The International Stereotactic Radiosurgery Society (ISRS) was founded as a global non-profit organization in 1991. As the largest professional association of its kind, ISRS is dedicated to advancing the field of Stereotactic Radiosurgery (SRS) and Stereotactic Body Radiation Therapy (SBRT) through multidisciplinary education and knowledge-sharing, collaborative research, and the definition and dissemination of best practices and clinical outcomes. ISRS supports its members by: Offering state-of-the-art educational activities Defining and disseminating clinical best practices and guidelines Fostering scientific research and collaboration Convening the ISRS Congress ISRS invites you to join a diverse, worldwide community of neurosurgeons, radiation oncologists, medical physicists and other healthcare professionals who are focused on the advancement of SRS and SBRT.