Madison-based Tomo Therapy Inc. a manufacturer of radiation therapy equipment, will acquire Chengdu Twin Peak Accelerator Technology Inc., a privately held linear accelerator manufacturer based in Chengdu, China. The linear accelerators designed, developed and manufactured by Twin Peak will be used to supplement TomoTherapy’s existing supply source. The financial terms of the transaction were not disclosed. TomoTherapy anticipates that the transaction will close in approximately 90 days.