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SAVI® brachytherapy combines the skin-sparing dosimetry of interstitial brachytherapy with the single-entry ease of balloon brachytherapy. The applicator uses an expandable bundle of catheters placed in the lumpectomy cavity through a single incision. As with the multicatheter and balloon brachytherapy options, the typical treatment schedule is twice daily for 5 days. This hybrid approach is designed to allow more flexible treatment planning, enable better shaping and control of the radiation dose and reduce radiation exposure to the skin and chest wall. SAVI is being evaluated in a separate clinical trial.