1) You may come back to this page and read the article as many times as you would like. 2) When you are ready to proceed to the test, just click on the "Take the test" link at the bottom of the page. 3) If you are not registered or logged in, you will be prompted to do so at that time. 4) Once you are registered you may take the test. 5) When you have passed the test you will be instructed on how to pay for your CEU in order to receive your certificate of completion. 6) If you choose not to pay at this time, you can log back in anytime in the future (your data is saved for your convenience), though
you will not receive the ARRT CEU numbers until after you pay.
Part 6 MRI Safety For Health Care Personnel
THIS ARTICLE EXPIRES ON FEBUARY 1, 2007. THE POST TEST MUST BE COMPLETED BEFORE 12:00 A.M. (CENTRAL TIME ZONE) ON FEBRUARY 1, 2007
Author: Nicholas Joseph Jr R.T. (MS), written on Tuesday September 14th 2004 - 4:13 PM Credits: 1.5
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List the main components of MRI safety.
List the three types of magnetic fields used in MRI that could be hazardous to ferromagnetic objects.
State the function of the static magnetic field and discuss the regulating of its field strength by the FDA.
State the meaning of the SI units Tesla (T) and Gauss (G).
Define the fringe field and discuss why it is a gradient field.
Discuss why the static and fringe fields are able to accelerate ferromagnetic objects as well causing them to torque.
Define the terms MR safe, MR compatible, and MR environment.
State the role of the Bureau of Radiological Devices and the implementation of the Problem Reporting Program (PRP) program.
State what is an acceptable plain film radiographic pre screening protocol to evaluate potential metallic fragment(s) in the eye.
State Faraday’s law of electromagnetic induction of current.
State FDA limits for gradient field strengths and rates.
Define “ohmic heating” in tissues and the specific absorption ratio.
Discuss the magneto-hydrodynamic effect.
Discuss how noise to the patient can be reduced during the MR scan.
Discuss safety measures to be taken if a quench is necessary.
Discuss patient screening for metallic implants and electrically stimulated devices prior to a MR scan.
