About Us


Dr. Darren Brennan


Dr. Brennan graduated Magna Cum Laude from the National University of Ireland, Galway in 1996 and pursued internal medicine for 3 years before obtaining membership of the Royal College of Physicians of Ireland (equivalent to Board certification in internal medicine). He subsequently did a radiology residency in Ireland and completed Fellowships in musculoskeletal imaging and Interventional Radiology before relocating to the US where he did an abdominal imaging fellowship at Beth Israel Deaconess Medical Center and Harvard Medical School.  From 2006-2015, he served on the faculty at Beth Israel Deaconess Medical Center Boston and as an assistant Professor in Radiology at Harvard Medical School. In January 2015 he transferred to the UMass Memorial Healthcare system where he serves as Vice Chair of Radiology and is an Associate Professor in radiology.

His major research interests include tumor ablation and the use of stereotactic radiosurgery in Body malignancies. He has published over forty peer reviewed papers focused primarily on the assessment and treatment of malignancy. He has extensive experience serving as an independent reviewer for clinical trials and has served as both a primary reader and adjudicator using RECIST, RECIST 1.1, modified RECIST, Cheson, irRC, Volumetric, and Adjuvant criteria. He has worked on multiple successful registry trials including several that have been granted under FDA “Breakthrough status.”

He is board certified in Radiology in Ireland, the UK and the United States and lives in the Boston area.


Precision.  Quality.  Value.