Evaluating the Safety and Efficacy of a Novel Accelerated Partial Breast Irradiation Regimen

The lumpectomy bed will receive a total of 26 Gy in 5 fractions, with 1 fraction delivered per day. Ideally, the course of radiation therapy would be completed over 5 consecutive treatment days. Treatment must begin within 12 weeks of lumpectomy or re-excision of surgical margins and must be completed within 10 calendar days.