The latest version of Eclipse is now available!

Eclipse treatment planning system v18.1† delivers on innovation to reshape treatment planning workflows and techniques. With the introduction of the RapidArc Dynamic solution, enhanced imaging capabilities, advanced automation, and a streamlined plan review process, Eclipse v18.1 is engineered to set new standards in radiation therapy.

Connection

Seamlessly connecting disparate processes into one workflow

  • Leverage the latest advances in imaging, treatment planning and delivery – in one place
  • Foster more harmonious and flexible peer-to-peer collaboration with RT Peer Review
  • Share best practices and contribute to the community with RapidPlan knowledge-based planning
  • Combine AI contouring with automated workflows using AI-Rad Companion Organs RT*
  • Simplify coordination of data and user rights between departments or institutions

Control

Control to drive personalized patient care, more efficiently

  • Leverage the benefits of IMRT, VMAT and a dynamic collimator with RapidArc Dynamic
  • Generate high-quality treatment plans, consistently, with RapidPlan
  • Explore possibilities and refine results with multi-criteria optimization (MCO)
  • Intuitively sculpt dose using MCO isodose line dragging
  • Easily control hot/cold spots with local dose correction
  • Tailor automated workflows with the Eclipse Scripting API (ESAPI)

Confidence

Empowering you to plan with confidence

  • Reach your clinical goals, faster, with RapidArc Dynamic
  • SRS using a single isocenter with HyperArc high-definition radiotherapy
  • Simplify complex SBRT treatment planning with SBRT NTO
  • Customize and streamline plan checks to meet institutional criteria with Plan Checker
  • Experience a new level of precision with enhanced leaf modeling (ELM)

AI Contouring — Embedded in Eclipse

High-quality, deep learning-driven structure delineation directly within your treatment planning workflow.

  • Automatically generates contours from CT and MRI images for over 200 anatomical structures — including organs-at-risk, lymph nodes, and brain metastases
  • Built on multiple clinical guidelines (RTOG, ESTRO, DAHANCA, and more) for consistent, evidence-based results
  • Seamlessly integrated within Eclipse, with no additional hardware, no separate platform, and single‑vendor support
  • Validated by leading institutions1,2 worldwide, with auto contouring results on par with expert physicians

Resources

Complimenting Eclipse

Treatment Delivery

Halcyon

Improve patient comfort and workflow with the Halcyon radiotherapy system. Fast, efficient, and patient-centered for modern cancer treatment.

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Halcyon

TrueBeam

Deliver precise radiation dosage quickly with the TrueBeam radiotherapy system. Built with human needs in mind for advanced cancer care and high-precision treatment.

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TrueBeam

We’ll help you get connected

Our specialists can help you integrate Varian into your workflow.

If you are a current customer and need product support, please visit our Customer Support page

†CE Marked. 510(k) pending. Not available for sale in the U.S. or all markets and no guarantee of commercialization or feature availability.

*AI-Rad Companion Organs RT is a Siemens Healthineers product and a registered trademark of Siemens Healthineers in some countries.

  1. Putz, F. Is AI-powered tumor autocontouring ready for clinical use? Evaluation of Siemens Healthineers research prototype for the autosegmentation of brain metastases. Poster presented at DEGRO; Jun 2025, Dresden, Germany. Datasets: 101 patients; 391 lesions; 1.5T MRI series T1-SPACE. University of Erlangen-Nuremberg.
  2. Tezcanli, E. Evaluation of a Deep Learning Contouring Algorithm for Target Delineation in HyperArc Radiosurgery. Webinar, Oct 2025. Datasets: 10 patients; 82 lesions. Acibadem University.