Online Courses

Principles of Doppler Physics

Price: $10.00
Imaging CE: 1.25
This course is accessible until 6/30/2025

Principles of Doppler Physics presents basic Doppler ultrasound, and its role and usefulness in evaluating the circulatory system. The Doppler equation will be analyzed, with emphasis on the angle and its impact on accurate velocity calculations. Potential sources of velocity measurement errors will be discussed.

NOTE for Imaging: This activity may be available in multiple formats or from different sponsors; individuals may not repeat and report a self-learning activity for credit twice in the same biennium. You must be licensed in the state of Florida to report an activity that is only approved by the state. If this activity is also approved by an organization that ARRT has approved to evaluate CE, select that organization’s name, as opposed to the state licensing agency name.

This course reports to CE Broker

Upon successful completion of this course, participants will be able to

  1. Identify factors that affect volume flow rate.
  2. Describe the use of Doppler ultrasound to evaluate blood flow velocities.
  3. Predict the effect of Doppler angle on velocity calculations.
  4. Identify sources of velocity calculations errors.
  5. Demonstrate effective angle of insonation for most accurate velocity calculation.

Qualified Planners/Faculty

Katherine Borok, AA, AS, RDMS, RDCS

Kathi was clinical coordinator and physics instructor for the Sonography Program at Florida Hospital College of Health Sciences. She is registered in Obstetrics and Gynecology, Abdomen, Neurosonography, and Adult Echocardiography, and is currently completing a bachelor’s degree in Computer Sciences.

This author has disclosed that there are neither conflicts of interest nor commercial affiliation with this activity.

Revisioning Author: Deziree Rada, MHSc, RDMS, RVT

Deziree Rada graduated from Florida Hospital College of Health Sciences with an A.S. in Diagnostic Medical Sonography in 2006 and a B.S. in Health Sciences in 2008. She then went on to complete her Master of Health Science with an emphasis on Higher Education from Nova Southeastern University in 2017. Registered in Abdomen, Obstetrics/Gynecology, Breast, and Vascular Technology, she has worked for the Florida Hospital system as a general sonographer since 2006. Ms. Rada was hired as faculty for the sonography program in 2012 and took the position as Program Director in 2017. She is currently a member of the Society of Diagnostic Medical Sonography (SDMS) and the American Institute of Ultrasound in Medicine (AIUM) and volunteers for these organizations.


This author has disclosed that there are neither conflicts of interest nor commercial affiliation with this activity.

- 6/30/2025
2001 K Street, NW
Suite 300 North
Washington, DC 20006
Phone: 800-334-2472
CE Credits: 1.25, Category: END2234 = A ARRT, Expires: 6/30/2025
CE Credits: 1.50, Category: FLDOH-BRC = Cat A/Technical Approved, Expires: 1/31/2026

Completion Requirements: To receive continuing education credit commensurate with the credit awarded for this on-line activity, the participant must:

  • View all modules and cases studies.
  • Participate and pass all Self-Checks and Post Test(s).
  • Complete and submit the on-line evaluation.

Certificates of Completion: will be available to print immediately upon finishing the completion requirements. You are encouraged to print and save your certificate for your portfolio as required by your licensing body. Interdisciplinary accredited activities, activities having multiple accreditors, will be listed individually on the Certificate of Completion.

Non-Endorsement of Products: echelon®, as an accredited provider, has demonstrated proficient experience and viable resources to provide for valid and reliable evaluation of CE activities. The accuracy of the facts and opinions contained in this activity are the responsibility of the author(s) and do not necessarily reflect those of echelon® or its sponsors. Practitioners should consult primary resources, state regulations, and their healthcare facility policies and procedures for specific application of said content to their local situation. echelon® does not imply that there is real or implied endorsement of any product, service, or company neither referred to in this activity nor of any company subsidizing costs related to this activity. All information contained in this activity is for educational purposes only.

Electronic Record Retention: All activity records are kept on file for a minimum of six (6) years.

Relevant Financial Relationships: echelon® also chooses full disclosure with each activity to report any relevant financial relationship affiliation or support in conjunction with the planning or development of any activity.

*There are no relevant financial relationships with ineligible companies for those involved with the ability to control the content of this activity.