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Meet Our Team

MRI Interpretations by CDI

Thomas J. Gilbert, Jr. M.D., M.P.P.

Dr. Gilbert

Thomas J. Gilbert, Jr., M.D., M.P.P. is a Musculoskeletal & Spine Radiologist, National Spine Section Leader and Chief Clinical Officer at Center for Diagnostic Imaging (CDI). Dr. Gilbert joined CDI in 1997 with expertise in body, orthopedic and spine imaging. Before joining CDI, he served as assistant professor of Orthopedic Radiology at the University of Minnesota Hospitals and Clinics in Minneapolis.


  • Undergraduate:  Massachusetts Institute of Technology in Cambridge, Massachusetts

  • Medical Degree: Harvard Medical School in Boston, Massachusetts

  • Masters: Public Policy at Kennedy School of Government, Harvard University in Cambridge, Massachusetts

  • Internship: Internal Medicine internship at the University of Kentucky Medical Center in Lexington, Kentucky

  • Residency: Stanford University Medical Center in Stanford, California

  • Fellowship: Body MRI fellowship at the University of California in San Francisco, California


  • Radiological Society of North America

  • American College of Radiology

  • Minnesota Radiological Society

  • North American Spine Society


  • Dr. Gilbert has published numerous articles and book chapters on body, spine and orthopedic imaging

Hobbies: Dr. Gilbert interests include squash, fly fishing and history.

William J. Mullin, M.D.

Dr. Mullin

William J. Mullin, M.D. is a Spine Radiologist at Center for Diagnostic Imaging (CDI). Dr. Mullin joined CDI in 1993 and has developed expertise in Spinal MRI and Spinal Injections.


  • Undergraduate: University of California Irvine in Irvine, California

  • Medical: University of California Irvine in Irvine, California

  • Internship: Internal Medicine internship at University of California Irvine, Veterans Administration Medical Center in Orange, California

  • Residency: Diagnostic Radiology residency at University of California Irvine College of Medicine in Irvine, California

  • Fellowship: Magnetic Resonance Imaging fellowship at University of California Irvine College of Medicine in Irvine, California


  • American College of Radiology

  • Radiological Society of North America


  • Kapelov SR, Teresi LM, Bradley WG, Bucciarelli NR, Murakami DM, Mullin WJ, Jordan JE. Bone Contusions of the knee: Increased Lesion Detection with Fast Spin-Echo MR Imaging with Spectroscopic Fat Saturation. Radiology. Dec 1993;189(3):901-4.

  • Mullin WJ, Heithoff KB, Gilbert TJ, Renfrew DL. Magnetic Resonance Evaluation of Recurrent Disc Herniation: Is Gadolinium Necessary? Spine. June 15, 2000;25(12):1493-9.

  • Gilbert TJ, Heithoff KB, Mullin WJ.  Radiographic Assessment of Cage-Assisted Interbody Fusions in the Lumbar Spine.  Seminars in Spine Surgery. Dec.2001;13(4): 311-5.

  • Choma, TJ, Denis F, Lonstein JE, Perra JH, Schwender JD, Garvey TA, Mullin WJ. Stepwise Methodology for Plain Radiographic Assessment of Pedicle Screw Placement: A Comparison with Computer Tomography. Journal of Spinal Disorders & Techniques. Dec. 2006;19(8):547-53.

  • Butterman GR, Mullin WJ.  Pain and disability correlated with disc degeneration via magnetic resonance imaging in scoliosis patients. Eur Spine J. 2008;17:240-9.

  • Butterman GR, Mullin WJ. Percutaneous vertebral body cement augmentation for back pain related to occult osteomyelitis/diskitis. Orthopedics. Nov 9, 2011;34(11):e788-92.

  • Butterman GR, Mullin WJ, Thorson TM. Outcomes of posterior facet versus pedicle screw fixation of circumferential fusion: a cohort study. Eur Spine J. Oct 2, 2013.

Hobbies: Fishing

Timothy J. Mick, D.C., D.A.C.B.R., F.I.C.C.

Dr. Mick

Timothy J. Mick, D.C., D.A.C.B.R., F.I.C.C. is a Chiropractic Radiologist providing MRI and X-ray study interpretations for Doctors of Chiropractic. Dr. Mick is a nationally recognized chiropractic radiologist, educator and author.

As associate professor, he headed the department of radiology at Northwestern College of Chiropractic (NWCC) in Minnesota for over 17 years and led the development of their Radiological Consultation Services. Dr. Mick was also instrumental in initiating and directing NWCC’s radiology residency program, and providing expertise in diagnostic imaging for Northwestern Health Sciences University’s internationally recognized research department. He lectures to chiropractors, interns, medical doctors and allied health professionals on a variety of topics across the U.S. and in Europe and has also served as an expert witness on issues regarding diagnostic imaging. Following graduation from NWCC in 1986, Dr. Mick completed a three-year radiology residency at Los Angeles College of Chiropractic and was board-certified in chiropractic radiology in 1989. His training included rounds and conferences at the University of Minnesota, University of Southern California, University of California-San Diego and UCLA-Harbor Medical School.

Dr. Mick is a Diplomate of the Chiropractic Board of Radiology and is a past President of the Board, the examining body for chiropractic radiologists.  He is also past President of the American Chiropractic College of Radiology and the American Chiropractic Association Council on Diagnostic Imaging and is a Fellow of the International College of Chiropractors. He was among the first chiropractic radiologists to work with medical radiology groups and since the late 1980’s, he has read studies for more than two dozen imaging centers and eight different medical imaging groups.

Dr. Mick has served on the editorial boards for two professional journals and has authored or co-authored 23 textbook chapters and journal articles. He has also written questions for and/or served as a consultant for a number of professional licensing and certifying bodies, including the National Board of Chiropractic Examiners, the Minnesota Board of Chiropractic Examiners, the American Board of Chiropractic Orthopedists and the American Board of Chiropractic Radiology.  Dr. Mick is currently a member of the American Chiropractic College of Radiology, the American Chiropractic Association and Minnesota Chiropractic Association.

Dr. Mick has received a number of awards in recognition of his commitment to clinical and educational excellence in diagnostic imaging. These include being honored as the Minnesota Chiropractic Association (MCA) Educator of the Year in 2004, along with nominations for the same award the previous two years. He received the MCA President’s Award for exceptional service to the profession in 2002 and also was selected by his colleagues at Northwestern for the Faculty Award for Excellence in Clinical Practice in 2005. 


  • Undergraduate: College of St. Thomas in St. Paul, Minnesota and University of Minnesota in Minneapolis, Minnesota

  • Medical: Northwestern College of Chiropractic in Bloomington, Minnesota

  • Residency: Diagnostic Imaging residency at Los Angeles College of Chiropractic in Whittier, California

  • Diplomate of the American Chiropractic Board of Radiology (DACBR)


  • American Chiropractic College of Radiology

  • American Chiropractic Association

  • Minnesota Chiropractic Association

  • ACA Council on Diagnostic Imaging

  • NWCC Alumni Association

  • Editorial Board, Journal of the Academy of Chiropractic Orthopedists


  • Mick TJ, Schultz G.  Atypical brachydactyly:  A case report.  JMPT April, 1989.

  • Mick TJ.  Scoliosis, Chapter in Jaeger SA and Pate OM. Case Studies in  Chiropractic Radiology, Rockville, MD: Aspen, 1990

  • Contributing author in Phillips RB, et al.  Stress x-rays and the low back patient. Presented at the 1988-89 California Chiropractic Association Convention, published, JMPT, March/April, 1990.

  • Mick TJ, et al.  Spinal imaging and spinal biomechanics, In Haldeman, S, ed. Principles and Practice in Chiropractic, 2nd ed. Appleton & Lange, 1991.

  • Mick TJ.  The use of functional radiographs in diagnosis:  A literature review. Proceedings of the 7th Annual Conference on Research and Education, Palm Springs, CA, 1992.

  • Mick TJ. Anatomical Variants & Congenital Diseases chapters In Marchiori DM. Clinical Imaging:  With Skeletal, Chest and Abdomen Pattern Differentials, Mosby, 1st-3rd editions.

  • Mick TJ.  Diagnostic imaging applications in the utilization of active exercise.  In Stude D, ed. A Clinician's Guide to Spinal Rehabilitation, 1999.

Hobbies: Running, fishing and gardening

Stephen Fridinger, D.C., D.A.C.B.R.


Stephen Fridinger, D.C., D.A.C.B.R., is a board-certified chiropractic radiologist at Center for Diagnostic Imaging (CDI).

We are excited to welcome Dr. Fridinger to CDI. He will be reading for our out-of-state markets and we look forward to him reconnecting with our Minnesota market in late 2018!


  • Undergraduate: Gustavus Adolphus College in St. Peter, Minnesota.

  • Medical: Northwestern Health Sciences University in Bloomington, Minnesota

  • Residency: Radiology residency at Northwestern Health Sciences University in Bloomington, Minnesota.


  • American Chiropractic Association

  • American Chiropractic College of Radiology

  • Council of Diagnostic Imaging

  • Minnesota Chiropractic Association

  • Minnesota Medical Association

  • Twin Cities Medical Society

X-ray Interpretations by RCS

Christopher C. Major, D.C., D.A.C.B.R., A.T.C.

Chris Major

Anita Manne, D.C., D.A.C.B.R.

Anita Manne

Jeffrey Rich, D.C., D.A.C.B.R.

Jeffrey Rich