Our Team

Our facilityis staffed with a dedicated team of professionals who collaborate to deliver truly patient-centered care. Physicians, caregivers and administrative staff alike are committed to making your experience the best it can be. Learn more about our radiologists, below:


Derek Burdeny, MD
Dr. Derek Burdeny received his medical degree and did his Radiology Residency at the University of Manitoba Faculty of Medicine. He did a fellowship in MRI at the University of North Carolina and has specialized in musculoskeletal imaging since 1989. Past academic appointments have included Assistant Clinical Professor and Chairman of Radiology at the University of South Dakota. He is the Director of Radiology at the Nebraska Orthopedic Hospital in Omaha and serves as the imaging consultant for a number of collegiate and professional sports teams.

Jana Crain, MD
Dr. Jana Crain received her medical degree and completed her residency at the University of Arkansas Center for Medical Sciences. She completed her fellowship in musculoskeletal imaging with National Orthopedic Imaging Associates, after which she joined NOIA. She currently serves as Medical Director of a number of imaging centers in the San Francisco Bay Area and Colorado, and is a consultant for both collegiate and professional players and teams.

William DeMartini, MD
Dr. William DeMartini received his medical degree from Chicago Medical School where he was elected to the AOA Honor Medical Society. He did his radiology residency and additional fellowship in CT and Ultrasound at the University of California, San Francisco. Dr DeMartini has been practicing radiology in Marin County for 33 years and is past president of the Marin Medical Society and past president of the California Radiological Society. He is a Fellow of the American College of Radiology and serves as Northern California Councilor in the American College of Radiology. Dr DeMartini has Subspecialty Certification in Vascular and Interventional Radiology and is a Clinical Professor in Radiology at the University of California, San Francisco. He is currently chief of the Department of Medical Imaging at Sonoma Valley Hospital.

Russell Fritz, MD
Dr. Russell Fritz received his medical degree from Duke University School of Medicine and then did his radiology residency and a fellowship in musculoskeletal imaging at the University of California, San Francisco. As a NOIA member since 1991, Dr. Fritz served as an imaging consultant to the 1992 Summer Olympic Games in Barcelona, Spain. He has been a visiting professor and lectured extensively to orthopedic surgeons, radiologists, and other physicians around the United States and in 14 countries. Dr. Fritz has written numerous articles and book chapters on orthopedic MRI. He has been an imaging consultant to a number of high-profile sports organizations, including the San Francisco 49ers, Denver Broncos, Colorado Rockies, Oakland A’s, San Francisco Giants, Cleveland Indians and the US Ski Team.

Donna Hoghooghi, MD
Dr. Donna Hoghooghi earned her medical degree at the University of California, San Francisco School of Medicine. She completed both her radiology residency and neuroradiology fellowship at UCSF where she served as Chief Resident in the Department of Radiology. In 2003, she was certified by the American Board of Radiology and earned a Certificate of Added Qualification in neuroradiology in 2005. She has presented at the annual meeting of the American Society of Neuroradiology and has served as a peer reviewer for the American Journal of Neuroradiology. Dr. Hoghooghi is a member of the American Society of Head and Neck Radiology, the Radiological Society of North America, and the American College of Radiology. She is a senior member of the American Society of Neuroradiology and the past president of the UCSF Medical Alumni Association, and UCSF Margulis Radiology Society.

Betsy Holland, MD
Dr. Betsy Holland received her medical degree from Cornell and did her residency and fellowship in Neuroradiology at the University of California, San Francisco. She is a Senior Member of the American Society of Neuroradiology and holds a certificate of added qualification in neuroradiology. Dr. Holland was a founding member of NOIA and serves as the director of neuroradiology. She has published numerous articles and book chapters and has lectured widely on MRI. She has been a pioneer in developing web-based musculoskeletal imaging educational programs.

Jay Kaiser, MD
Dr. Jay Kaiser received his medical degree from Washington University in St. Louis and did his post graduate radiology residency at the University of California, San Francisco. Dr. Kaiser founded NOIA in 1989. Specializing in spinal imaging, he has written and lectured extensively on imaging of the degenerative spine. Dr. Kaiser was a founding member of the North American Spine Society and currently serves on the Associate Editorial Board of the Journal Spine. He teaches in both the Orthopedic and Radiology departments at the University of California, San Francisco, and also serves on the National Advisory Council of Washington University School of Medicine.

Ralph Koenker, MD
Dr. Ralph Koenker received his medical degree from the University of California at San Diego. His residency training took place at Massachusettes General Hospital, Harvard Medical school. He subsequently performed a fellowship in Interventional Radiology at the University of California, San Francisco. In addition to his board certification in Diagnostic Radiology he holds Certificates of Additional Qualification (CAQs) in Interventional Radiology and Neuroradiology. He has used this background to provide thoughtful Interventional and Neuroradiology consultation with particular expertise in vascular diseases of the central nervous system. Dr. Koenker has a special interest in Computers and Radiology and has been instrumental in transitioning North Bay facilities to digital format and Picture Archiving and Communication Systems (PACS). Dr. Koenker has served as Medical Director of the Imaging Department at Novato Community Hospital (NCH) since 2001. Additionally he ha served in numerous leadership positions at NCH including Chief of Staff.

Philip Kurzman, MD
Dr. Philip Kurzman received his medical degree from the University of California, San Francisco School of Medicine. Following his residency training in radiology at the University of Chicago Medical Center, he completed a fellowship in vascular & interventional radiology at Yale-New Haven Hospital in New Haven, Connecticut. Dr. Kurzman is board-certified in both diagnostic radiology and vascular & interventional radiology. He is a member of the Society of Interventional Radiology and the American College of Radiology. Dr. Kurzman’s special clinical interests include minimally invasive oncological interventions and uterine fibroid embolization.

Kelly Lindauer, MD
Dr. Kelly Lindauer received his medical degree and completed his residency at the Duke University. He completed his fellowship in musculoskeletal imaging with National Orthopedic Imaging Associates. After fellowship he joined Diversified Radiology in his home state of Colorado. While at Diversified Radiology, Dr. Lindauer served as the musculoskeletal Division Chief, a member of the Board of Directors, medical director for several imaging centers and hospitals, and as Director of Diversified Radiology’s musculoskeletal fellowship program. Dr. Lindauer joined National Orthopedic Imaging Associates in 2016, and is the lead radiologist for NOIA’s Denver practice. He is a consultant for both collegiate and professional athletic teams.

Natalya Lvoff, MD
Dr. Natalya Lvoff received her medical degree from Northwestern University Medical School, where she was elected to Alpha Omega Alpha National Medical Honor Society, and was an Albert Schweitzer Fellow. She completed her residency training in Diagnostic Radiology and a fellowship in Breast Imaging at UCSF in 2008. She then joined CAIMA as a staff radiologist, where she pioneered the use of MRI guided breast biopsy at Marin General Hospital. Dr. Lvoff is involved in research, and has published multiple articles, presented at numerous national Radiology conferences, and has served as a representative of the Mammography Education Task Force for the American College of Radiology. She serves as the Director of Medical Imaging at Kentfield Rehabilitation Center.

Adam Nevitt, MD
Dr. Adam Nevitt graduated AOA from Rush Medical College in Chicago before completing his Diagnostic Radiology Residency at Virginia Mason Medical Center in Seattle. He completed his fellowship in Vascular and Interventional Radiology at UCSF. Before joining the North Bay Division, Dr. Nevitt practiced at Seton Medical Center where he served as the Director of Interventional Radiology and subsequently Chief of Radiology. Dr. Nevitt has performed over 20,000 interventional procedures over 14 years of practice. At Marin General Hospital, Dr Nevitt formed a team that performed the first 90 radioembolization procedure for treatment of malignant liver tumors; The program has grown and is one of the most active private practices in Northern California. Dr. Nevitt enjoys all aspects of Interventional medicine including the treatment of peripheral vascular disease, dialysis access maintenance, vascular access and stroke.

Dennis Orwig, MD
Dr. Dennis Orwig received his medical degree from the University of California San Francisco graduating with admission to the AOA honor society. He continued at UCSF with internship in Internal Medicine, residency in Diagnostic Radiology and Fellowship training in body imaging (Ultrasound, CT and MRI). He authored several articles in peer review journals and has presented at National Radiology meetings. Dr Orwig has served as the Medical Director of Imaging services, and Chief of the Department of Medical Imaging at Marin General Hospital almost continuously since 1995. He serves on a number of medically related Boards In Marin County including the Board of Directors of Meritage Medical Network and Marin Medical Practice Concepts. Dr. Orwig has a special interest in Ultrasound and the use of imaging in guidance of procedures.

Jean-Pierre Phan Cao Phai
Dr. Jean-Pierre Phan Cao Phai received his medical degree and MBA from Tufts University in Boston, Ma. Following his radiology residency at McGill University in Montreal, Quebec, he completed his fellowship in musculoskeletal imaging with National Orthopedic Imaging, and then joined NOIA as a staff radiologist. Dr. Phancao specializes in imaging of peripheral joints and interventional musculoskeletal procedures.

Janaki Ramanathan, MD
Dr. Janaki Ramanathan received her medical from the University of Texas, Galveston, and did her residency at the University of Texas Southwestern Medical Center in Dallas. Following her fellowship in musculoskeletal imaging with NOIA in 2004, she went on to gain experience in multidisciplinary approaches to radiology from 2004-2007 and then returned to NOIA as a staff radiologist.

Damon Sacco, MD
Dr. Damon Sacco received his medical degree from Loyola-Stritch School of Medicine and did his residency and musculoskeletal training at Case Western Reserve University in Cleveland, Ohio, where he went on to hold the position of Assistant Professor. He joined NOIA in 1989 and is medical director of a number of imaging centers. He also serves as NOIA’s director of musculoskeletal interventional radiology.

Eric Smith, MD
Dr. Eric Smith received his medical degree from Dartmouth College where he was active in the development of cartilage imaging. He further developed his interest in Orthopedic Imaging during his residency under the tutelage of Dr. Donald Resnick at the University of California San Diego. He completed a fellowship with NOIA and has been a staff radiologist since that time. Dr. Smith has a particular interest in imaging of arthropathies and musculoskeletal manifestations of systemic disease.

Robert Wirth, MD
Dr. Robert Wirth received his medical degree from Columbia University in New York City. He subsequently completed his Radiology residency at Stanford University. This was followed by a fellowship in body imaging also at Stanford University (including Ultrasound, Computed Tomography and Magnetic Resonance Imaging). Since completing his training he has worked as a general radiologist with California Advanced Imaging Medical Associates. Dr. Wirth is an important member of the imaging departments at all of our hospital practices as well as a key member of the breast imaging team at the Breast Diagnostic Center of Marin in Greenbrae.