MRI CAMRT Exam Questions With Correct
Answers
Is SNR proportional or inversely proportional to voxel volume - answerProportional
3 fields used in MRI - answer-static magnetic field
-TVMF (gradient field)
-RF field
3 main types of magnets used - answer-Superconducting (most common_
-Resistive...
Level 2 MR Personnel - answer✔Those more extensively trained and educated in MRI safety
How many times should a non emergent patient be screened - answer✔Twice, once verbally with
a level 2 MR Tech
How should emergent patients and their non MR personnel be screened - answer✔Once
How should unconscious/ unresponsive patients be screened - answer✔- A family member
should fill out the screening form
-If no reliable history can be obtained and MR exam cannot wait they must undergo plain film
radiography of head/neck, chest, abdomen/pelvis, upper arms and thighs
How should children and teens be screened - answer✔Twice, once in front of parents and once
without
MRI and pregnant patients - answer✔No known harmful effects but risk vs benefit assessment
should be made
MRI contrast and pregnant patients - answer✔Should not be routinely given to pregnant patients
but risk vs benefit assessment needed
What is the spatial field gradient - answer✔The variance in the fixed static field surrounding the
scanner, the manufacturerer supplies a SFG map
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