Stereotactic radiosurgery (SRS) is a special radiotherapy technique used to irradiate intracranial lesions by 3-D arrangements of narrow photon beams eliminating the needs of invasive surgery. Three different tertiary collimators. namely BrainLab and Radionics circular cones and BrainLab micro multileaf collimator (mMLC). are used for linear accelerator-based SRS systems (X-Knife). https://jeepworldes.shop/product-category/light-bars/