STOCKHOLM, Sweden--(BUSINESS WIRE)--RaySearch Laboratories AB (publ) and Nucletron BV are now initiating cooperation in treatment planning of proton radiation therapy of cancer. Today, the companies entered into a long-term development and license agreement that will result in a pioneering system for treatment planning and optimization of radiation therapy with protons. The new system, which is being built by RaySearch, will be integrated in Nucletron’s treatment planning system Oncentra™ MasterPlan.