Management

Jonathan Stephenson, MD received his Bachelor of Science and graduated Summa Cum Laude from the University of Richmond in Richmond, Virginia.  He received his Doctor of Medicine from Eastern Virginia Medical School in Norfolk, VA.  Dr. Stephenson completed his transitional year residency at Riverside Regional Medical Center in Newport News, VA, and his residency in diagnostic radiology at Pennsylvania State University Milton S. Hershey Medical Center in Hershey, PA. He conducted his fellowship in cross sectional imaging and women’s imaging at Brown University Rhode Island Hospital in Providence, RI.

Dr. Stephenson joined Quantum in 2007 as a diagnostic radiologist with subspecialty interests in women’s imaging and abdominal imaging.  He is currently Quantum’s body imaging section chief and has served on the finance and operations committees.  He is also the current director of CT and MRI in UPMC Central Division. Since 2011 he has served as the radiology department chairman for Pinnacle Health Hospitals and subsequently the UPMC Central Division. His leadership has been integral to the delivery of radiology services in Harrisburg, PA, and the surrounding communities. In 2023 Dr. Stephenson was elected President of Quantum Imaging and Therapeutic Associates and chair of the Board of Directors.

Ben Slater joined Quantum in 2018 as Chief Product and Strategy Officer. In this role he was responsible for supporting a broad range of corporate operations including health system contracting, business development, marketing, and strategic initiatives. In addition to these functions, he has served as Quantum’s Compliance Officer since 2022.

Prior to joining Quantum, Slater led the development and commercialization of a radiology focused business intelligence product line from within a large global medical imaging software and device manufacturer. He possesses a strong background in corporate development, data analytics, and business process improvement.

He has held progressive leadership roles in the medical imaging industry for over 15 years. As a member of Quantum’s executive team, he has worked closely with its Board of Directors in all areas of corporate governance. Slater was selected to serve as Quantum’s CEO in September of 2024.

Tammy joined Quantum in 2011. She is responsible for the financial operations, including financial analysis, reporting, and budgeting.

Cristy joined Quantum in 2001. She is responsible for all clinical operations including physician scheduling and credentialing. She is also responsible for the radiology support team and the teleradiology business.