The TomoTherapy System is the only radiation system specifically designed for image-guided intensity-modulated radiation therapy (IMRT). Leveraging a CT scanner-based platform, TomoHelical™ mode enables continuous delivery from 360 degrees around the patient with highly conformal and homogeneous dose to the tumor. A clinician can also choose to deliver treatment from specific fixed angles via TomoDirect™ mode. These unique features, combined with daily 3D image guidance, enable physicians to efficiently deliver highly accurate, individualized dose distributions which precisely conform to the shape of the patient's tumor while minimizing dose to normal, healthy tissue for a variety of cancer types, including breast cancer. This is especially important for women diagnosed with cancer in the left breast, where the tumor may be close to critical organs such as the heart.

For further information on the TomoTherapy System, visit http://www.accuray.com/solutions/treatment-delivery/tomotherapy-treatment-delivery/h-series


About the Phase II Trial
The study was designed to assess the role of once-daily accelerated partial breast irradiation in terms of cosmetic and local results. The primary endpoints of this trial were breast tumor recurrence and toxicity. Secondary outcomes were rates of adverse cosmesis, quality of life and compliance. Patients who had previously undergone breast-conserving surgery were enrolled in the study. Radiation treatments were administered in 10 daily fractions of 3.85 Gy.

Important Safety Information
For Important Safety Information please refer to http://www.accuray.com/safety-statement-radiation-treatment

About Accuray
Accuray Incorporated (Nasdaq: ARAY) is a radiation oncology company that develops, manufactures and sells precise, innovative treatment solutions that set the standard of care with the aim of helping patients live longer, better lives. The company's leading-edge technologies deliver the full range of radiation therapy and radiosurgery treatments. For more information, please visit www.accuray.com.

Safe Harbor Statement
Statements made in this press release that are not statements of historical fact are forward-looking statements and are subject to the "safe harbor" provisions of the Private Securities Litigation Reform Act of 1995. Forward-looking statements in this press release relate, but are not limited, to clinical applications, clinical results, patient outcomes and Accuray's leadership position in radiation oncology innovation and technologies. Forward-looking statements are subject to risks and uncertainties that could cause actual results to differ materially from expectations, including but not limited to the risks detailed from time to time under the heading "Risk Factors" in the company's report on Form 10-K, filed on August 28, 2015, the company's reports on Form 10-Q, filed on November 5, 2015 and February 1, 2016 and April 29, 2016, and the company's other filings with the SEC.

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