OUR PROVIDERS
THE RIGHT
RADIOLOGISTS & PA'S
for Portland
patients and physicians.
Our Providers
RSN has earned its reputation as the clear choice for Portland patients, owing to our exceptional care and excellent customer service. We have access to the full spectrum of medical imaging modalities, and our board-certified radiologists— many of whom have completed subspecialty fellowship training—provide complete and accurate reports promptly. Our radiologists work with our highly skilled medical staff to provide both patients and referring physicians with individualized attention and service.
RSN radiologists have held distinguished positions at prominent medical schools and institutions. They have conducted groundbreaking research and authored numerous articles and abstracts. Many RSN physicians are also active participants in organizations such as the American College of Radiology, Radiological Society of North America, Society of Interventional Radiology, and American Roentgen Ray Society.
To learn more about each member of our medical team, please click on the physicians’ names below.
Deborah Arnold, MD
Board-Certified: American Board of Radiology
Residency: Oregon Health and Science University, Portland, OR; Radiology
MD: University of Washington School of Medicine, Seattle, WA
Amanda Beer, MD
Board-Certified: American Board of Radiology
Fellowship: University of Virginia Health System; Breast Imaging
Residency: University of Virginia Health System
MD: University of North Carolina School of Medicine
Alexander Boscanin, MD
Board Eligible: American Board of Radiology
Fellowship: Dotter Interventional Institute, Oregon Health and Science University, Interventional Radiology
Residency: Oregon Health and Science University
MD: Loma Linda University School of Medicine, Loma Linda CA
Jonathan Carnell, MD
Board Certified: American Board of Radiology
Fellowship: University of WA Medical Center, Seattle, WA; Body Imaging
Residency: Loyola University Medical Center, Maywood, IL
MD: University of Kansas School of Medicine, Kansas City, KS
David Cheng, MD
Board Certified: American Board of Radiology
Fellowship: Dotter Interventional Institute, Oregon Health & Science University, Portland, OR; Interventional Radiology
Residency: Oregon Health Sciences University, Portland, OR
MD: Medical College, GA
Henry Chow, DO
Board Certified: American Board of Radiology
Fellowship: UCSF, San Francisco, CA; Abdominal Imaging
Residency: Norwalk Hospital, Norwalk, CT
MD: Touro University, College of Osteopathic Medicine, Vallejo, CA
Charles Croteau, DO
Board-Certified: American Board of Radiology
Fellowship: The Ohio State University Wexner Medical Center; Neuroradiology
Residency: Michigan State University College of Osteopathic Medicine
DO: University of Health Sciences College of Osteopathic Medicine
Yan Gao, MD
Board-Certified: American Board of Radiology
Fellowship: University of Virginia, Charlottesville, VA; Body Imaging
Residency: Methodist Hospitals in Memphis, University of Tennessee, TN; Radiology
MD: Shanxi Medical College, Taiyuan City, Shanxi Province P.R. China
Mark Gibson, MD
Board-Certified: American Board of Radiology
Fellowship: Dotter Interventional Institute, Oregon Health & Science University, Portland, OR; Interventional Radiology
Residency: Eastern Virginia Medical School, Norfolk, VA; Radiology
MD: Indiana University School of Medicine, Indianapolis, IN
Lorraine Gohman, PA-C
Bachelor of Science: Winona State University, Winona, MN
Master of Science in Physician Assistant Studies: Central Michigan University, Mount Pleasant, MI
James Hasenauer, MD
Board-Certified: American Board of Radiology
Fellowship: University of Alabama, Birmingham, AL; Musculoskeletal Radiology
Residency: Detroit Medical Center, Wayne State University School of Medicine, Detroit, MI; Radiology
MD: Saint George’s University, Grenada, West Indies
Hasnain Hasham, MD
Board-Certified: American Board of Radiology
Fellowship: Dotter Interventional Institute, OHSU
Residency: University of Kansas Medical Center
MD: Creighton University School of Medicine
Andrew Johnson, PA-C
Bachelor of Science: Portland State University, Portland, OR
Master of Science in Physician Assistant Studies: Oregon Health and Science University, Portland, OR
Richard Koesel, MD
Board-Certified: American Board of Radiology
Fellowship: Oregon Health and Science University, Portland, OR; Neuroradiology
Residency: Oregon Health and Science University, Portland, OR; Radiology,
MD: Albert Einstein College of Medicine, Bronx, NY
Lyudmila Morozova, MD
Fellowship: Oregon Health Science University; Cardiothoracic Radiology
Residency: Diagnostic Radiology, Oregon Health Science University
MD: Oregon Health Science University, Portland, OR
Brian Mumford, MD
Board Certified: American Board of Radiology
Fellowship: Oregon Health Science University, Portland, OR; Neuroradiology
Residency: Oregon Health Science University, Portland, OR; Radiology
MD: University of Utah, Salt Lake City, UT
Mikhail Nekhline, MD
Board-Certified: American Board of Radiology
Fellowship: Johns Hopkins University, Baltimore, MD; Cross Sectional Body Imaging
Residency: Henry Ford Hospital, Detroit, MI; Diagnostic Radiology
MD: Oregon Health and Science University School of Medicine, Portland, OR
Michael Neuman, MD
Board-Certified: American Board of Radiology
Residency: Michael Reese Hospital and Medical Center, Chicago, IL; Radiology
MD: University of Wisconsin Medical School, Madison, WI
Hayley Oligane, DO
Board certified: American Board of Radiology
Fellowship: University of Pittsburgh Medical Center, Women’s Imaging
Residency: University of Pittsburgh Medical Center
DO: Nova Southwest University
Sarah Rogers, MD
Board Certified: American Board of Radiology
Fellowship: Oregon Health and Science University, Portland, OR; Neuroradiology
Residency: Oregon Health and Science University, Portland, OR
MD: Oregon Health and Science University, Portland, OR
J. Carmen Timberlake, MD
Board-Certified: American Board of Radiology
Fellowship: University of Rochester Medical Center, Rochester, NY; Musculoskeletal Radiology
Residency: University of Rochester Medical Center, Rochester, NY; Radiology
MD: University of North Carolina School of Medicine at Chapel Hill, Chapel Hill, NC
James Tsai, MD
Board-Certified: American Board of Radiology
Fellowship: University of California at Los Angeles — Los Angeles Medical Center, Los Angeles, CA; Neuroradiology
Residency: University of California at Los Angeles — Los Angeles Medical Center, Los Angeles, CA; Radiology
MD: Ohio State University College of Medicine, Columbus, OH
Jenny Wang, DO
Board-Certified: American Board of Radiology
Fellowship: Henry Ford Health System; Breast Imaging & Body Imaging
Residency: Michigan State University Department of Radiology McLaren-Oakland Medical Center
DO: Western University of Health Sciences
Stacy Yamasaki, MD
Board-Certified: American Board of Radiology
Fellowship: University of Michigan Department of Radiology, University Hospitals, Ann Arbor, MI; Computed Tomography, Magnetic Resonance Imaging, Ultrasound
Residency: University of Texas Health Science Center, Houston, TX; Radiology
MD: State University of New York at Stony Brook School of Medicine, Health Sciences Center, Stony Brook, NY