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Release Date:
May 12, 2017

Expiration Date:
June 1, 2022



John Shephard, PhD, CCD
Professor of Radiology & Biomedical Imaging
UCSF School of Medicine

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Expanding Role of DXA in Patient Health and Human Performance ARCHIVE

A certified one-hour archived webinar for radiologists, radiologic technologists, sports medicine physicians, and endocrinologists

Recording of a live webinar presented on May 4, 2017

Format: Archived Webinar
MD Credit: 1.0 AMA PRA Category 1
RT Credit: 1.0 ARRT Category A
Fee:  free

Course Overview
Dual energy x-ray absorptiometry (DXA) traditionally has been used by physicians for diagnosing osteoporosis, assessing fracture risk, and monitoring changes in bone mineral density. This low-cost, low-radiation, and easily-accessed modality has an expanding role in: detecting abnormalities in body composition, clinical obesity, sarcopenia, and lipodystrophy [1]; determining the effects of diet, exercise, and physical training for patients attempting to lose or control weight; and tracking muscle growth and skeletal bone and fat mass to improve or enhance health and performance. [2, 3, 4] This webinar will discuss the use of DXA in patients who desire analytical information on their own body composition to improve or enhance their health and physical performance.

  1. Petak S, Barbu CG, Yu EW, et al. The Official Positions of the International Society for Clinical Densitometry: body composition analysis reporting. J Clin Densitom. 2013;16(4):508-519.
  2. Bilsborough JC, Greenway K, Opar D, Livingstone S, Cordy J, Coutts AJ. The accuracy and precision of DXA for assessing body composition in team sport athletes. J Sports Sci. 2014;32(19):1821-1828.
  3. Wilson JP, Fan B, Shepherd JA. Total and regional body volumes derived from dual-energy X-ray absorptiometry output. J Clin Densitom. 2013;16(3): 368-373.
  4. Riberio AS, Schoenfeld BJ, Fleck SJ, Pina FL, Nascimento MA, Cyrino ES. Effects of tradition and pyramidal resistance training system on muscular strength, muscle mass, and hormonal responses in older women: a randomized crossover trial. J Strength Cond Res. 2016 Sep 23. [Epub ahead of print]

Educational Objectives
At the conclusion of this activity, participants should be better able to:

  • List the clinical indications for ordering a DXA examination, including assessment of bone mineral density, fracture risk, sarcopenia, and lipodystrophy.
  • Discuss the role of DXA in the evaluation of body composition, including measurement of bone, muscle, and fat mass.
  • Utilize DXA for patients who desire analytical information on their own body composition to improve or enhance their health and physical performance.

Physician Continuing Medical Education
This activity has been planned and implemented in accordance with the accreditation requirements and policies of the Accreditation Council for Continuing Medical Education (ACCME) through the joint providership of Postgraduate Institute for Medicine and International Center for Postgraduate Medical Education. The Postgraduate Institute for Medicine is accredited by the ACCME to provide continuing medical education for physicians.

The Postgraduate Institute for Medicine designates enduring material for a maximum of 1.0 AMA PRA Category 1 Credit(s)™. Physicians should claim only the credit commensurate with the extent of their participation in the activity.

SA-CME: This activity meets the criteria for self-assessment toward the purpose of fulfilling requirements in the American Board of Radiology (ABR) Maintenance of Certification Program.

The European Accreditation Council for CME (EACCME®)
The UEMS-EACCME® has mutual recognition agreements with the American Medical Association (AMA) for live event and e-learning materials. For more information go to .

Radiologic Technologist Continuing Education
This program has been approved by the American Society of Radiologic Technologists (ASRT) for 1.0 hour of ARRT Category A continuing education credit.

How to Participate
There are no fees or prerequisites to participate in this program.

  • Click on the blue link. Complete the precourse questions and SUBMIT.
  • Click on the blue link again to view the recording.

How to Receive Credit

  • Log-in to your account at
  • View the entire educational activity session. At the conclusion of the lecture, close the Vimeo window.
  • Return to the course in your account at
  • From the COURSE HOME page, click the button for POSTTEST and for EVALUATION.
  • A passing grade of at least 75% is required to receive credit. You may take the test up to three times.
  • Upon receipt of a passing grade, you will be able to print a certificate of credit from your account at

Your certificate of credit will remain in your account at as a permanent record of your participation.


John Shepherd, PhD, CCD
Professor of Radiology & Biomedical Imaging
UCSF School of Medicine

Dr. Shepherd is a Professor in the Department of Radiology at the University of California at San Francisco (UCSF). He is also the Director of the Center for Translational Science Institute’s Body Composition, Energy Metabolism and Exercise Physiology Laboratory at UCSF.

Dr. Shepherd received his PhD in Engineering Physics from the University of Virginia and postdoctoral training in Biophysics from Princeton University. He leads a group of researchers studying advanced body composition and bone densitometry techniques. His group provides DXA and body composition expertise to many publicly funded studies including NHANES, Health Aging and Body Composition Study, and Bone Mineral Density in Children Study.

Dr. Shepherd is a frequent expert consultant to the UN's International Atomic Energy Agency for body composition assessment and has been sent on over 15 missions to developing countries around the world. He has served the International Society for Clinical Densitometry (ISCD) in multiple ways including the BDC (faculty), BCC (faculty), five PDC committees, Southwest Regional Representative, and is the current President. He is a previous recipient of the ISCD Oscar Gluck Humanitarian and Global Leadership Awards and is a Fulbright Scholar to Sweden. He has published over 150 peer-reviewed publications.

Disclosure Information
Postgraduate Institute for Medicine (PIM) requires instructors, planners, managers and other individuals who are in a position to control the content of this activity to disclose any real or apparent conflict of interest (COI) they may have as related to the content of this activity. All identified COI are thoroughly vetted and resolved according to PIM policy. The existence or absence of COI for anyone in a position to control content will be disclosed to participants prior to the start of each activity.

John Shepherd, PhD, CCD, has recieved consulting fees from Hologic.

The following planners and managers have reported NO financial relationships or relationships to products or devices they or their spouse/life partner have with commercial interests related to the content of this CME activity:

Trace Hutchison, PharmD
Samantha Mattiucci, PharmD, CHCP
Linda McLean, MS 
Victoria Phoenix, BS           
Jan Schultz, MSN, RN, CHCP
Judi Smelker-Mitchek, MBA, MSN, RN                    

Disclosure of Unlabeled Use
This educational activity may contain discussion of published and/or investigational uses of agents that are not indicated by the FDA. The planners of this activity do not recommend the use of any agent outside of the labeled indications. 

The opinions expressed in the educational activity are those of the faculty and do not necessarily represent the views of the planners. Please refer to the official prescribing information for each product for discussion of approved indications, contraindications, and warnings.

For questions regarding this program, please contact ICPME:

Jointly provided by

This activity is supported by an independent educational grant from Hologic, Inc.


Participants have an implied responsibility to use the newly acquired information to enhance patient outcomes and their own professional development. The information presented in this activity is not meant to serve as a guideline for patient management. Any procedures, medications, or other courses of diagnosis or treatment discussed or suggested in this activity should not be used by clinicians without evaluation of their patient’s conditions and possible contraindications on dangers in use, review of any applicable manufacturer’s product information, and comparison with recommendations of other authorities.