Company lists · Data refreshed September 2026
Top 25 Radiotherapy equipment manufacturers based in the United States
RevenueBase identified 80 radiotherapy equipment manufacturers headquartered in the United States as of September 2026 and tracks 11,950 professional contacts across them, including 5,940 with verified work emails. Houston is the largest hub.
This list covers radiotherapy equipment manufacturers headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 30, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest radiotherapy equipment manufacturers based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 8,815 contacts → | ||||
Indirect evidence “At Varian, a Siemens Healthineers company, we envision a world without fear of cancer.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,021 contacts → | ||||
Indirect evidence “We work passionately to expand the curative power of radiation therapy to improve as many lives as possible.#AccurayExpandRT #CyberKnife #Radixact #TomoTherapy #AccurayExchange” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 3 | 227 contacts → | ||||
Indirect evidence “Mevion Medical Systems, Inc.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 4 | 188 contacts → | ||||
Partial evidence “BSD Medical Corporation develops, manufactures, markets and services medical systems that deliver precision-focused radio frequency or microwave energy into diseased sites of the…” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 5 | 125 contacts → | ||||
Partial evidence “CQ Medical is the global leader in patient radiotherapy positioning and healthcare innovations that advance human care.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 6 | 123 contacts → | ||||
Indirect evidence “Leveraging unique gyroscopic motion, ZAP-X® opens new frontiers in modern radiosurgery.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 7 | 91 contacts → | ||||
Partial evidence “Innovative Medical Device Manufacturer and Distributor High quality care is the primary concern of both patients and their providers.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 8 | 73 contacts → | ||||
Indirect evidence “In 1982, Dr.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 9 | 73 contacts → | ||||
Indirect evidence “At Merit Oncology, we are committed to easing the burden of cancer on patients and their loved ones by developing unparalleled technologies to improve the treatment process for…” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 10 | 68 contacts → | ||||
Partial evidence “Standard Imaging is a leading manufacturer of QA instruments for radiation-based treatments that improves patient safety and cancer treatments.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 11 | 56 contacts → | ||||
Indirect evidence “Xstrahl is a medical technology company that designs clinical and research systems to help eradicate cancer.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 12 | 42 contacts → | ||||
Indirect evidence “Optivus Proton Therapy, Inc.(Optivus), was formed in 1993 with a mission: To Save Lives with Proton Therapy Optivus' mission is alive and well and is exemplified by the work we do…” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 13 | 42 contacts → | ||||
Indirect evidence “The Xoft® Electronic Brachytherapy System® is an isotope-free radiation treatment cleared by the FDA for use anywhere in the body, including non-melanoma skin cancer, brain…” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 14 | 38 contacts → | ||||
Indirect evidence “The introduction of Cesium-131 represents the culmination of decades of work and millions of dollars of investment.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 15 | 33 contacts → | ||||
Indirect evidence “IntraOp® is the leading innovator of electron therapy devices for treating cancer.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 16 | 28 contacts → | ||||
Partial evidence “Radiology Oncology Systems (ROS) is a global provider of pre-owned radiation therapy and diagnostic imaging equipment, including linear accelerators, CT Scanners, PET/CT, MRI…” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 17 | 28 contacts → | ||||
Indirect evidence “Global Leader in Proton Beam Therapy (PBT) Service & Maintenance.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 18 | 23 contacts → | ||||
Indirect evidence “Intera Oncology is a rapidly growing Boston-based life science company on a mission to change the course of cancer for patients with metastatic colorectal cancer and…” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 19 | 20 contacts → | ||||
Indirect evidence “Aktina Medical is owned and operated by certified Medical Physicists with over 30 years experienced and active contributions to the Radiation Oncology community.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 20 | 20 contacts → | ||||
Indirect evidence “Hopewell Designs Inc provides automated and manual calibration irradiator systems and radiation shielding for government laboratories, nuclear power plants, private industry…” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 21 | 19 contacts → | ||||
Indirect evidence “Eckert & Ziegler Radiopharma Inc is a company based out of 25 Upton Dr, Wilmington, Massachusetts, United States.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 22 | 19 contacts → | ||||
Partial evidence “ProTom International is a leading device manufacturer of proton therapy technology.” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 23 | 18 contacts → | ||||
Partial evidence “As a leading provider of radiosurgical and radiation therapy equipment, American Shared Hospital Services (ASHS) has the talent, knowledge, and infrastructure to provide maximum…” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 24 | 18 contacts → | ||||
Indirect evidence “Akesis, named after the Greek god of healing, is a U.S-based radiation oncology technology company dedicated to making precise, effective cancer treatment accessible to more…” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
| 25 | 16 contacts → | ||||
Partial evidence “Best Medical International specializes in brachytherapy solutions, and manufactures Best® Iodine-125, Best® Palladium-103, Iridium-192 and Gold-198 seeds, along with HDR…” Source: RevenueBase Database · checked Sep 30, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: radiotherapy equipment manufacturers. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names radiotherapy equipment manufacturers.
- Partial evidence
- Its own public description names part of radiotherapy equipment manufacturers, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name radiotherapy equipment manufacturers. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 80 radiotherapy equipment manufacturers based in the United States
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Radiotherapy equipment manufacturers based in the United States at a glance
As of Sep 30, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 80 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among radiotherapy equipment manufacturers, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the United States whose own description of what they do matches “radiotherapy equipment manufacturers”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names radiotherapy equipment manufacturers), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among radiotherapy equipment manufacturers, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 5,940 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 30, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names radiotherapy equipment manufacturers, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many radiotherapy equipment manufacturers are there based in the United States?
RevenueBase identified 80 radiotherapy equipment manufacturers headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Varian, headquartered in Palo Alto, tops this list with the largest team on record.
Which city has the most radiotherapy equipment manufacturers?
Houston leads with 3 headquartered companies, followed by Alpharetta (2) and Avondale (2).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 5,940 verified decision-maker contacts tracked across these 80 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 30, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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