Our Care Team


Keith Meritz, MD

Dr. Keith Meritz grew up in South Jersey and Philadelphia.  He received his medical degree at the Medical College of Pennsylvania, which is now part of Drexel.  He has been practicing Radiation Oncology in the New York metropolitan area for over 30 years, and is now returning to South Jersey.  He has always enjoyed being part of a multidisciplinary team and is honored to be working at Delaware Valley Urology with such a knowledgeable and experienced group of physicians.

William Oresick, MHA, CMD
Administrator & Chief Medical Dosimetrist
Delaware Valley Urology Cancer Treatment Center

William Oresick received his certification by The Medical Dosimetrist Certification Board in 2008 and joined our Cancer Care Team in 2010. With his previous dosimetry experience at Stanly Regional Medical Center in Charlotte, North Carolina and the VA Medical Center in Pittsburgh, Pennsylvania. William brings with him a wealth of experience designing radiation treatment plans, calculating dosages for medical radiation, and ensuring that all our patients are treated with the utmost care and up-to-date planning techniques. He earned his Master of Health Administration through the Gillings School of Global Public Health at the University of North Carolina, Chapel Hill. He is a member of the American Association of Medical Dosimetrists.


Dr. Liang

Liang Song, M.Sc., DABR, DABMP
Medical Physicist

Medical Physicist Liang Song holds a Master’s degree in radiological physics and has been a clinically oriented radiation oncology physicist since 1991. Certified by the American Board of Radiology in Therapeutic Radiological Physics as well as the American Board of Medical Physics in Radiation Oncology Physics, Liang previously directed the implementation of new radiology systems for several area hospitals, including one of the earliest 3D-CRT programs as well as one of the region’s first IMRT programs. To date, Liang has overseen treatment regimens for over 500 prostate cancer patients.


Accredited by the premier credentialing body for radiation oncology, ACR (The American College of Radiology).

The Delaware Valley Urology Cancer Treatment Center
2090 Springdale Rd,
Suite B
Cherry Hill, NJ 08003
P: 856-751-9010

Featuring the Philadelphia area's first RapidArc Radiotherapy suite
Learn More...