# Varian (Siemens Healthineers)

Source: https://onco.cc/companies/varian/  
OnCo record `varian` (Company). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)"; commercial use needs a licence.

## TL;DR

Varian is the largest radiotherapy equipment maker and is running the first human FLASH proton trials.

## Summary

Varian, based in Palo Alto and part of Siemens Healthineers, is the largest maker of radiotherapy equipment and is running the first human FLASH proton trials. Its systems include TrueBeam, Halcyon, the Ethos adaptive radiotherapy platform and ProBeam protons, and the FAST-01 and FAST-02 trials are testing FLASH ultra-high dose-rate treatment in patients. OnCo links it to IMRT and IGRT, proton therapy and FLASH radiotherapy, to AI auto-contouring and adaptive planning, to Aarhus University Hospital, and to ideas including a coordinated FLASH evidence programme with shared dose-rate standards and a Gavi-style pooled purchaser for radiotherapy equipment. Surgery and radiotherapy curing most patients while receiving least funding is the bottleneck it bears on. Whether FLASH spares normal tissue in people as it does in animals is the open question.

## Fields

- Kind: Company
- Last checked: 2026-09-04
- HQ: Palo Alto, CA
- Type: devices
- Website: https://www.varian.com

## Sources

- Official website: https://www.varian.com

## Connected records

- fronts: [Radiation Therapy](https://onco.cc/fronts/radiation/)
- technologies: [AI auto-contouring and adaptive planning](https://onco.cc/technologies/auto-contouring-ai/), [Brachytherapy](https://onco.cc/technologies/brachytherapy/), [C-arm medical linear accelerators (TrueBeam, Versa HD and others)](https://onco.cc/technologies/c-arm-linac/), [Cryoablation systems](https://onco.cc/technologies/cryoablation-systems/), [Electron beam therapy systems (linac electrons, total skin electron units, mobile electron IORT)](https://onco.cc/technologies/electron-beam-therapy-systems/), [Electronic patient-reported outcomes and remote monitoring](https://onco.cc/technologies/remote-patient-monitoring/), [FLASH radiotherapy](https://onco.cc/technologies/flash-rt/), [FLASH research accelerators (Oriatron, Mobetron FLASH, ProBeam FLASH)](https://onco.cc/technologies/flash-research-accelerators/), [IMRT / IGRT (modern external beam)](https://onco.cc/technologies/imrt-igrt/), [In-room imaging for radiotherapy (cone-beam CT, ExacTrac, CT-on-rails, HyperSight)](https://onco.cc/technologies/in-room-imaging-systems/), [Linac, proton system and brachytherapy machine manufacturing](https://onco.cc/technologies/radiotherapy-equipment-manufacturing/), [Oncology EHR modules and treatment pathways](https://onco.cc/technologies/hospital-information-systems-oncology/), [Oncology information and record-and-verify systems (ARIA, MOSAIQ)](https://onco.cc/technologies/oncology-information-systems/), [Patient positioning and surface guidance systems (AlignRT, Catalyst, ExacTrac Dynamic)](https://onco.cc/technologies/patient-positioning-surface-guidance-systems/), [Proton arc therapy](https://onco.cc/technologies/proton-arc-therapy/), [Proton therapy](https://onco.cc/technologies/proton-therapy/), [Proton therapy machines: cyclotrons, synchrotrons and single-room systems](https://onco.cc/technologies/proton-therapy-systems/), [Radiotherapy treatment planning and QA software](https://onco.cc/technologies/treatment-planning-systems/), [Remote afterloaders for HDR brachytherapy](https://onco.cc/technologies/brachytherapy-afterloaders/), [Respiratory gating and tumour tracking systems (RPM, ABC, Calypso, Synchrony)](https://onco.cc/technologies/respiratory-gating-tumour-tracking-systems/), [Ring-gantry linacs (Halcyon, Ethos)](https://onco.cc/technologies/ring-gantry-linac/), [Stereotactic radiosurgery (Gamma Knife, CyberKnife, linac SRS)](https://onco.cc/technologies/radiosurgery-srs/)
- bottlenecks: [Surgery and radiotherapy cure most, get least](https://onco.cc/bottlenecks/b-surgery-radiation-innovation/)
- ideas: [A coordinated FLASH radiotherapy evidence programme with shared dose-rate standards](https://onco.cc/ideas/idea-fund-flash-evidence-programme/), [A Gavi-style pooled purchaser for radiotherapy equipment and service](https://onco.cc/ideas/idea-acc-pooled-procurement-radiotherapy/), [A national repository of radiotherapy dose plans linked to outcomes](https://onco.cc/ideas/idea-data-radiotherapy-dose-repository/), [An open-hardware radiotherapy machine built for unreliable power and dust](https://onco.cc/ideas/idea-acc-open-hardware-linac/), [Certify every oncology software product for a standard bulk data export](https://onco.cc/ideas/idea-data-oncology-api-certification/), [Compact FLASH and proton systems at the price of a conventional linac](https://onco.cc/ideas/idea-moon-compact-flash-proton/), [Coverage-with-evidence registries for MR-guided and adaptive radiotherapy](https://onco.cc/ideas/idea-fund-adaptive-radiotherapy-evidence/), [Pay for radiotherapy machine uptime, not for the machine](https://onco.cc/ideas/idea-acc-linac-uptime-contracts/), [Radiotherapy for everyone who needs it by 2040](https://onco.cc/ideas/idea-moon-radiotherapy-for-everyone-2040/), [Validate and reimburse AI contouring and planning to expand radiotherapy capacity](https://onco.cc/ideas/idea-fund-rt-planning-ai-capacity/)
- institutions: [Aarhus University Hospital](https://onco.cc/institutions/aarhus-university-hospital/)
- roadmaps: [Radiotherapy roadmap: X-rays → shaped beams → fewer fractions, particles and FLASH](https://onco.cc/roadmaps/radiation-roadmap/)

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