Return to Course LibraryRegister Now

Original Release Date
June 2009

Material Review Date
June  6, 2016

Expiration Date
July 1, 2022

Daniel R. Thedens, PhD
Associate Research Scientist
Department of Radiology
Division of Diagnostic Physics
University of Iowa Health Center
Iowa City, IA

Equipment Requirements
PC: Win7/Win8, Pentium processor or faster, at least 2GB RAM, Internet Explorer version 10/11, Mozilla FireFox version 33.0.

MAC: OS version 10.8/10.9, Intel processor, at least 2GB RAM, Safari version 6.2, FireFox 33.0

4712-303T MRI for Technologists:
Basic Principles of MRI

Format: Online Course
Credit: 2.0 ARRT Category A (accepted by ARMRIT)
Tuition: $30   $5 Special Deal
Certificates of Credit accepted by ARMRIT

MRI for Technologists
is a training program designed to meet the needs of radiologic technologists entering or working in the field of magnetic resonance imaging (MRI). These units are designed to augment classroom instruction and on-site training for radiologic technology students and professionals planning to take the review board examinations, as well as to provide a review for those looking to refresh their knowledge base in MR imaging.


The skill of the technologist is the single most important factor in obtaining good quality diagnostic images. A successful MRI examination is the culmination of many factors under the direct control of the technologist.

MRI for Technologists: Basic Principles of MRI introduces the learner to the fundamental technical concepts of magnetic resonance imaging including the physics of how hydrogen protons respond when subjected to a magnetic field to how changes in magnetization can be detected and recorded.

After concluding this educational activity, the reader should be able to:

  • List the different types of tomographic imaging
  • Explain how MRI and CT differ
  • Explain the atomic structure of the hydrogen proton and its utility in MRI
  • Describe how the hydrogen proton responds when placed in an external magnetic field
  • Explain how a rotating magnetic field affects the behavior of hydrogen protons
  • Describe how protons can be reoriented to longitudinal and transverse directions
  • Compare and contrast transverse and longitudinal relaxation
  • Describe the time constants relevant to transverse and longitudinal relaxation
  • Explain Faraday’s law
  • Discuss why and when free induction decay occurs

This program has been approved by the American Society of Radiologic Technologists (ASRT) for 2.0 hours of ARRT Category A continuing education credit.

Tuition for this course includes:

  • Downloadable course content
  • Unlimited access to the course
  • Certificate of Credit

ICPME accepts American Express,MasterCard, and Visa.

Please note: tuition payments are non-refundable.

How to Enroll and Participate
Time to complete this activity is 2 hours.

  • Click ENROLL NOW, CONTINUE through the shopping cart, CONFIRM ORDER, and ACCESS COURSE NOW.
  • Once you are enrolled, you can return to this course anytime by logging to your account at
  • Click on MY ACCOUNT, then click on the course title. 

How to Receive Credit
Your online account with ICPME serves as a permanent record of credit certificates earned through

  • Login to your account at
  • Read the course content.
  • After viewing the course content, login to your account at, click on MY ACCOUNT, and click on the Session title.   
  • From the course home page, click the buttons 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

Daniel R. Thedens, PhD
Associate Research Scientist
Department of Radiology
Division of Diagnostic Physics
University of Iowa Health Center
Iowa City, IA

Daniel R. Thedens received his doctorate in electrical engineering from Stanford University. In addition to his research and teaching responsibilities at the University of Iowa, Dr. Thedens is an Associate Research Scientist in Department of Radiology, Division of Diagnostic Radiology - Physics, at the University of Iowa Health Center. He also serves as co-chair for the Radiology MR Research Advisory Board as well as Technical Director of the Small Animal MRI Facility.

Dr. Theden’s research interests are 3D MR image acquisition, rapid MR acquisition techniques, imaging of cartilage and other orthopaedic applications, cardiac MRI, and MR image processing.

We are grateful to Dr. Thedens for updating his original work, released in 2009.

Contact ICPME:



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.