About SIR The Society of Interventional Radiology (SIR) is a thriving professional medical society dedicated to optimizing patient care and improving lives through minimally invasive, image-guided treatments. Located in Fairfax, Virginia, SIR represents one of the most innovative, exciting and competitive specialties in medicine today.  SIR is a 501(c)(6) professional association that supports more than 8,100 interventional radiology physicians, trainees, medical students, scientists and clinical professionals. SIR is also comprised of SIR’s 501(c)(3) Foundation, which focuses on research and fundraising to advance the future of interventional radiology. Together SIR and SIR Foundation have nearly 50 staff, combined annual revenues of $12.6 million,