James Seibert, Ph.D.

James Anthony Seibert, Ph.D.


Medical Physics




  • Professor


To see if James Anthony Seibert is accepting new patients, or for assistance finding a UC Davis doctor, please call 800-2-UCDAVIS (800-282-3284).

Lawrence J. Ellison Ambulatory Care Center

4860 Y St., Suite 3100
Sacramento, CA 95817
Driving Directions

Primary Phone:

Additional Phone Numbers

Phone: 916-734-0493
Fax: 916-734-6548
Clinic Referral Phone: 800-4-UCDAVIS (800-482-3284)



Clinical Interests

Dr. Seibert's clinical interests are directly related to radiological imaging. He specializes in radiation dose metrics for ionizing radiation examinations for monitoring, tracking and reporting of patient encounters and radiation doses, and provides oversight of the UC Davis Health Quality Control program for imaging devices at the Medical Center and the Primary Care Network.

Research/Academic Interests

Dr. Seibert's research focus is medical physics as applied to diagnostic imaging with emphasis on implementation and validation of digital techniques and quantitative applications in x-ray fluorography, projection imaging, mammography, CT, radiation dose, and imaging informatics to improve medical diagnosis and patient safety. 


Radiology Physics


Ph.D., UC Irvine, Irvine CA 1983

B.A., UC Irvine, Irvine CA 1977

M.S., UC Irvine, Irvine CA 1981

B.S., UC Irvine, Irvine CA 1977

Board Certifications

American Board of Imaging Informatics - Certified Imaging Informatics Professional, 2017

American Board of Radiology, Diagnostic Medical Physics (Continuous Maintenance of Certification),

American Board of Radiology, Diagnostic Radiological Physics,

American Board of Radiology, Therapeutic Radiological Physics, 1986

Professional Memberships

American Association of Physicists in Medicine

American College of Radiology

National Council on Radiation Protection and Measurements

Radiological Society of North America

Society for Imaging Informatics in Medicine

Honors and Awards

Gold Medal, Radiological Society of North America, 2019

International Organization of Medical Physics � Fellow, 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

Society for Imaging Informatics in Medicine - Fellow, 2009

American College of Radiology - Fellow, 2009

American Association of Physicists in Medicine - Fellow, 1999

Select Recent Publications

Seibert, JA. Projection X-ray Imaging: Radiography, Mammography, Fluoroscopy. Health Physics. 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.

Seibert JA, Clements JB, Halvorsen PH, Herman MG, Martin MC, Palta J, Pfeiffer DE, Pizzutiello RJ Jr, Schueler BA, Shepard SJ, Fairobent LA. AAPM Medical Physics Practice Guideline 3.a: Levels of supervision for medical physicists in clinical training. J Appl Clin Med Phys. 2015;16(3):5293.

Smith-Bindman R, Moghadassi M, Wilson N, Nelson TR, Boone JM, Cagnon CH, Gould R, Hall DJ, Krishnam M, Lamba R, McNitt-Gray M, Seibert A, Miglioretti DL. Radiation Doses in Consecutive CT Examinations from Five University of California Medical Centers. Radiology. 2015 Oct;277(1):134-41. doi:10.1148/radiol.2015142728. Epub 2015 May 19. PMID:25988262.

Boone JM, Mahesh M, Gingold EL, Seibert JA. A Call for the Structured Physicist Report. J Am Coll Radiol. 2016 Mar;13(3):307-9. doi:10.1016/j.jacr.2015.12.016. PMID:26944038.

Hernandez AM, Seibert JA, Boone JM. Breast dose in mammography is about 30% lower when realistic heterogeneous glandular distributions are considered. Med Phys. 2015 Nov;42(11):6337-48. doi:10.1118/1.4931966. PMID:26520725.