UC Cancer Center, Varian complete Flash radiotherapy trial enrollment

FAST-02 study targets painful bone metastases in the thoracic region

Emily Daugherty, MD, Radiation Oncology.

Emily Daugherty, MD. Photo/University of Cincinnati.

Yahoo Finance highlighted Varian's announcement of the successful completion of enrollment and treatment in the FAST-02 clinical trial targeting painful bone metastases in the thoracic region with Flash radiotherapy at the University of Cincinnati Cancer Center. Completion of enrollment represents a significant step toward bringing this investigational radiotherapy treatment into clinical practice.

The trial was conducted at Cincinnati Children’s Hospital/UC Medical Center Proton Therapy Center and enrolled 10 participants. It focused on evaluating treatment-related side effects and the efficacy of treatment, which was assessed using trial participants' reported pain relief.

Flash therapy delivers treatment at ultra-high dose rates in typically less than one second — over 100 times faster than conventional radiation therapy — and has demonstrated potential in preclinical studies to reduce damage to surrounding healthy tissues while maintaining effective tumor control.

The trial builds upon findings from the FAST-01 trial, which evaluated clinical workflow feasibility of Flash therapy and treatment-related side effects for participants with bone metastases in the extremities.

The trial is led by principal investigator John Perentesis, MD, Cancer Center senior advisor, research director of the Proton Therapy Center and director of oncology and cancer programs at Cincinnati Children’s, and lead co-investigator Emily Daugherty, MD, University of Cincinnati Cancer Center physician researcher and adjunct associate professor in UC's College of Medicine.

"Completing treatments for FAST-02 is a pivotal and progressive step in our effort to establish the safety and effectiveness of Flash radiotherapy," Perentesis said. "This trial helps lay the groundwork needed to move Flash into more advanced clinical settings — an innovation that could redefine radiation oncology and meaningfully improve patient outcomes."

UC's FLASH program was initiated by John Breneman, MD, professor emeritus in the Department of Radiation Oncology in UC's College of Medicine. Anthony Mascia, PhD, associate professor in UC's College of Medicine, serves as lead physicist.

Read the Yahoo Finance article, originally published in the Varian newsroom.

Featured photo at top of a mock patient at a treatment gantry in the Proton Therapy Center. Photo/Cincinnati Children's.

Related Stories

2

UC's art collection on display at the Contemporary Arts Center

January 5, 2026

University of Cincinnati leaders joined WVXU's Cincinnati Edition to talk about the university’s 200-year-old art collection, a new exhibition at the Contemporary Arts Center and the release of a companion book exploring the collection’s role in education and public engagement.

3

UC faculty and staff among Rising Star leadership honorees

January 5, 2026

Two UC faculty and staff members are among this year's Rising Star leadership program sponsored by YWCA Greater Cincinnati. Kelli Beecher, assistant professor in the UC College of Nursing, and Brittany Bibb, assistant director of programs and operations in the UC Division of Student Affairs, are among the emerging leaders of 2026. They were featured in the publication Movers & Makers.