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MRI Safety Flashcards

6 cards from real MRI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 MRI Safety flashcards as text

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

    Answer: RF-induced heating from looped or coiled cables

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

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

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

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

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

    Answer: Ferromagnetic stainless steel clips

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

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

    Answer: Level 2 MR personnel

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

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

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

    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.

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

    Answer: 99–115 dB

    MRI gradient switching can generate noise levels of 99–115 dB SPL, exceeding safe hearing thresholds and requiring earplugs or headphones for patients.