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Who We Are


We believe that we are, by design and definition, a subspecialty diagnostic imaging practice, matched in expertise only by other academic medical centers.

We believe that we are at the forefront of diagnostic imaging science, ready to meet the changing healthcare trends and provide the highest imaging quality and value.

We believe that we are well positioned to provide comprehensive professional imaging services through our partnerships, including those with the Providence Health System.

We believe that we are the premier radiology practice in Oregon.



TRG has grown from a practice of twelve in 2005 to its current 26 physicians. TRG has a robust recruiting program, one that encourages fellows to open dialogue with members of TRG long before they complete their designated fellowships.

For more information about TRG or a practice position that may be coming available, please contact:

Kevin Wiesmann, MD
TRG Recruitment Lead


A leader in medical imaging and image-guided interventional procedures

The Radiology Group (TRG) has served Northwest communities since 1970. Our staff of subspecialty fellowship-trained radiologists ensures that examinations are performed and evaluated with the highest expertise and care. At each TRG site, the equipment and facilities are the most advanced and comfortable available.

TRG, LLC is one of the largest subspecialty groups in Oregon. TRG is composed of 26 radiologists, all of whom are fellowship trained. This means we have fellowship-trained radiologists in each of the subspecialty sections of diagnostic imaging and interventional radiology. Professional services with this level of clinical expertise and imaging technology are rarely seen outside of an academic environment. TRG physicians have been selected not only on the basis of their specialty training and board certification, but also for their desire to practice in an environment where they can provide specialty consultation. As medical imaging leaders, TRG continually addresses the dynamic imaging requirements of the healthcare community.


Diagnostic imaging services

TRG’s mission is to raise the standards of diagnostic imaging services, whether they are in acute tertiary care environs or outpatient centers. We make every effort to provide our hospitals, referring physicians, and patients with exceptional comprehensive radiology service. TRG, as a provider of diagnostic imaging, strives to be the most respected and progressive provider of imaging services in every community we serve.

In 2016, TRG performed and interpreted 401,223 procedures earning the group top service standing

top service standing

due to the diagnostic imaging volume.

 Volume without measurement, however, prevents service enhancement. TRG is committed to raising service standards, constantly performing peer review quality measurements and institutional quality reviews. TRG also carefully monitors impressions and comments from our referring physicians, patients, and institutions. By comparing and contrasting service benchmarks, TRG has become more responsive to delivery issues, just one of many measures the group uses to determine the delivery of service goals and quality.


“From receptionist, technicians and right down to Dr. Ball…everyone was absolutely excellent and made what could be a very nerve-wracking situation better every step of the way. Cannot thank all of them enough.”


"I highly recommend the Ruth Spear breast center at St. Vincent, the staff, and the doctors.  I feel the excellent care I received was critical to my recovery / survival of breast cancer."