TomoTherapy has announced that co-founder Paul J. Reckwerdt will retire as president and relinquish his board directorship, effective Dec. 31.

Reckwerdt plans to pursue entrepreneurial opportunities and will serve as a strategic advisor to Compact Particle Acceleration Corporation, which is developing a compact proton therapy system in partnership with TomoTherapy.

Reckwerdt co-founded TomoTherapy with Rock Mackie, PhD, to commercialize a precise form of radiation therapy that the two researched at University of Wisconsin in Madison.