Radiotherapy Posted on 18th December 20158th April 2022 by ThePD (The Project Definition) Radiotherapy is a treatment where radiation is used to kill cancer cells. (Refer to the Radiation Therapy) Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window) Related Posted in HSE and tagged health, radiation. ThePD (The Project Definition) ThePD has been developing the Preferred Project Definitions based on the actual project execution and operation experiences and knowledge with the Project Language, and sharing with you daily basis.