RaySearch Laboratories

M&A Activity • May 3, 2010

PRESS RELEASE - STOCKHOLM, MAY 3, 2010

RaySearch and Varian Medical Systems expand strategic collaboration

RaySearch Laboratories AB (publ) announces today that the license agreement with Varian Medical Systems has been restructured to add one new product, strengthen the collaborative product development efforts, and make it easier to add new capabilities and features to Varian's Eclipse™ treatment planning system. Eclipse software currently incorporates three RaySearch developments, including tools for biological evaluation, biological optimization, and conformal optimization.

"Varian is an innovative partner and also the leader in the radiation therapy industry, so it is of great importance to RaySearch that we continue to strengthen our collaboration. Extending the partnership to include more development is a very positive step forward," said Johan Löf, CEO of RaySearch. "We are proud to contribute toward the continued success of Eclipse."

"This agreement reaffirms our commitment to this partnership. We are very pleased with the RaySearch technologies already integrated with Eclipse, and are eager to work with them to rapidly bring additional planning capabilities to our customers," said Jeff Amacker, director of clinical solutions for Varian.

ABOUT RAYSEARCH

RaySearch Laboratories is a medical technology company that develops advanced software solutions for improved radiation therapy of cancer. RaySearch's products are mainly sold through license agreements with leading partners such as Philips, Varian, Siemens, Nucletron, IBA Dosimetry and TomoTherapy. To date, 15 products have been launched and RaySearch's software is used at some 1,500 clinics in more than 30 countries. In addition, existing license agreements cover more than 15 other products that are scheduled to be launched in the coming years. RaySearch was founded in 2000 as a spin-off from Karolinska Institutet in Stockholm and the company is listed in the Small Cap segment on NASDAQ OMX Stockholm.

For more information about RaySearch, visit www.raysearchlabs.com.

FOR FURTHER INFORMATION, CONTACT:

Johan Löf, President and CEO Telephone: +46 (0)8-545 061 30 johan.lof@raysearchlabs.com