James Anthony Seibert, Ph.D. for UC Davis Health

James Anthony Seibert, Ph.D.

Professor Emeritus, Department of Radiology

James Anthony Seibert is not currently accepting new patients. For assistance finding a UC Davis doctor, please call 800-2-UCDAVIS (800-282-3284).



Medical Physics



Locations and Contact

Lawrence J. Ellison Ambulatory Care Center

4860 Y St.
Sacramento, CA 95817

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Additional Numbers



Clinical Interests

Dr. Seibert is a diagnostic medical physicist providing acceptance testing and quality control evaluations of medical imaging equipment as well as radiation shielding and safety measures in the use of ionizing radiation throughout UC Davis Health. He specializes in radiation dosimetry, calculation of specific radiation doses for exams, and associated radiation risk assessment for patients. His imaging informatics expertise supports the acquisition, manipulation, display and archive of medical images within the Department of Radiology.

Research/Academic Interests

Dr. Seibert's research is based on his medical physics background, and includes digital imaging implementation and evaluation, radiation dose metrics tracking and reporting for patient dose assessment, and imaging informatics applications for image quality and workflow improvement. He is an author of a highly regarded textbook, "The Essential Physics of Medical Imaging", and provides medical physics education to radiology residents and graduate students.


Radiology Physics

Undergraduate School

B.S., Biology, UC Irvine, Irvine CA 1976

Undergraduate School

B.A., Chemistry, UC Irvine, Irvine CA 1977

Other School

M.S., Radiological Sciences, UC Irvine, Irvine CA 1981

Other School

Ph.D., Radiological Sciences, UC Irvine, Irvine CA 1983

Gold Medal, Radiological Society of North America, 2019

National Council on Radiation Protection and Measurements Council Member, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019

Lifetime Achievement Award, Upstate New York Association of Physicists in Medicine, 2018

American Board of Radiology Governor, 2017, 2018, 2019

Trustee (Medical Physics), American Board of Radiology, 2013, 2014, 2015, 2016, 2017

American Board of Imaging Informatics - Chairman 2012, 2013, 2014

American Association of Physicists in Medicine - President 2010, 2011, 2012

Radiological Society of North America - Third Vice-President, 2008

Society for Imaging Informatics in Medicine - Chairman 2004, 2005, 2006

To see a comprehensive list of Dr. Seibert's publications, please click here

Pfeiffer D, Al-Hallaq H, Halvorsen P, Hendrickson K, Lu ZF, Martin MC, Schueler B, Shuman J, E Zoberi J. AAPM medical physics practice guideline 3.b.: Levels of supervision for medical physicists in clinical training. J Appl Clin Med Phys. 2021 Jun;22(6):11-15. doi:10.1002/acm2.13258. Epub 2021 May 20. PMID:34018313.

Chen DS, Escobedo EM, Eastman JG, Bloomstein JD, Taylor SL, Seibert JA. Dose-Area Product-to-Effective Dose Conversion Coefficients for Pelvic Radiography Using a Monte Carlo Program. AJR Am J Roentgenol. 2020 Sep;215(3):679-684. doi:10.2214/AJR.19.22013. Epub 2020 Jul 13. PMID:32755183.

Seibert JA, Blatnica AP, Clements JB, Halvorsen PH, Herman MG, Johnson JL, Schueler BA, Martin MC, Palta JR, Pfeiffer DE, Pizzutiello RJ, Prisciandaro JI, Sherouse GW. AAPM medical physics practice guideline 7.a.: Supervision of medical physicist assistants. J Appl Clin Med Phys. 2020 Jul;21(7):11-15. doi:10.1002/acm2.12774. Epub 2019 Dec 4. PMID:31800151.

Seibert JA. Projection X-ray Imaging: Radiography, Mammography, Fluoroscopy. Health Phys. 2019 Feb;116(2):148-156. doi:10.1097/HP.0000000000001028. PMID:30585956.

Smith-Bindman, R, Wang, Y, Chu, P, Chung, R, Einstein, AJ, Balcombe, J, Cocker, M, Das, M, Delman, BN, Flynn, M, Gould, R, Lee, RK, Yellen-Nelson, T, Schindera, S, Seibert, A, Starkey, J, Suntharalingam, S, Wetter, A, Wildberger, JE, Miglioretti, DL. International variation in radiation dose for computed tomography examinations: prospective cohort study. BMJ. 2019 Jan 2;364:k4931. doi:10.1136/bmj.k4931. PMID:30602590.

Seibert JA, Morin RL. Patient Dose Monitoring and Focus on Nuclear Medicine Imaging Examinations. J Am Coll Radiol. 2018 Jan;15(1 Pt A):88-89. doi:10.1016/j.jacr.2017.07.004. Epub 2017 Aug 19. PMID:28826958.

Boone JM, Hernandez AM, Seibert JA. Two-dimensional breast dosimetry improved using three-dimensional breast image data. Radiol Phys Technol. 2017 Jun;10(2):129-141. doi:10.1007/s12194-017-0404-7. Epub 2017 Jun 1. PMID:28573551.

Demb J, Chu P, Nelson T, Hall D, Seibert A, Lamba R, Boone J, Krishnam M, Cagnon C, Bostani M, Gould R, Miglioretti D, Smith-Bindman R. Optimizing Radiation Doses for Computed Tomography Across Institutions: Dose Auditing and Best Practices. JAMA Internl Med. 2017 Jun 1;177(6):810-817. doi:10.1001/jamainternmed.2017.0445. PMID:28395000.

Smith-Bindman R, Wang Y, Yellen-Nelson TR, Moghadassi M, Wilson N, Gould R, Seibert A, Boone JM, Krishnam M, Lamba R, Hall DJ, Miglioretti DL. Predictors of CT Radiation Dose and Their Effect on Patient Care: A Comprehensive Analysis Using Automated Data. Radiology. 2017 Jan;282(1):182-193. doi:10.1148/radiol.2016151391. Epub 2016 Jul 20. PMID:27438166.