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About us


RaySearch® is advancing cancer treatment through pioneering software. Software has unlimited potential, and it is now the driving force for innovation in oncology. Medical science never stands still and neither does RaySearch. We work in close cooperation with leading cancer centers to bring scientific advancements faster to the clinical world. Today, our solutions support thousands of clinics worldwide in the fight against cancer. 

And this is just the beginning.



RaySearch® is a medical technology company that develops innovative software solutions for improved cancer treatment. RaySearch markets the RayStation®* treatment planning system (TPS) and the oncology information system (OIS) RayCare®*. The most recent additions to the RaySearch product line are RayIntelligence® and RayCommand®. RayIntelligence is an oncology analytics system (OAS) which enables cancer clinics to collect, structure and analyze data. RayCommand, a treatment control system (TCS), is designed to link the treatment machine and the treatment planning and oncology information systems.

RaySearch software is used by over 800 clinics in more than 40 countries. The company was founded in 2000 as a spin-off from the Karolinska Institute in Stockholm and the share has been listed on Nasdaq Stockholm since 2003.

*Subject to regolatory clearance in some markets.




An unusual year for the world but another strong year for RaySearch. Most of the company’s 400+ employees chose to work remotely, while partners and customers participated in virtual tradeshows and online events. RayStation* 10B offered support for brachytherapy planning and a speed revolution in proton Monte Carlo dose computation. The advanced system was selected by Norway’s first national proton therapy center, Germany’s Heidelberg University Hospital for helium-ion, and South Korea's Yonsei Cancer Center for superconducting carbon gantry rooms. It entered clinical use at proton centers in Spain and supported BNCT in Japan. A distribution deal for the South African market was signed and the first clinic in South America went live with RayStation for the Radixact® radiation therapy system from Accuray. RayCare* 4A and 4B arrived with new functionalities and enhancements. Elsewhere, RaySearch entered into an interoperability agreement with Varian Medical Systems and launched the oncology analytics system RayIntelligence*.

*Regulatory clearance required in some markets.


In the year that saw the release of RayStation* 9A and 9B, as well as RayCare* 3A and 3B, several notable events took place. Significant orders arrived from all over the world for RayStation, including those from the Isala Oncologisch Centrum in the Netherlands, the Medical University of Vienna and a proton therapy center in Prague. In the US, MedAustron chose RayStation, RayCare and RayCommand for two proton and carbon-ion clinics in a landmark agreement for the company. RaySearch received regulatory clearance for RayStation in the US and China and signed a distribution agreement for Russia. The company also announced it plans to expand to new headquarters in a purpose-built life sciences district of Stockholm, Sweden, in 2021.

*Regulatory clearance required in some markets.


2018 was a year with some major news and releases. Early in the year, RaySearch received its first order of the next-generation OIS RayCare*, from Anderson Regional Cancer Center (ARCC) in USA. In October, RayCare was used as the sole OIS for patient treatments at Provision Cares Proton Therapy in Nashville, USA, in combination with the treatment planning system RayStation. Two releases of RayStation was issued during the year, including support for TomoDirect treatment delivery in RayStation 8A, and some highly anticipated machine learning features in RayStation 8B*. Ottawa Hospital, Canada, became the 500th RayStation-customer during the summer.

*Regulatory clearance required in some markets.


The year begins in a prestigious way, when CEO Johan Löf wins EY Entrepreneur of the year. RaySearch establishes a machine learning department, to continue the work of improving future cancer treatments. The interest from Japan keeps growing, and we open a wholly owned subsidiary in Tokyo We release RayStation 7*, and finally get to release RayCare 1*. RayCare will evolve into an OIS designed to connect all the oncology disciplines with unique capabilities over subsequent releases, with the words from founder and CEO Johan Löf: “This will be a game changer”.

We also added more than 90 key employees to support the expansion.

*Regulatory clearance required in some markets.


RayStation continues to settle many big orders, and RayStation 6* is released. This version adds significant new functionality and a wide range of general improvements. Major additions include forthcoming support for Accuray TomoTherapy™ systems. 

We also had an impressing rise in net sale, which went up 34 percent. 

*Regulatory clearance required in some markets.



The RaySearch headquarters move to brand new, custom-designed, offices and a wide recruitment campaign marks a new phase and an accelerating global expansion.

By October 2015, 240 cancer centers worldwide, eager to stay at the forefront of radiation therapy of cancer, have chosen RayStation as their treatment planning system.


In 2014, RayStation sales really take off, the fourth European subsidiary is established in Germany and RayStation 4.5, featuring ultrafast robust optimization, is FDA cleared.


In early 2012, the first complete version of RayStation is released. The following year, RaySearch takes another important step when RayStation is approved for sale in one of the largest radiation therapy markets globally - China.


By October 2010, 510(k) clearance is obtained and the first order for RayStation in the United States comes from Massachusetts General Hospital.

The successful development of RaySearch’s advanced, modern, treatment planning system RayStation provides the groundwork for the sales success to come. The initial US sales and service organization is in place and the first European sales representative is recruited.

The first patient treatment using RayStation is performed at Massachusetts General Hospital.


In 2009, RaySearch is ready to launch RayStation; the innovative and user-friendly treatment planning system that the market needs. The German clinic WPE places the first order, and it is for proton therapy!


RaySearch decides in 2008 to develop a complete treatment planning system and sell it directly to clinics, in order to make RaySearch’s innovative new functionality available to the customers.

The company enters into a research collaboration with Massachusetts General Hospital and the development of the Multi-criteria optimization tool starts. Today this is one of the key features in RayStation.


Over the following years, RaySearch expands the business, partnering with Nucletron, IBA Dosimetry, TomoTherapy and Varian, and seeks closer collaboration with the clinical world too. Together with Princess Margaret Hospital in Canada, RaySearch pioneers the field of adaptive radiation therapy.


In June 2002, RaySearch relocates to larger offices, recruits more developers and other employees. In 2003 RaySearch is listed on Nasdaq Stockholm.


The following year, RaySearch sets up a corporate infrastructure by hiring additional developers and other staff, and in June delivers its first 131 software modules to hospitals via Philips.


The RaySearch story begins in 2000 when founder and CEO, Johan Löf, decides to start the company based on the scientific knowledge acquired during his PhD on radiation treatment of moving tumors at the Karolinska Institute.
A few months later, RaySearch concludes its first partner agreement with Philips, the leading treatment planning system vendor at the time.