MRI MRI Safety 3

Question 1

During an MRI exam, a patient begins experiencing intense burning sensations on their skin near monitoring cables. What is the most likely cause?

Accepted Answer

RF-induced heating from looped or coiled cables

Answer

Looped or coiled cables act as antennas and can develop high RF-induced currents causing thermal burns on the skin.

Question 2

What is the recommended action when a patient with an unknown metallic implant cannot be identified before a clinically urgent MRI?

Accepted Answer

Consult the radiologist and ordering physician to assess risk vs. benefit

Answer

The radiologist and referring physician must jointly assess whether clinical urgency outweighs the unquantified risk of scanning with an unknown implant.

Question 3

Which type of aneurysm clip is considered MR Unsafe regardless of age or appearance?

Accepted Answer

Ferromagnetic stainless steel clips

Answer

Ferromagnetic stainless steel aneurysm clips are MR Unsafe because the static field can exert significant torque on the clip, risking rupture of the aneurysm.

Question 4

In the ACR zone system, who is responsible for controlling access to Zone III?

Accepted Answer

Level 2 MR personnel

Answer

Zone III access must be controlled by Level 2 MR personnel (those with full MR safety training) to prevent non-screened individuals from entering.

Question 5

A pregnant MRI technologist should follow which guideline regarding working in the MRI suite?

Accepted Answer

Limit time in the scanner room primarily during the first trimester due to acoustic and gradient exposure

Answer

Current guidelines suggest limiting time within the bore and active scanner room primarily in the first trimester; there is no requirement to cease work entirely.

MRI - Magnetic Resonance Imaging Practice Test

MRI - Magnetic Resonance Imaging Practice Test

MRI MRI Safety 3