CT Scan

NHRA CT Scan Specialists

Frederick Birnberg, M.D.

Frederick Birnberg, M.D.

Dr. Frederick Birnberg joined NHRA in 1988. He was a former Assistant Professor in the Department of Radiology at the University of Michigan where he received Outstanding Faculty Teacher of the Year Award. Prior to joining Newport Harbor Radiology...

Michael Brant-Zawadzki, M.D., F.A.C.R.

Michael Brant-Zawadzki, M.D., F.A.C.R.

Dr. Michael Brant-Zawadzki joined NHRA in 1986. After his training in Radiology and Neuroradiology at Stanford University Medical Center, Dr. Brant-Zawadzki spent six years on the Neuroradiology faculty at the University of California, San...

Brian Kim, M.D.

Dr. Kim joined NHRA in 2011.  He is a summa cum laude graduate from the University of California and received his medical degree from Stanford University School of Medicine.  Dr. Kim completed his residency at Stanford Hospital and...

Karence Chan, M.D.

Karence Chan, M.D.

Dr. Karence Chan joined NHRA in 1998. Dr. Chan was a Clinical Instructor in the Radiology Department at the University of California, San Diego Medical Center from 1998-2000. Certification American Board of Radiology, 1997...

Miles Chang, M.D.

Miles Chang, M.D.

Dr. Miles Chang joined NHRA in 1995. Currently Dr. Chang is Chief of Radiology Services for Hoag Hospital Irvine and Vice Chairman of Department of Radiology for Hoag Hospitals. Certification American Board of Radiology, 1993...

Mark Chen, M.D.

Mark Chen, M.D.

Dr. Mark Chen joined NHRA in 2001. He is currently the Chief Financial Officer/Secretary for the group. Dr. Chen is an author for STATdx, a diagnostic clinical decision support system. He is also on the volunteer clinical faculty at the University...

Luke Cheung, M.D.

Luke Cheung, M.D.

Dr. Luke Cheung joined NHRA in 2002 and has served as the Medical Director for the outpatient Irvine facilities. Certification American Board of Radiology, 1993 Fellowship Department of Radiology, Body Imaging Stanford...

Iris Choo, M.D.

Iris Choo, M.D.

Dr. Iris Choo joined NHRA in 1993. Dr. Choo received honors with Summa Cum Laude, Alpha Omega Alpha, AMWA Janet M. Glasglow Memorial Award and the University of California, San Francisco Radiology Elmer Ng, M.D. Award. Certification...

Peter Giuliano, M.D.

Peter Giuliano, M.D.

Dr. Peter Giuliano joined NHRA in 2003 and is the Director of the Department of Nuclear Medicine at Hoag. Certification American Board of Radiology, 2002 American Board of Nuclear Medicine, 2003 Fellowship Nuclear Medicine

J. Andrew Keyoung, M.D.

J. Andrew Keyoung, M.D.

Dr. Keyoung joined NHRA in 2008. Prior to NHRA, Dr. Keyoung was a clinical instructor in Department of Radiology at Stanford University School of Medicine. Dr. Keyoung was recently chosen as one of America’s Top Radiologist by Consumers...

Jay Lichman, M.D.

Jay Lichman, M.D.

Dr. Jay Lichman joined NHRA in 1976. He served as Director of the Hoag Breast Imaging Center from 1983-2004. Previously he was Assistant Clinical Professor of Radiology at the University of California, Irvine. Certification American...

John Lieu, M.D.

John Lieu, M.D.

Dr. John Lieu Joined NHRA in 2009. Prior to NHRA, he was a Clinical Instructor in the Department of Radiology at Stanford. Certification American Board of Radiology, 2008 Fellowship MSK and Body Imaging Stanford...

John Lim, M.D.

John Lim, M.D.

Dr. John Lim joined NHRA in 2002. He is currently the Director of Body CT at Hoag Hospital. Certification American Board of Radiology, 2001 Fellowship Body Imaging Stanford University Medical Center Palo Alto, CA...

January Lopez, M.D.

January Lopez, M.D.

Dr. January Lopez joined NHRA in 2010. She graduated Phi Beta Kappa, Summa Cum Laude from UC Berkeley, and received her medical degree from UCLA Medical School, where she served as President of the Alpha Omega Alpha Medical Honor Society, as well...

Binh Nguyen, M.D.

Binh Nguyen, M.D.

Dr. Binh Nguyen joined NHRA in 2010. Certification American Board of Radiology, 2003 Fellowship Interventional Neuroradiology University Texas Southwestern Medical School - Dallas Dallas, TX 2004-2006...

Wallace Peck, M.D., F.A.C.R.

Wallace Peck, M.D., F.A.C.R.

After growing up in Southern California, Wallace Peck, M.D. attended Loyola Marymount University, where he graduated Summa Cum Laude in Bio-Engineering and married his wife; a fellow engineer. He then attended medical school at the UCSD. Dr. Peck...

Richard Rhee, M.D.

Richard Rhee, M.D.

Dr. Richard Rhee joined NHRA in 2003 and is head of physician recruitment. He is a Magna Cum Laude graduate of Yale College and received his medical degree from Harvard Medical School. He completed his residency at the University of California,...

Michael Roossin, M.D.

Michael Roossin, M.D.

Dr. Michael Roossin joined NHRA in 1987. Dr. Roossin is currently the President of Newport Harbor Radiology Associates, Medical Director of Newport Imaging Center, and Director of Ultrasound at Hoag Hospital. Previously, he has been President of...

Richard Taketa, M.D., F.A.C.R.

Richard Taketa, M.D., F.A.C.R.

Dr. Richard Taketa joined NHRA in 1974. Certification American Board of Radiology, 1974 American Board of Nuclear Medicine, 1974 Fellowship Neuroradiology, Cardiovascular and Nuclear Medicine University of California,...

Roger Thomas M.D., F.A.C.R.

Roger Thomas M.D., F.A.C.R.

Dr. Roger Thomas joined NHRA in 1975. Dr. Thomas received honors with Alpha Omega Alpha National Society. He is a Fellow in the American College of Radiology. Certification American Board of Radiology, 1975 Fellowship...

Thuan Tran, M.D.

Thuan Tran, M.D.

Dr. Thuan Tran joined NHRA in 2001. He is currently the Co-Medical Director of Newport Imaging Center and the Medical Director of Hoag Health Center – Aliso Viejo. Certification American Board of Radiology, 1999 Fellowship

William J. Van Dalsem, M.D

William J. Van Dalsem, M.D

Dr. William Van Dalsem joined NHRA in 1998. After finishing his fellowship, he was in private practice with Sacramento Radiology Medical Group from 1992 until early 1998. Dr. Van Dalsem is currently the Medical Director of the Hoag Radiology...

Nicolas von dem Bussche, M.D.

Nicolas von dem Bussche, M.D.

Dr. von dem Bussche graduated Phi Beta Kappa, Magna Cum Laude from UC Berkeley and was elected to the Alpha Omega Alpha Honor Medical Society at UC San Francisco. He was named Chief Resident at UC San Diego. During his fellowship in Abdominal...

Winston Whitney, M.D.

Winston Whitney, M.D.

Dr. Winston Whitney joined NHRA in 1993. Dr. Whitney is currently the Medical Director of Hoag-Huntington Beach Imaging Center and the Medical Director of Hoag Hospital Outpatient Imaging. Certification American Board of Radiology, 1991

Scott Williams, M.D.

Scott Williams, M.D.

Dr. Scott Williams joined NHRA in 2006. Since 2008 he has served as the section Chief of Cardiac Imaging. Special interests include 3D Imaging and Surgical Planning. Certification American Board of Radiology, 2005 Fellowship...

Humberto Wong , M.D.

Humberto Wong , M.D.

Dr. Humberto Wong joined NHRA in 2008. He is an Adjunct Professor of Radiology in the Cardiovascular Imaging section at Stanford University Medical Center. Certification American Board of Radiology, 2007 Fellowship...

Melissa Yu, M.D.

Melissa Yu, M.D.

Dr. Melissa Yu joined NHRA in 2007. Dr. Yu received honors with Alpha Omega Alpha in 1998. Following her training, she held a faculty position as Assistant Clinical Professor in Radiology at San Francisco General Hospital and the University of...