Radiation therapy remains a cornerstone of cancer treatment, employing high-energy radiation to destroy cancer cells and shrink tumors. Advances in technology have significantly enhanced the precision and effectiveness of this therapy. Techniques like intensity-modulated radiation therapy (IMRT) and proton therapy allow for more accurate targeting of tumors while sparing healthy surrounding tissue. Stereotactic radiosurgery (SRS) provides a non-invasive option for treating small, localized tumors with high precision. These advancements have improved patient outcomes, reduced side effects, and expanded the range of cancers that can be effectively treated with radiation therapy.