RIA Interventional Oncology Treatment Radiologists
Charles W. Nutting, D.O.
Interventional Radiologist
Dr. Nutting is a board certified, fellowship trained interventional radiologist. He specializes in performing minimally invasive image guided cancer procedures. Dr Nutting was the first physician in the United States to perform liver radioembolization with Sirsphere. He has published numerous papers, given invited lectures world wide and has personally performed over 400 radioembolizations.
Benjamin E. Kassanoff , M.D.
Interventional Radiologist
Dr. Kassanoff is a board certified, fellowship trained interventional radiologist. Originally in practice in Dallas, Texas, Dr. Kassanoff has worked in the south Dever area since 2005. He has over 10 years of experience in interventional
and vascular disease including complex embolizations, vascular access, and multimodality image-guided interventions.
Brooke Spencer , M.D.
Interventional Radiologist
Dr. Spencer is a board certified, fellowship trained Interventional Radiologist. She practiced in Phoenix Arizona from 2001-2009 where she developed the minimally invasive cancer program and joined the RIA team in Denver in the summer of 2009. Her experience includes both regional therapy with radioembolization and chemoembolization of the liver, as well as local therapies including radiofrequency ablation, cryoablation and microwave ablation of tumors in the liver, lung, kidneys and bone. She has been an invited speaker on cancer therapies and program development at national meetings.

