CCU Inc has been providing premiere-quality cardiovascular services since 2002. Employing superior Certified Sonographers, credentialed in Ultrasound of the Heart, the Vasculature, and the Soft Tissues, as well as M.D. interpreters with board certification and years of experience, CCU Inc contributes to medical excellence in the Greater Boston area, including hospitalized patients, outpatients in physicians’ offices, and home-bound patients. By rendering services directly in patients’ homes, the expense and discomfort of transporting such patients to an office setting is avoided.
Printed reports of findings are generated promptly, and are transmitted electronically to the ordering physicians’ offices. In the rare case of a critical finding, an immediate report is called to the ordering physician.

CCU Inc stands ready to expertly provide imaging services to your patients, with the capacity to nimbly schedule services quickly and efficiently.


Brendan Carroll, MM, RDCS – Chief Operating Officer

Brendan Carroll has over 30 years of cardiac, vascular and pulmonary diagnostic testing experience in locations in both Europe and the U.S. In 1988, he was recruited from Ireland to manage the Noninvasive Cardiac Lab at the world-renowned Spaulding Rehab Hospital. Two years later he assumed similar duties at The Cambridge Hospital in Cambridge, MA, a Harvard Medical School teaching facility.

In 2004, his management expertise was recognized via his appointment as Senior Director of Operations for the Cardiovascular, Respiratory, and EEG Departments for Cambridge Health Alliance – a network of three community hospitals (Cambridge, Somerville, and Whidden Hospitals).

Brendan holds a Master’s Degree in Management, with a focus on healthcare, from Cambridge College. He is a Registered Diagnostic Cardiac Sonographer and is a current member of: THE American Society of Echocardiography and Society of Diagnostic Medical Sonographers. Brendan is also as an accomplished Irish Tenor with three CD recordings to date.

Thomas Risser MD: Chief Cardiologist

Dr. Risser has enjoyed a remarkable medical career in both the military and private sector. He attended Pennsylvania State University College of Medicine and completed his residency at the Cornell Cooperating Hospitals in New York City. After 3 years of active duty as a Flight Surgeon in the U.S. Navy, Dr. Risser moved to Boston to serve 2 years of Clinical Cardiology Fellowship at the Boston Beth Israel Hospital, followed by one year of a Research Cardiology Fellowship at the Brigham & Women’s Hospital in Boston.  He has served as a clinical cardiologist at Cambridge Health Alliance, Mount Auburn Hospital, and Spaulding Rehab Hospital of Cambridge from 1981 to the present.

Dr. Risser is board-certified in Internal Medicine and Cardiovascular Disease.  He holds a Certificate of Advanced Competency in Adult Echocardiography from the ASE, and a Certificate of Special Competency in Cardiac Pacing and Defibrillation from the Heart Rhythm Society.  

Dr. Risser is a fellow of the American College of Physicians, American College of Cardiology, and American Society of Echocardiography.  Currently, Dr. Risser is the Medical Director for Noninvasive Cardiac Diagnostic Labs at The Cambridge Health Alliance and is an Assistant Professor of Medicine at Harvard Medical School.

After 37 years of service in the Medical Corps of the U.S. Navy, Dr. Risser retired as a decorated Captain in 2013.  He saw service on 8 aircraft carriers, 25 countries and territories, on 6 continents, as well as 20 of the U.S. states.  CAPT Risser deployed to Fallujah, Iraq with his Marine Corps unit 2005-2006.  He later served as Assistant Deputy Medical Officer to the Marine Corps, based in the Pentagon.  Based on his experience in Iraq, Dr. Risser authored the novel, “Naked Treason”, available through multiple on-line vendors.” Beyond his military and cardiology duties, Dr. Risser is a Senior Aviation Medical Examiner for the Federal Aviation Administration. Dr. Risser was recently designated a “Top Doc” in Boston Magazine’s Dec 2017 edition.