Radiation Measurements and Units: Key Concepts (2026)
Course Overview

In this microlearning course, you will learn the essential radiation measurement concepts and units used in medical imaging. This microlearning introduces SI units, radiation dose concepts, effective dose, and the most commonly used units across radiography, CT, MRI, ultrasound, and nuclear medicine. You will gain practical knowledge needed to interpret radiation measurements and communicate effectively in clinical imaging environments.

Content Areas (Codes):
The following Content Areas will be printed on the certificate for this course:

  • Education
  • Physics and Basic Science

Learning Objectives:

  • Explain the purpose of SI units and common measurement prefixes.
  • Differentiate among absorbed dose, equivalent dose, and effective dose.
  • Identify key radiation-related units used in medical imaging.
  • Perform basic dose and effective dose calculations.
  • Recognize commonly used units across CT, MRI, ultrasound, and nuclear medicine.

This non-CME enduring material is estimated to take 15 minutes to complete.

Start Date: 11/4/2026
Online Expiration Date: 11/3/2029

Faculty:

  • Jeanne G. Hill, MD
  • E. Russell Ritenour, PhD

This revised educational activity contains contributions from the following original faculty: Donald Frey, PhD; Marques L. Bradshaw, MD; Karen L. Brown, MPH, CHP; Jeanne G. Hill, MD.

Planners:

  • Edwin F. Donnelly, MD, PhD
  • Jian-Xiong Wang, PhD

Price:
Non-Member Rate: $0.00
Member Rate: $0.00

Refund / Exchange Policy:
RSNA will not issue any refunds or exchanges for online only versions of educational products or activities purchased online. Please review the entire product or activity description prior to purchase.

RSNA Disclaimer:
The opinions or views expressed in this activity are those of the presenters and do not necessarily reflect the opinions, recommendations or endorsement of the RSNA. Participants should critically appraise the information presented and are encouraged to consult appropriate resources for information surrounding any product or device mentioned. Information presented, as well as publications, technologies, products and/or services discussed, are intended to inform the learner about the knowledge, techniques, and experiences of RSNA faculty who are willing to share such information with colleagues. The RSNA disclaims any and all liability for damages to any individual user for all claims which may result from the use of said information, publications, technologies, products and/or services, and events.

Summary
Availability:
On-Demand
Expires on Nov 03, 2029
Cost:
FREE
Credit Offered:
No Credit Offered