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

SAR limit exceeded

Answer

Gradient-induced peripheral nerve stimulation

Answer

Quench event beginning

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

Proceed with the scan at lowest SAR

Answer

Cancel the exam without exception

Answer

Perform the scan with a 0.5T open system only

Question 3

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

Accepted Answer

Ferromagnetic stainless steel clips

Answer

Titanium clips

Answer

Cobalt-chromium clips

Answer

Platinum clips

Question 4

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

Accepted Answer

Level 2 MR personnel

Answer

Radiology technologists only

Answer

MR-trained non-MR personnel

Answer

Any hospital staff with ID badge

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

Avoid all scanner rooms during pregnancy

Answer

Wear a lead apron to reduce MRI exposure

Answer

Take a leave of absence immediately upon learning of pregnancy

Question 6

What sound pressure level (dB) can MRI gradient noise reach, necessitating hearing protection for patients?

Accepted Answer

99–115 dB

Answer

60–70 dB

Answer

75–85 dB

Answer

130–140 dB