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Dr. William Van Dalsem joined NHRA in 1998. After finishing his fellowship, he was initially in private practice with Sacramento Radiology Medical Group from 1992 until early 1998 before transitioning to Orange County. Abdominal and Thoracic MRI was his research focus at Stanford University School of Medicine during his Body Imaging fellowship. He served as Chief Resident for Diagnostic Radiology during his final year of his diagnostic radiology residency at UC San Francisco from1987-92. During his junior year at University of Southern California Medical School, he was elected to the Alpha Omega Alpha Honor Medical Society. At Stanford, he was Bar Manager for Sigma Alpha Epsilon fraternity from 1980-1981.

His current areas of focus include thoracic, abdominal and pelvic cross sectional imaging, including advance prostate imaging, as well as nonvascular interventional radiology.

In addition to his radiology duties, Dr. Van Dalsem previously served as Chairman and Medical Director of the Hoag Radiology Department and was a member of the NHRA Executive Committee. He was also an elected Member-At-Large of Hoag Medical Staff’s Executive Committee from 2006-2009. He has been a member on Hoag’s Clinical Information Technology Governance Committee and Health Information Exchange Clinical Design Team.

Dr. Van Dalsem serves as Medical Director of Diagnostic Imaging with NHRA.