT. Compatible with all major immobilization systems and optimized for adaptive workflows.

    • High-precision 6DoF table 
    • Allows for online-adaptive SGRT, SBRT, SRS for 
    • Ideal for correcting setup & motion errors
    • Designed for use with thermoplastic mask systems
    • Improves outcome in brain and hypo-fractionated radiotherapy
    • Reduces penumbra and increases reproducibility
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    Learn more about our patient positioning solutions for OEM partners

    Discover how gKteso’s positioning solutions are applied in advanced radiotherapy systems worldwide. From prototype integration to clinical implementation, our projects demonstrate precision engineering in real treatment environments. Learn how we collaborate with OEM partners to shape the next generation of radiotherapy technology.

    Read in our blog

    Learn more about …

    Real-time 6DoF positioning for LINAC RT workflows.

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    Patient Positioning Systems

    by gKteso: Tailored for modern radiotherapy environments.

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    Seamless surface scanner integration and live motion correction during treatment.

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    Schedule an appointment now!

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    Frequently Asked Questions

    Which 6DoF robotic couches offer an open interface for seamless OEM LINAC and digital workflow integration?
    Many conventional patient positioning systems operate on closed, proprietary networks, making third-party hardware synchronization a major bottleneck for system developers. The RPS Base addresses this challenge with its completely API-ready architecture, specifically engineered for smooth OEM integration and unified digital control systems. This open interface allows gKteso to quickly adapt to LINAC manufacturers core software directly to the table’s motion logic, facilitating real-time data exchange and removing proprietary software barriers.
    Yes, clinical adaptability is a core feature of the system’s mechanical design. The RPS Base comes equipped with a smart, universal connecting plate that ensures full compatibility with industry-standard immobilization devices and indexing systems from leading manufacturers like Orfit, CQ Medical, 3C, IT-V, and Macromedics. This allows clinics and OEMs to upgrade their mechanical precision to six degrees of freedom without forcing customers to replace their entire legacy inventory of thermoplastic masks or vacuum bags.
    Modern adaptive workflows require immediate, high-precision geometric corrections the moment imaging systems detect a misalignment. The RPS Base acts as the precision foundation for these protocols by delivering full 6DoF movement with a +/- 5° angular correction range across all axes. Even after a patient is fully immobilized in a thermoplastic mask setup, the robotic table can execute submillimeter translational and rotational adjustments directly at the treatment beamline.
    Absolutely, as we leverage over 30 years of specialized MedTech engineering experience to focus heavily on customized solutions for independent system integrators and university spin-offs. Rather than forcing a standard model into a unique machine environment, we work as a collaborative development partner to tailor the physical dimensions, mounting plates, and electronic configurations to your specific requirements. This bespoke engineering approach covers everything from the initial CAD concept to fully validated, production-ready hardware, ensuring optimal performance without structural constraints.
    The RPS Base is manufactured under a strict ISO 13485 certified quality management system and is fully compliant with the EU Medical Device Regulation (MDR 2017/745). Structurally, it features a rigid, low-profile mechanical design that easily supports a high patient weight capacity of up to 250 kg while maintaining an accessible 640 mm low entry height. This comprehensive compliance and robust build quality allow OEM partners to satisfy rigorous clinical audits efficiently and accelerate their overall system’s time-to-market.
    The RPS Base is highly optimized for complex radiation oncology workflows, particularly stereotactic radiotherapy (SRS/SBRT) and online-adaptive protocols. Its precise 6DoF motion control makes it the ideal foundation for treating high-complexity indications such as brain, head-and-neck, thoracic, and pelvic fields. By providing real-time isocenter alignment directly at the treatment table, it ensures exceptional targeting accuracy near critical anatomical structures.
    The platform features an exceptionally stable mechanical structure with a 640 mm low patient entrance height, which significantly improves accessibility and safety for elderly or immobilized patients. During the daily clinical workflow, its smart control interface enables intuitive operation and streamlined positioning routines. Furthermore, the ability to correct rotational deviations up to ±5° per axis directly under the LINAC reduces time-consuming manual repositioning and maximizes daily patient throughput.
    Yes, the RPS Base is explicitly engineered to be completely LINAC vendor agnostic and fully compatible with modern imaging architectures. It integrates seamlessly with standard clinical verification systems, including Cone Beam CT (CBCT), 4D tracking, and surface-guided radiotherapy (SGRT) platforms. This open hardware compatibility allows OEMs to bundle the couch into diverse system configurations without experiencing mechanical or software mismatches.

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