Radiation Oncology

Intraoperative Radiation Therapy (IORT)

St. Joseph Hospital remains at the forefront of medical innovation with intraoperative radiation therapy (IORT), one of the most advanced forms of radiation available in the United States. IORT delivers a single, high dose radiation treatment to the tumor site at the time of surgery. This treatment adds approximately 30-45 minutes to the surgical time. This is used primarily for early stage breast cancer in women over the age of 40, and can replace the need for 5-6 weeks of daily radiation treatment. In addition to shortened treatment time, this type of focused radiation avoids most normal tissue resulting in minimal side effects and excellent cosmesis or appearance of the treated breast.

There are currently two large clinical trials which have shown that early local tumor control rates and survival rates are similar between IORT and the standard 6 week course of whole breast radiation.

At St. Joseph Hospital, a portable electron linear accelerator unit, called Mobetron, is used to deliver intraoperative electron radiotherapy. St. Joseph Hospital is one of the most experienced centers for this treatment in the United States, having treated over 200 patients since 2010.

As Orange County’s first hospital to offer this advanced form of radiation treatment for breast cancer patients, St. Joseph Hospital physicians are experts in its use and will continue their pursuit of clinical excellence and increased patient comfort by expanding the use of IORT to treat additional cancer sites in the future.

For additional information on IORT, please call 714-734-6233.

Click here to find out more about IORT.