Our People

Our state-of-the-art equipment is just one part of the equation. The other is our highly specialized imaging team. From accredited technologists to specialized radiologists, we are dedicated to providing you with a team that is attentive, supportive, professional and exceptionally skilled at interpreting the images that result from your scan.

Physicians

Ashley Buice, MD

Ashley Buice, MD

Body Imaging, Nuclear Medicine
Dr. Ashley Buice, our newest body radiologist, originally hails from Atlanta, where she grew up and went to school – and although she has deep roots in the South, she is thrilled to call Eugene home. After educational training with the group, she was “wowed” by the caliber of professionalism at OIC and decided to stay. When asked, Dr. Buice beams “It’s been a really great start to my career and every day I’m really impressed by the group.” She loves the work life balance she has found in her new home, whether its providing diagnostic or interventional imaging services, or just spending time enjoying the outdoors with her dogs.  
Dariusz Zawierucha, MD

Dariusz Zawierucha, MD

Vascular, Interventional

Dr. Dariusz Zawierucha specializes in Vascular and Interventional radiology. He did his medical training at Stanford Medical School and completed his residency there in diagnostic radiology and fellowship in interventional radiology. Dr. Zawierucha joined Radiology Associates in October 2010.

Erik Young, MD, Ph.D.

Erik Young, MD, Ph.D.

Body Imaging

Dr. Erik Young specializes in Body Imaging. He has a doctorate in theoretical physics besides his medical degree from the University of Arkansas, where he also served his residency training. He did a radiology fellowship in body imaging at the University of California. Dr. Young joined Radiology Associates in July 2008.

Paul Wilson, MD

Paul Wilson, MD

Vascular, Interventional

Dr. Paul Wilson specializes in Vascular and Interventional radiology. He received his medical training in Portland at the former University of Oregon Medical School – now Oregon Health and Science University. After medical school he completed a fellowship program at University of California, San Diego, in ultrasound, CT and angiography. Dr. Wilson has been instrumental in developing interventional and angioplasty services in the Northwest. He joined Radiology Associates in July 1979.

David Tsai, MD

David Tsai, MD

Musculoskeletal, Trauma

Dr. David Tsai specializes in Musculoskeletal and Trauma radiology. He received his medical degree from the University of Missouri-Kansas City. He trained in diagnostic radiology at the University of Miami/Jackson Memorial Medical Center. Dr. Tsai completed his fellowship training at Washington University’s Mallinckrodt Institute of Radiology in musculoskeletal imaging. He also completed a second fellowship at University of Washington, Harborview Medical Center in Trauma and Emergency Imaging. Dr. Tsai joined Radiology Associates in July 2005.

 

Stephan Thiede, MD

Stephan Thiede, MD

Neuroradiology

Dr. Stephan Thiede specializes in Neuroradiology. He received his medical degree and completed a radiology residency at the University of North Carolina, Chapel Hill. He also completed a two-year neuroradiology fellowship at the University of Utah. Dr. Thiede joined Radiology Associates in July 2005.

 

Jonathan Sims, MD, MBA

Jonathan Sims, MD, MBA

Women’s Imaging, Musculoskeletal

Dr. Jonathan Sims specializes in Women’s Imaging and Musculoskeletal radiology. He received his medical degree and MBA from the University of South Florida, where he also completed his residency and internship. In 2007, he completed his fellowship in musculoskeletal MRI. Dr. Sims joined Radiology Associates in July of 2008.

 

Jeff Anderson, MD, Ph.D.

Jeff Anderson, MD, Ph.D.

Neuroradiology

Jeff Anderson, MD, Ph.D., studied abstract mathematics and neuroscience at Northwestern University before completing residency and fellowship in neuroradiology at the University of Utah. Until joining Radiology Associates, he was a tenured Professor of Radiology and Bioengineering at the University of Utah where he was an attending neuroradiologist, Director of Functional Neuroimaging, and Principal Investigator of the Brain Network Laboratory. He is author of more than 100 peer-reviewed journal articles investigating the network organization of the brain in neurological and neurodevelopmental disorders, the neuroscience of religion and meditation, and the neuroscience of personality, including publications in Science, Nature Neuroscience, Neuron, and Proceedings of the National Academy of Sciences.

Alex Schabel, MD

Alex Schabel, MD

Neuroradiology

Dr. Alex Schabel specializes in Neuroradiology. He earned his medical degree from the University of Wisconsin in 2006 and completed an internship in general surgery at the University of Washington and a radiology residency and neuroradiology fellowship at the University of Utah. Dr. Schabel joined Radiology Associates in July 2013.

Marius Pakalniskis, MD

Marius Pakalniskis, MD

Musculoskeletal, Women’s Imaging

Dr. Marius Pakalniskis specializes in Musculoskeletal Imaging and Women’s Imaging. He studied medicine at Dartmouth’s Geisel School of Medicine in New Hampshire and did an internship at Resurrection Medical Center in Chicago, a residency at University of Iowa Hospitals and Clinics in Iowa City, and a fellowship in musculoskeletal imaging at the University of Washington Medical Center in Seattle. Dr. Pakalniskis joined Radiology Associates in July 2016.

 

Corey Orton, MD

Corey Orton, MD

Body Imaging and Interventional

Dr. Corey specializes in Body Imaging and Interventional radiology. He attended college and medical school at Emory University. He completed his residency at the University of Mississippi Medical Center in Jackson, and then returned to Emory for a fellowship in abdominal imaging. Dr. Orton started work at Oregon Imaging Centers in July 2016.

 

Brandon Roller, MD, Ph.D.

Brandon Roller, MD, Ph.D.

Musculoskeletal

Dr. Brandon Roller specializes in Musculoskeletal Radiology. He received his medical degree and a Doctorate in Pathobiology from the University of Missouri. His postgraduate training in diagnostic radiology and fellowship was completed at Wake Forest School of Medicine. Additionally, he has worked in the field of orthobiologic product development and continues to consult for companies within the orthopedic industry. Dr. Roller joined Radiology Associates in July 2020.

Bernie Isuani, MD

Bernie Isuani, MD

Vascular, Interventional

Dr. Bernie Isuani specializes in Vascular and Interventional radiology. He received his medical degree from the University of Texas and completed his radiology residency at Vanderbilt University Medical Center in Nashville, Tennessee. He received an additional year of training in vascular and interventional radiology at the University of Utah. Dr. Isuani joined Radiology Associates in December 2004.

Jerrell Ingalls, MD

Jerrell Ingalls, MD

Musculoskeletal, Women’s Imaging

Dr. Jerrell Ingalls specializes in Musculoskeletal and also works in Women’s Imaging. He did his undergraduate work at Louisiana State University and went to medical school at Baylor College of Medicine in Houston, Texas. He completed his residency at Michigan State University and a fellowship at the University of Cincinnati. Dr. Ingalls joined Radiology Associates in August 2015.

 

Ryan Tade, MD

Ryan Tade, MD

Neuroradiology

Dr. Ryan Tade specializes in Neuroradiology. He received both his medical degree and Master of Science in Clinical Anatomy from Creighton University in Omaha, NE. He completed his residency in Diagnostic Radiology and Fellowship in Neuroradiology at Emory University in Atlanta, GA. Dr. Tade joined Radiology Associates in July 2020.

Akshay Gupta, MD

Akshay Gupta, MD

Neuroradiology

Dr. Akshay Gupta specializes in Neuroradiology. He completed his undergraduate education at Duke University and medical education at Louisiana State University. After residency at Tulane University he completed a two-year neuroradiology fellowship at the University of Utah. Dr. Gupta joined Radiology Associates in July 2005.

 

Donald Garbett, MD

Donald Garbett, MD

Vascular, Interventional

Dr. Donald Garbett specializes in Vascular and Interventional radiology. He studied medicine at University of Illinois in Chicago. He completed his Radiology residency at Aurora St. Luke’s in Milwaukee and topped off his preparations with a fellowship in Vascular Interventional Radiology at Indiana University. Dr. Garbett joined Radiology Associates in February 2017.

 

John Dohrman, MD

John Dohrman, MD

Nuclear Imaging

Dr. John Dohrman specializes in Nuclear Imaging. He graduated from the University of Iowa Medical School in 2002. He completed his radiology residency at Indiana University Medical Center, where he also completed a fellowship in nuclear medicine. Dr. Dohrman joined Radiology Associates in July 2008.

 

Jon Ekstrom, MD

Jon Ekstrom, MD

Women’s Imaging, Musculoskeletal, Pediatrics

Dr. Jon Ekstrom specializes in Women’s Imaging, Musculoskeletal and Pediatric radiology. He studied medicine at Oregon Health Sciences University in Portland. He had a fellowship at the University of Washington, specializing in MRI, CT and ultrasound. Dr. Ekstrom also completed a Pediatric Radiology residency at University of Colorado in Denver. Dr. Ekstrom joined Radiology Associates in July 1989.

 

Physician Assistants

Alex Andersen, PA-C

Alex Andersen, PA-C

Physician Assistant

Alex was born in Sweden and spent the first decade of his life there.  He then moved to the US and lived in the Boston area before making his way westward. Alex initially worked as an emergency room charge nurse in St. Louis before earning his Physician Assistant credentials at OHSU in Portland, OR. He decided to pursue the PA profession so he could work in a procedural specialty. He feels that working in Interventional Radiology for Radiology Associates has been an incredibly good fit for him because he is able to utilize his skillset and interests in detail oriented work.

Alex moved to Eugene with his partner Sonja, who is also a PA. In his free time, he likes to find recipes to make new and delicious food, as well as keep up his Scandinavian home cooking skills.

Alex and Sonja enjoy exploring the many local hiking trails and the different landscapes Oregon has to offer.

Next on his list?  A puppy!

 

Stephanie Henderson, PA-C

Stephanie Henderson, PA-C

Physician Assistant

Stephanie Henderson grew up in Eugene, Oregon. She earned her B.S at Oregon State before working as a Physical Therapy Aide at Sacred Heart Medical Center RiverBend.

Stephanie traded the rain for the sun and attended A.T. Still University’s Physician Assistant program in Arizona. Missing the Willamette Valley, she joined Radiology Associates in October 2019.

Stephanie recently married in September 2019. Her spouse is attending PA school in Portland. Outside of their busy schedules, they enjoy backpacking with their Springer named Ranger, traveling, making sushi and watching the Oregon football team.

Go Ducks!

 

Chris Maier, PA-C

Chris Maier, PA-C

Physician Assistant

Chris Maier came to Radiology Associates from Florida, where he worked as a Physician Assistant for a gastrointestinal surgical oncology group and a dermatologic surgeon. The Northwest was not uncharted territory for him; he earned his BS in Physical Education, Health Sciences from Pacific Lutheran University in rainy Tacoma, before heading to Barry University where he earned his Master’s in Clinical Medical Science and Physician Assistant studies. He joined Radiology Associates in 2016.

Jason Olson, PA-C

Jason Olson, PA-C

Physician Assistant

Jason Olson brings a comprehensive set of medical skills to Radiology Associates. He earned his BS in Exercise Science from Portland State University, and his MS in Physician Assistant Studies from Pacific University. His work experience includes urgent care and emergency settings in rural and metropolitan areas. He joined Oregon Imaging in 2016 after working at the Cottage Grove PeaceHealth walk-in clinic.