A linear accelerator (LINAC) generates high-energy X-rays or electrons to destroy cancer cells with precision. Models from Elekta and Varian use advanced beam-shaping technologies like MLCs to target tumors while sparing healthy tissue. Installed in radiation oncology departments for daily radiotherapy sessions. Supports IMRT, VMAT, SBRT, and IGRT techniques for superior accuracy. On-board imaging ensures real-time tumor alignment before each session. High output efficiency allows faster treatment delivery. Radiation shielding ensures safety for staff and patients. Used for cancers of the lung, breast, brain, pelvis, and more. Requires skilled physicists for calibration and QA. Fully compliant with AERB radiation protection standards in India.