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Medical School: University of Colorado School of Medicine – Aurora, CO

Internal Medicine: Basset Medical Center – Cooperstown, NY

Diagnostic Radiology: University of Colorado – Aurora, CO

Interventional Radiology: Mayo Clinic – Rochester, MN

Medical School:  University of Cincinnati College of Medicine – Cincinnati, OH

Internal Medicine: Rush-Presbyterian-St. Luke’s Medical Center – Chicago, IL

Diagnostic Radiology: Tulane University Medical Center – New Orleans, LA

Neuroradiology/Endovascular Surgical Neuroradiology: Mallinckrodt Institute of Radiology,

Washington University – St. Louis, MO

American Board of Radiology 1994

Certificate of Added Qualifications in Neuroradiology 1996

Donald Frei, MD, is one of the board-certified neurointerventional surgeons at RIA Neurovascular in Englewood, Colorado. 

Dr. Frei earned his Doctor of Medicine at the University of Cincinnati College of Medicine, in Cincinnati, Ohio. He served his internship at Rush-Presbyterian-St. Luke's Medical Center in Chicago, before continuing his training with a diagnostic radiology residency at Tulane University Medical Center in New Orleans. 

Dr. Frei went on to complete rigorous fellowship training in neuroradiology / endovascular surgical neuroradiology at Washington University's Mallinckrodt Institute of Radiology in St. Louis. Dr. Frei has also contributed to several articles in peer-reviewed journals. In addition to his certification through the American Board of Radiology, he also has a certificate of added qualifications in neuroradiology.

He provides a wide range of neurointerventional services and has specific interest in the endovascular treatment of acute stroke, intracranial aneurysms, and extracranial revascularization techniques. He also offers minimally invasive procedures, including catheter-directed stroke intervention, angioplasty, stent revascularization, and treatments for cerebral aneurysms and arteriovenous malformations (AVMs).

Medical School: Midwestern University / Chicago College of Osteopathic Medicine – Downer’s Grove, IL

Internal Medicine: Midwestern University / Franciscan St. James Health – Olympia Fields, IL

Diagnostic Radiology: Midwestern University / Franciscan St. James Health – Olympia Fields, IL

Musculoskeletal Imaging: Mayo Clinic – Rocherster, MN

Breast Imaging: Mallinckrodt Institute of Radiology / Washington University in St. Louis – St. Louis, MO

American Osteopathic Board of Radiology

Medical School: University at Buffalo School of Medicine – Buffalo, NY

Internal Medicine: University at Buffalo School of Medicine Catholic Health System – Buffalo, NY

Diagnostic Radiology: University of Miami, Jackson Memorial Hospital – Miami, FL

Neuroradiology: UCSF Neuroradiology – San Francisco, CA

American Board of Radiology

Medical School:  University of Florida College of Medicine, Junior Honors Medical School – Gainesville, FL

Internal Medicine: Mallinckrodt Institute of Radiology, Washington University Medical Center – St. Louis, MO

Diagnostic Radiology: Mallinckrodt Institute of Radiology, Washington University Medical Center – St. Louis, MO

Pediatric Radiology: Mallinckrodt Institute of Radiology / St. Louis Children’s Hospital, Washington University Medical Center – St. Louis, MO

American Board of Radiology 1996

Certificate of Added Qualification in Pediatric Radiology 1998, 2008

Medical School: University of Virginia School of Medicine – Charlottesville, VA

Interventional Radiology: Michigan Medicine – Ann Arbor, MI
Riverside Medical Center – Newport News, VA

Interventional Radiology: Michigan Medicine – Ann Arbor, MI

Medical School: Eastern Virginia Medical School – Norfolk, VA

Surgery: University of Alabama – Birmingham, AL

Diagnostic Radiology: University of Alabama – Birmingham, AL

Abdominal Imaging: Presbyterian Hospital, University of Pittsburgh – Pittsburgh, PA

American Board of Radiology 2002

Medical School:  University of Texas Southwestern Medical Center – Dallas, TX

Internal Medicine:  Baylor University Medical Center – Dallas, TX

Diagnostic Radiology: Baylor University Medical Center – Dallas, TX

MR Predominant Body Imaging & Musculoskeletal: Northwestern University Feinberg School of Medicine – Chicago, IL

Medical School:  University of the Witwatersrand Medical School – Johannesburg, South Africa

Radiology: Johannesburg General Hospital – Johannesburg, South Africa; St. Louis University Health Science Center – St. Louis, MO

Body Imaging: Cornell University Medical Center, New York Hospital – New York City, NY

Mammography: New York University Breast Imaging Center – New York City, NY

American Board of Radiology 1998

Medical School: Dartmouth Medical School – Hanover, NH

Internal Medicine: William Beaumont Army Medical Center – El Paso, TX

Diagnostic Radiology: San Antonio Uniformed Services Health Education Consortium – San Antonio, TX

Research Fellowship: Ohio State University Heart Lung Institute – Columbus, OH

American Board of Radiology 2008

Caroline Tomas, MD, is a highly skilled and board-certified radiologist at Invision Sally Jobe, where she provides exceptional care to patients in Denver, Colorado. Specializing in abdominal imaging and musculoskeletal radiology, Dr. Tomas offers a comprehensive, patient-centered approach to diagnosing and managing complex medical conditions.

Dr. Tomas earned her medical degree from the Chicago Medical School at Rosalind Franklin University in North Chicago, Illinois. She completed her diagnostic radiology residency at the University of Colorado in Aurora, Colorado, and went on to complete an abdominal imaging fellowship at the prestigious Mallinckrodt Institute of Radiology at Washington University in St. Louis, Missouri. 

Additionally, Dr. Tomas has completed mini fellowships in neuroradiology and musculoskeletal imaging, further enhancing her expertise in advanced imaging techniques.

Throughout her career, Dr. Tomas has contributed to medical research, with publications in leading medical journals on topics ranging from vertebral body fractures to Alzheimer’s disease. She has presented her findings at major conferences, including the Radiological Society of North America (RSNA) and the Society of Skeletal Radiology.

Dr. Tomas is an active member of several professional organizations, including the American College of Radiology, the Radiological Society of North America, and the Colorado Radiology Society. She is also a member of the prestigious Alpha Omega Alpha Honor Medical Society, reflecting her commitment to excellent patient care and medical education.

In her free time, Dr. Tomas enjoys hiking, skiing, and spending quality time with family and friends. She is also passionate about cooking and exploring the outdoors.

Medical School: University of Utah School of Medicine – Salt Lake City, UT

Internal Medicine: University fo Utah – Salt Lake City, UT

Diagnostic Radiology: Hartford Hospital – Hartford, CT

Diagnostic Neuroradiology: Mallinckrodt Institute of Radiology, Barnes-Jewish Medical Center – St. Louis, MO

Musculoskeletal Radiology: University of Alabama at Birmingham – Birmingham, AL

American Board of Radiology 2009

Medical School:  The University of Texas HSC San Antonio – San Antonio TX

Diagnostic Radiology: The University of Wisconsin School of Medicine and Public Health – Madison WI

Abdominal Imaging: The University of Wisconsin School of Medicine and Public Health – Madison WI

Breast Imaging: The University of Wisconsin School of Medicine and Public Health – Madison WI

American Board of Radiology 2017

Medical School:  University of Illinois College of Medicine – Champaign-Urbana, IL

University of Illinois College of Medicine – Peoria, IL

Radiology: University of Illinois College of Medicine – Peoria, IL

Nuclear Radiology: Duke University – Durham, NC

American Board of Radiology 2009

American Board of Nuclear Medicine 2010

Medical School:  University of California San Francisco – San Francisco, CA

St. Mary’s Hospital Medical Center – San Francisco, CA

Diagnostic Radiology: University of Colorado Health Sciences Center – Denver, CO

Philips MRI Research Fellow, Abdominal Imaging:  University of Washington Medicine – Seattle, WA

American Board of Radiology 1994

Diplomate, National Board of Medical Examiners 1989

Medical School:  Chicago College of Osteopathic Medicine – Downers Grove, IL

Internal Medicine: Cook County Hospital – Chicago, IL

Internal Medicine: Cook County Hospital – Chicago, IL

Radiology: Cook County Hospital – Chicago, IL

Breast & Women’s Imaging:  Northwestern University Feinberg School of Medicine, Northwestern Memorial Hospital Department of Radiology, Lynn Sage Comprehensive Breast Center –  Chicago, IL

American Board of Radiology 2003

Recertification 2013

Medical School:  University of Michigan Medical School – Ann Arbor, MI

Mallinckrodt Institute of Radiology, Washington University Medical Center – St. Louis, MO

Magnetic Resonance Imaging: Cedars-Sinai Medical Center, Los Angeles, CA

American Board of Radiology 1993

Medical School:  Tufts University School of Medicine – Boston, MA

Transitional: Boston University, Brockton Hospital – Boston, MA

Diagnostic Radiology: Baystate Medical Center, Tufts University Western Campus – Springfield, MA

Nuclear Medicine:  Harvard Medical School – Boston, MA

American Board of Radiology 2006