Our PHYSICIANS

THE RIGHT
RADIOLOGISTS

for Portland
patients and physicians.

Our Physicians

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.

Deb Arnold Md

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

Maureen Baxter Md

Maureen Baxter, MD

Board-Certified: American Board of Radiology

Fellowship: Oregon Health and Science University, Portland, OR; Women’s Imaging

Residency: Oregon Health and Science University, Portland, OR; Radiology

MD: University of Colorado, Denver, CO

Jon Carnell Md

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

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 Md

Henry Chow, DO

Board Eligible: 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

Mark Gibson Md

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

David Greenberg Md

David Greenberg, MD

Board Certified: American Board of Radiology

Fellowship: University of Utah, Salt Lake City, UT; Oncology Imaging

Residency: University of Tennessee/Memphis, Memphis, TN

MD: Tulane University, New Orleans, LA

Jim Hasenauer Md

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

Hasnain Hasham, MD

Board-Eligible: American Board of Radiology

Fellowship: Dotter Interventional Institute, OHSU

Residency: University of Kansas Medical Center

MD: Creighton University School of Medicine

Ly Huynh Md

Ly Huynh, MD

Board Certified: American Board of Radiology

Fellowship: Oregon Health and Sciences University, Portland, OR; Musculoskeletal Imaging,

Residency: Kaiser Permanente Los Angeles, Los Angeles, CA

MD: Tufts University School of Medicine, Boston, MA

Ronald Kizziar MD

Ronald Kizziar, MD, MPH

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: Loma Linda University School of Medicine, Loma Linda, CA

Rich Koesel Md

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

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

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

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

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

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

Matt Orth Md

Matthew Orth, DO

Board-Certified: American Board of Radiology

Residency: Ohio State University Medical Center, Columbus, OH; Radiology,

DO: Kirksville College of Osteopathic Medicine, Kirksville, MO

Sarah Rogers Md

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

Piper Rooke Md

Piper Rooke, MD

Board Certified: American Board of Radiology

Fellowship: Mayo Clinic, Cross-Sectional Imaging, Jacksonville, FL

Residency: University of Florida College of Medicine, Gainesville, FL

MD: University of Florida College of Medicine, Gainesville, FL

Carmen Timberlake Md

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

Jim Tsai Md

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

Rick Vigran Md

Richard Vigran, MD

Board-Certified: American Board of Radiology

Fellowship: St. Mary’s Medical Center, Long Beach, CA; Interventional Radiology, Computed Tomography, Interventional Ultrasound

Residency: St. Mary's Medical Center, Long Beach, CA; Radiology

MD: University of California at Irvine School of Medicine, Irvine, CA

Stacy Yamasaki Md

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