--- title: Halcyon Planning Advanced with EZFluence | Radformation description: EZFluence makes 3D planning easy for clinics with Varian’s Halcyon. image: https://blog.radformation.com/hubfs/halcyon.png --- [![Radformation](https://blog.radformation.com/hubfs/radformation-logo%20WHITE%20BACKGROUND.jpg)](https://radformation.com/) - Products   ### [![](https://blog.radformation.com/hubfs/prod-act.svg) AutoContour Automated AI Contouring](https://radformation.com/autocontour/autocontour) ### [![](https://blog.radformation.com/hubfs/prod-ezf.svg) EZFluence Automated 3D Planning](https://radformation.com/ezfluence/ezfluence) ### [![](https://blog.radformation.com/hubfs/prod-cch.svg) ClearCheck Automated Plan Evaluation](https://radformation.com/clearcheck/clearcheck) ### [![](https://blog.radformation.com/hubfs/prod-crt.svg) ChartCheck Automated Treatment Eval](https://radformation.com/chartcheck/chartcheck) ### [![](https://blog.radformation.com/hubfs/prod-op.svg) OptiPlan Automated VMAT Planning](https://radformation.com/optiplan/optiplan) ### [![](https://blog.radformation.com/hubfs/prod-cca.svg) ClearCalc Independent Calc Software](https://radformation.com/clearcalc/clearcalc) ### [![ChartCheck_Adaptive_Logomark](https://blog.radformation.com/hubfs/ChartCheck_Adaptive_Logomark.svg) ChartCheck Adaptive Automated Adaptive Assessment](https://radformation.com/chartcheck/adaptive) ### [![](https://blog.radformation.com/hubfs/rmc.svg) RadMonteCarlo Independent Monte Carlo](https://radformation.com/radmontecarlo/radmontecarlo) ### [![](https://blog.radformation.com/hubfs/prod-rdt.svg) RadMachine Comprehensive Machine QA](https://radformation.com/radmachine/radmachine) ### [![](https://blog.radformation.com/hubfs/prod-qck.svg) QuickCode Automated Billing QA](https://radformation.com/quickcode/quickcode) - Resources   ### [Blog](https://blog.radformation.com) ### [BED Calculator](https://radformation.com/tools/bed-calculator) ### [Case studies](https://resources.radformation.com/case-studies?hsLang=en) ### [Decay Calculator](https://radformation.com/tools/decay-calculator) ### [Webinars](https://resources.radformation.com/webinars?hsLang=en) ### [Interpolation Calculator](https://radformation.com/tools/interpolation-calculator) ### [White papers](https://resources.radformation.com/white-papers?hsLang=en) ### [Videos](https://resources.radformation.com/videos?hsLang=en) ### [User of the Month](https://resources.radformation.com/user-of-the-month?hsLang=en) ### [Surveys](https://radformation.com/surveys) - Company   ### [About us](https://radformation.com/about) ### [Careers](https://radformation.com/careers) ### [Events](https://events.radformation.com/?hsLang=en) ### [Sales](https://radformation.com/contact/sales) ### [Support](https://radformation.com/success-support) ### [Research](https://info.radformation.com/research?hsLang=en) ### [Press](https://radformation.com/press) - [Contact](https://radformation.com/contact) [![  Sign in](https://no-cache.hubspot.com/cta/default/21696034/b0649c05-e1f9-4050-baf3-050bc98a9a8f.png)](https://cta-redirect.hubspot.com/cta/redirect/21696034/b0649c05-e1f9-4050-baf3-050bc98a9a8f) Company & Product # Halcyon Planning Advanced with EZFluence EZFluence makes 3D planning easy for clinics with Varian’s Halcyon. Written by  [Radformation](https://blog.radformation.com/author/radformation)  on  Jun 25, 2019 --- Varian’s Halcyon is a 6 MV single-energy linear accelerator with a flattening filter free (FFF) beam. Halcyon has built-in imaging and a 100 cm bore to quickly deliver coplanar VMAT and IMRT plans. The Halycon machine is unique in that it does not have jaws but instead two layers of offset MLCs. ![](https://blog.radformation.com/hubfs/Imported_Blog_Media/halcyon_lineac.jpg) *via [www.varian.com](https://www.varian.com/)*   While the FFF beam leads to faster treatments for IMRT, 3D plans are traditionally planned using the field-in-field (FiF) technique on a flat beam of a C-arm linac. Varian has addressed this concern with a dynamic beam flattening (DBF) technique to flatten the FFF beam with the upper MLCs. While this makes FiF possible, the time and MUs needed increases substantially to deliver a comparable plan on a c-arm linac. The alternative to FiF planning is the electronic compensator or the irregular surface compensator. While manual fluence editing can be time-consuming, EZFluence offers an automated approach. EZFluence is an Eclipse TPS plugin that generates the optimal fluences based on the patient’s anatomy and fields provided. EZFluence is compatible with the Halcyon system and can generate 3D plans in seconds. Also, EZFluence will preserve blocks and generate fluence for the flash region all while not needing any manual fluence editing. In addition, EZFluence aims to deliver the most homogenous plan possible. Even though the Halycon only offers the one energy of 6 MV, clinics are still able to generate homogenous plans where they would normally add high energy beams. ![](https://blog.radformation.com/hubfs/Imported_Blog_Media/ezfluence_halcyon.png) **Resources:** 1. [Introducing Halcyon: An Innovative Treatment Platform](https://www.varian.com/oncology/events-resources/centerline/introducing-halcyon-innovative-treatment-platform) 2. [Whole Breast and Lymph Node Irradiation using Halcyon™ 2.0 Utilizing Automatic Multi-isocenter Treatment Delivery and Daily Kilovoltage Cone-beam Computed Tomography](https://www.cureus.com/articles/19832-whole-breast-and-lymph-node-irradiation-using-halcyon-20-utilizing-automatic-multi-isocenter-treatment-delivery-and-daily-kilovoltage-cone-beam-computed-tomography) 3. [Whole Breast Irradiation with Halcyon™ 2.0: Workflow and Efficiency of Field-in-Field Treatment with Dynamic Beam Flattening Technique and kV Cone Beam Computed Tomography](https://www.cureus.com/articles/15498-whole-breast-irradiation-with-halcyon-20-workflow-and-efficiency-of-field-in-field-treatment-with-dynamic-beam-flattening-technique-and-kv-cone-beam-computed-tomography) 4. [Flattening filter free in intensity‐modulated radiotherapy (IMRT) – Theoretical modeling with delivery efficiency analysis](https://aapm.onlinelibrary.wiley.com/doi/full/10.1002/mp.13267)     ![Radformation](https://blog.radformation.com/hubfs/rad-author.png) #### Written by [Radformation](https://blog.radformation.com/author/radformation) Automation software that enables cancer clinics to do more in less time. Transform your department with increased plan quality, safety, and efficiency. Related tags:    [Company & Product](https://blog.radformation.com/tag/company-product) #### Leave a comment ### Related posts Company & Product ### [Automated 3D Planning: Introducing EZFluence 2.0](https://blog.radformation.com/automated-3d-planning-introducing-ezfluence-2-0?hsLang=en) EZFluence 2.0: Fully automated 3D planning for any treatment site. [Radformation](https://blog.radformation.com/author/radformation) May 1, 2019 Company & Product ### [EZFluence Automates Planning for Patients with Aeroform Tissue Expander](https://blog.radformation.com/ezfluence-automates-planning-for-patients-with-aeroform-tissue-expander?hsLang=en) EZFluence Brings Automation to Clinics Offering Aeroform Tissue Expander. [Radformation](https://blog.radformation.com/author/radformation) Apr 10, 2019 Automation ### [How Vendor Neutrality Empowers Radiation Oncology Clinics with Greater Flexibility](https://blog.radformation.com/vendor-neutral-radiation-planning?hsLang=en) As cancer care becomes more complex and multi-system environments grow more common, radiation oncology clinics need tools that are flexible,... 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