Varian Medical Systems

Palo Alto, California, U.S.  All United States companies → — Founded 1948
Medical Device / Hardware Specialty-Focused AI
Oncology Radiology
Clinical Decision Support & Reference Oncology AI Radiology & Imaging AI
Acquired (Operating Subsidiary of Siemens Healthineers) — $16.4 billion (acquisition amount)

Products

Ethos Treatment Planning (2.0)
Varian Medical Systems
Oncology AI
Ethos Treatment Planning (2.0) is an AI-driven adaptive radiotherapy system by Varian Medical Systems, enabling daily, personalized adjustments to cancer treatment plans based on real-time patient anatomy changes for enhanced precision and efficiency.
Ethos Treatment Management (3.0)
Varian Medical Systems
Clinical Decision Support & Reference
Ethos therapy is an artificial intelligence (AI)-driven system designed to increase the capability, flexibility and efficiency of radiotherapy, delivering an entire adaptive treatment in a typical 15-minute timeslot, from patient setup through treatment delivery.
AI Segmentation
Varian Medical Systems
Oncology AI
Varian's AI Segmentation is a web-based, AI-powered tool that automates and accelerates the contouring of organs at risk and other anatomical structures from CT images for radiation therapy planning, seamlessly integrating with Varian's Eclipse system.

See all 3 products →

About Varian Medical Systems

Varian Medical Systems, a Siemens Healthineers company, is a global leader in the field of cancer care, specializing in the development and delivery of innovative technologies and software solutions for treating cancer and other medical conditions. For physicians, Varian provides a comprehensive portfolio encompassing advanced radiotherapy, radiosurgery, proton therapy, and brachytherapy systems, including linear accelerators (LINACs) and the ProBeam Proton Therapy System. The company also offers sophisticated oncology information systems (OIS) and treatment planning software, such as ARIA and Eclipse, designed to streamline clinical workflows, manage patient data, and enhance precision in treatment delivery across cancer clinics, radiotherapy centers, and medical oncology practices.

A key focus for Varian is the integration of artificial intelligence (AI) and machine learning to advance personalized and data-driven cancer care. The company leverages AI-assisted analytics to develop intelligent cancer care systems, aiming to automate routine tasks, improve decision-making, and enhance treatment outcomes. Examples include AI-driven Ethos Radiotherapy system for adaptive therapy and collaborations to build AI models for tasks like automated organ segmentation on diagnostic images, which is crucial for precise treatment planning. This commitment to AI-powered support tools and advanced imaging systems underscores Varian’s dedication to empowering clinicians with cutting-edge technology to deliver the right care at the right time.

Focus Areas

Radiation oncology radiosurgery proton therapy brachytherapy cancer treatment software AI in oncology adaptive therapy X-ray imaging components interventional oncology

Business Intelligence

Key InvestorsSiemens Healthineers (parent company)
PartnershipsSiemens Healthineers (parent company, previously strategic partnership 'EnVision'), Google Cloud, Icon Group, Telix, Embolx
AcquisitionsAcquired by Siemens Healthineers (April 2021). Prior acquisitions by Varian include: Aspekt Solutions (2023), Endocare (2019), Cancer Treatment Services International (CTSI) (2019), Noona Healthcare (2018), Velocity Medical Solutions (2018), Mobius Medical Systems (2018), Sirtex Medical (2018), MeVis Medical Solutions AG (2014)
TechnologyAI-driven adaptive therapy systems (e.g., Ethos Therapy), Google Cloud AI Platform (for organ segmentation), machine learning for treatment planning (e.g., RapidPlan), cloud-based oncology information systems (e.g., ARIA, Noona)
FDA ClearancesMultiple, including Ethos Therapy (FDA clearance Feb 2020), TrueBeam for Low-Dose Radiotherapy for Osteoarthritis (FDA 510(k) clearance March 2026). Embozene® Microspheres (Oct 2021) and Cardiac Radioablation (May 2021) received FDA Breakthrough Device Designation. cleared products (estimated)

What Physicians Need to Know

Radiation Oncology & Radiosurgery
Varian is a global leader in radiation oncology, offering advanced linear accelerators (LINACs) and systems for radiotherapy and radiosurgery. Key systems include TrueBeam, Edge, and Halcyon, designed for precise and efficient treatment delivery. TrueBeam is a fully integrated system for image-guided radiotherapy and radiosurgery, while Edge specializes in radiosurgery. Halcyon is known for its streamlined workflow and patient experience. These systems enable various techniques like IMRT, VMAT, and SBRT, ensuring targeted radiation to tumors while sparing healthy tissue.
Proton Therapy
Varian offers comprehensive proton therapy solutions with its ProBeam Proton Therapy System. This system utilizes Intensity Modulated Proton Therapy (IMPT) with pencil-beam scanning, allowing for highly conformal dose distributions and precise targeting of complex tumors.
Brachytherapy
Varian provides brachytherapy solutions, an internal radiation therapy, with products like the BRAVOS and GammaMedplus iX afterloaders. Their BrachyVision treatment planning system supports the precise planning and delivery of brachytherapy, which remains a crucial option for many cancer patients.
Cancer Treatment Software
Varian's software portfolio, including the ARIA Oncology Information System (OIS) and Eclipse treatment planning system, provides a comprehensive suite for managing cancer clinics, radiotherapy centers, and medical oncology practices. ARIA OIS streamlines practice management, financial administration, reporting, and clinical workflows, supporting multidisciplinary collaboration and personalized care pathways. The 360 Oncologyu2122 care management platform integrates various oncology disciplines to facilitate coordinated care.
AI in Oncology & Adaptive Therapy
Varian is at the forefront of AI-driven adaptive therapy with its Ethos Therapy system. Ethos uses artificial intelligence to adapt treatment plans daily based on changes in patient anatomy, such as tumor shrinkage or organ movement, enabling real-time, personalized radiotherapy. This system can deliver an entire adaptive treatment in a typical 15-minute timeslot, significantly improving efficiency. AI is also leveraged for automated 3D image segmentation and radiation therapy planning.
X-ray Imaging Components
Varian is a leading independent supplier of X-ray tubes, digital flat-panel detectors (PaxScan), and image processing software (Nexus). These components are crucial for high-quality X-ray imaging in medical diagnostics, as well as industrial and security applications.
Interventional Oncology
Varian's interventional oncology portfolio includes minimally invasive solutions such as cryoablation (Cryocare SLu2122 System), microwave ablation (MicroThermXu00ae), and embolization microspheres (Embozeneu00ae, Oncozeneu00ae). These technologies allow for targeted treatment of tumors through heating, freezing, or delivering therapeutic agents, often with shorter recovery times and fewer side effects.
Physician Tip

For physicians, Varian Medical Systems stands out due to its commitment to precision and personalized cancer care, driven by advanced technology. The Ethos Adaptive Therapy system, powered by AI, allows for daily adjustments to treatment plans, ensuring optimal targeting and sparing of healthy tissue, which can lead to improved patient outcomes and reduced side effects. Their comprehensive software solutions, like ARIA OIS and Eclipse, streamline complex workflows, facilitate multidisciplinary collaboration, and provide robust data analytics for informed decision-making and consistent quality of care. Varian's integrated ecosystem, from advanced imaging components to diverse treatment modalities (radiotherapy, radiosurgery, proton therapy, brachytherapy, interventional oncology), offers a broad spectrum of tools to address various cancer types and patient needs. The focus on efficiency, such as the 15-minute adaptive treatment with Ethos, also helps optimize clinic operations and patient throughput.

Varian's solutions are designed for a connected cancer care approach, offering a comprehensive oncology ecosystem. Their software platforms, such as ARIA CORE, are built to integrate and provide a seamless flow of information across various oncology disciplines (radiation, medical, surgical oncology, and diagnostics). As a Siemens Healthineers company, Varian benefits from and contributes to a broader portfolio of diagnostics, imaging, and interventional therapy innovations, aiming to enhance the entire patient journey. This integration supports interoperability and data-driven decision-making, crucial for modern cancer care.

Products by Varian Medical Systems

3 products in the directory

Ethos Treatment Planning (2.0)
Varian Medical Systems
Oncology AI
Ethos Treatment Planning (2.0) is an AI-driven adaptive radiotherapy system by Varian Medical Systems, enabling daily, personalized adjustments to cancer treatment plans based on real-time patient anatomy changes for enhanced precision and efficiency.
Ethos Treatment Management (3.0)
Varian Medical Systems
Clinical Decision Support & Reference
Ethos therapy is an artificial intelligence (AI)-driven system designed to increase the capability, flexibility and efficiency of radiotherapy, delivering an entire adaptive treatment in a typical 15-minute timeslot, from patient setup through treatment delivery.
AI Segmentation
Varian Medical Systems
Oncology AI
Varian's AI Segmentation is a web-based, AI-powered tool that automates and accelerates the contouring of organs at risk and other anatomical structures from CT images for radiation therapy planning, seamlessly integrating with Varian's Eclipse system.

What the Web Says

Varian Medical Systems, a Siemens Healthineers company, is a global provider of innovative cancer care technologies and solutions, specializing in advanced radiation therapy, radiosurgery, proton therapy, and brachytherapy systems, along with software for managing comprehensive cancer care. The company is generally regarded as a reputable employer in the healthcare technology industry. Product reviews highlight the user-friendliness and comprehensive integration of their ARIA Oncology Information System. Employer reviews are mixed, with some praising the meaningful work and good benefits, while others point to issues with management and work-life balance.

Overall: Mixed

Strengths

  • World-class technology and a mission that genuinely helps patients.
  • ARIA Oncology Information System is user-friendly, well-organized, and offers comprehensive integration of oncology practices.
  • Good benefits, including health care and 401k matching.
  • Meaningful work that contributes to saving lives.
  • Collaborative work environment and great colleagues.
  • Opportunities to learn new skills and develop transferable skills.

Limitations

  • Management issues, including incompetence, disorganization, lack of professionalism, and ethical concerns.
  • Work-life balance can be challenging, especially for roles involving travel and long hours.
  • Limited growth opportunities in some areas.
  • Culture can be toxic in certain departments, with gossiping and unfair appraisals.
  • Pay is considered average for some roles.
  • The ARIA system can have too many clicks and be slightly glitchy upon login.

Based on reviews from: G2, Indeed.com, Reddit, Zippia, Comparably, Breakroom

Last updated: 2026-07-19

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Press & Coverage

Applied Radiation Oncology
Varian TrueBeam Secures Regulatory Clearance for Low-Dose Radiotherapy in Osteoarthritis Treatment
Siemens Healthineers announced that its Varian TrueBeam radiotherapy systems received FDA 510(k) clearance for low-dose radiation therapy in adults with medically refractory osteoarthritis, expanding its use beyond cancer care.
2026-03
AuntMinnie
Varian highlights Fast-02 proton Flash therapy trial results
Varian, a Siemens Healthineers company, published results from its Fast-02 clinical trial, demonstrating 75% complete pain relief at three months for proton Flash therapy in patients with painful thoracic bone metastases.
2026-07
Business Wire
More Impact, Together: Varian and Siemens Healthineers Portfolios Highlight More Impact, Innovations and More Breakthroughs Throughout Cancer Care Journey at ESTRO 2025
Varian and Siemens Healthineers will showcase new technologies at ESTRO 2025, including the RapidArc Dynamic solution and ARIA CORE oncology management solution, emphasizing integrated and personalized cancer care.
2025-05
Business Wire
Together with Siemens Healthineers, Varian Highlights Software and Imaging Innovations to Enable Personalized Patient Care at ASTRO 2024
Varian, a Siemens Healthineers company, will present its latest software and imaging innovations at ASTRO 2024, focusing on enhancing patient outcomes through automated and integrated cancer care pathways.
2024-09
PR Newswire
Varian Medical Systems Invests in COTA, Inc. to Help Drive Faster, More Accurate Data-Driven Cancer Care
Varian announced a $10M investment and collaboration with COTA, Inc. to empower cancer clinics with data analytics and decision support tools, leveraging real-world evidence for improved and cost-effective care.
2020-11
BioWorld
Varian receives FDA 510(k), CE mark for Halcyon and Ethos radiotherapy systems with Hypersight
Varian's Halcyon and Ethos radiotherapy systems received both U.S. FDA 510(k) clearance and CE marking, with the first patient already treated using a Halcyon system with Hypersight.
2023-03
BioWorld
Varian secures IDE for experimental cancer therapy trial
Varian Medical Systems Inc. received an investigational device exemption (IDE) from the U.S. FDA to begin a clinical trial for its experimental Flash radiation therapy, which delivers radiation at ultra-high dose rates.
2023-03
Imaging Technology News
Varian TrueBeam Radiotherapy Systems Get FDA Clearance
Siemens Healthineers announced FDA clearance for its Varian TrueBeam radiotherapy systems, which include new product iterations across the entire portfolio.
2026-03

Frequently Asked Questions

Varian offers advanced linear accelerators like TrueBeam and Halcyon, providing precise image-guided radiotherapy and radiosurgery for various cancers with enhanced speed and patient comfort. Their ProBeam 360u00b0 Proton Therapy System delivers highly targeted proton beams, reducing radiation dose to healthy tissues and offering customizable multi-room configurations.
Varian's Ethos therapy is an AI-driven adaptive intelligence solution that enables real-time treatment plan adjustments based on daily anatomical changes, optimizing precision and personalization within typical treatment times. Their comprehensive software, including ARIA for information management and Eclipse for treatment planning, integrates AI and machine learning (e.g., RapidPlan PT) to streamline workflows and enhance patient care.
Varian provides brachytherapy solutions such as the HDR Brachytherapy System for targeted radiation delivery directly at tumor sites, and VariSeed software for precise prostate seed implant planning. These offerings, alongside interventional oncology products like cryoablation and embolization solutions, aim to integrate comprehensive treatment options for localized cancers.
While Varian spun off its dedicated X-ray imaging components business (Varex Imaging) in 2017, its radiation oncology systems like TrueBeam and Halcyon integrate advanced X-ray imaging capabilities. These include cone-beam CT (CBCT) and HyperSight imaging for high-quality, real-time image guidance, crucial for accurate patient positioning and adaptive therapy during treatment.
Varian maintains a strong commitment to complying with global regulatory standards for its oncology solutions, including obtaining necessary clearances like FDA 510(k) for new functionalities. They provide resources and support to healthcare providers to help navigate regulatory requirements, ensuring product safety and adherence to ethical standards.
Following its acquisition by Siemens Healthineers, Varian's approach to pricing is integrated within the broader Siemens Healthineers strategy, focusing on delivering comprehensive cancer care solutions. They continue to offer ongoing technical support and leverage strategic partnerships, such as the 'EnVision' collaboration, to provide integrated imaging and therapy solutions and enhance customer value.
As a subsidiary of Siemens Healthineers since April 2021, Varian maintains its headquarters and employees, operating as a key component in creating a global leader in cancer care. The long-term vision involves leveraging AI-assisted analytics and a highly integrated portfolio to advance cancer diagnosis, treatment delivery, and post-treatment survivorship, ensuring continued product development and customer stability.

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