Breast IORT is radiation treatment delivered as a single radiation dose at the time of breast conserving surgery (lumpectomy). IORT is a form of brachytherapy, where radiation is delivered within the surgical cavity.

Some patients with early stage cancer may now have the option of receiving both cancer surgery and radiation treatment at the same time – eliminating the need for weeks of travel, disruption to their daily lives, and anxiety. For patients meeting certain criteria, IORT can deliver a complete dose of radiation in one treatment during the surgical procedure. 


  • IORT at the time of surgery avoids the need for 6-7 weeks of post-operative External Bean Radiation Therapy. For you, this means less travel, fewer days off work, fewer appointments, and less emotional stress.
  • Radiotherapy is delivered directly to the tumor bed, the part of the breast at highest risk of recurrence.
  • If reconstruction is a consideration it can be completed during your surgery.
  • Less radiation is delivered to surrounding healthy organs and tissue.