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Introduction to MRI safety Questions with solutions
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Introduction to MRI safety
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Introduction to MRI safetyWhat does NEMA stand for? - answer National electric manufacturers' association.
What does NEMA do? - answer Provides the methods and standards on measuring
MRI system performance.
-Signal-to-noise
-Uniformity
-Acoustic noise
-Slice thickness
Specific Absorption Rate (SAR)
-Gradient induced fields
What does IEC stand for? - answer International Electrotechnical Commission
What does the IEC do? - answerSet limits for patient safety through limits on:
-Peripheral nerve stimulation
-specific absorption rate
-Temperature changes
Normal operating mode - answerNone of the outputs will cause physiological stress to
the patient.
First level controlled operating mode - answerOne of more outputs may cause
physiological stress to the patient.
Second level controlled operating mode - answerOne or more outputs may produce a
significant risk to the patient and require explicit ethical approval.
What does the FDA stand for? - answerFood and Drug Administration
What does the FDA do? - answerSets guidelines for MRI machines, equipment,
sequences performance, site layout and guidelines for testing and labeling passive
implants.
What is the maximum strength scanner that is safe for adults, adolescents and infants
older than one month? - answer8T
What is the maximum strength scanner that is safe for neonates? - answer4T
What does ASTM stand for? - answerAmerican Society of Testing and Materials
, What does ASTM do? - answerDevelop standards for which medical devices and
implants are tested regarding:
-Magnetic displacement force
-RF-induced heating
-Torque
-Implant-related artifacts
-Definition and icons for MR safe, MR unsafe, MR unconditional
What does ABMRS stand for? - answerAmerican Board of Magnetic Resonance Safety
What is an MRMD? - answerMR medical director
Who is the MRMD exam designed for? - answerAdministrative individuals
What is the responsibility of an MRMD? - answerEnsure safety of all patients, staff, and
visitors at all times when the scanners are operating.
What is an MRSO? - answerMR safety officer
Who is the MRSO exam designed for? - answerThose with direct patient care or
supervision of care. Ex: technologist
What is the responsibility of an MRSO? - answerDay-to-day safe operation of the MRI
unit.
What is an MRSE? - answerMR safety expert
Who is the MRSE exam designed for? - answerThose with expert safety knowledge.
What are the responsibilities of an MRSE? - answerThese individuals have a deep
knowledge in physics, MR equipment, biophysics or electromagnetism and device
scanning.
Who is an MR responsible person? - answerUsed in the UK and personnel may be the
clinical director, medical physicist, head of department or the lead radiographer.
True or false: MR safe can not be used interchangeably with MR compatible? -
answerTrue
What can the label MR safe be used for? - answerNonmetallic, non-conducting and
non-ferromagnetic material items. Especially plastic items.
What are examples of possible implanted objects? - answer-IUD
-Hernia mesh
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