Justin Visak

Justin Visak is an Assistant Professor in the Department of Radiation Oncology at the University of Texas Southwestern Medical Center, where he works in the Division of Medical Physics and Engineering. He earned his bachelor’s, master’s, and Ph.D. from the University of Kentucky before completing a medical physics residency at UT Southwestern.

Education:

• B.Sc., University of Kentucky
• M.Sc., University of Kentucky
• Ph.D., University of Kentucky
• Medical Physics Residency, UT Southwestern

Dr. Visak specializes in adaptive radiotherapy, particularly using Ethos and Unity systems, and develops novel treatment planning technologies to enhance precision in radiation oncology. His research focuses on integrating artificial intelligence and automation to improve clinical efficiency and safety.

Recent publications highlight his work on:

• Deep-learning dose prediction for adaptive radiotherapy
• X-ray and MR-guided treatment planning
• Quality assurance protocols for online adaptive workflows
• Optimization of stereotactic ablative radiotherapy (SAbR) for lung, breast, and spine cancers

He contributes to clinical validation studies for advanced radiotherapy systems like Halcyon Linac, Ethos, and MR-Linac platforms, emphasizing reduced margins, motion management, and dosimetric accuracy.

Affiliations:

• Division of Medical Physics and Engineering, UT Southwestern