MRI Safety and Risks Flashcard

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What is MRI?

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Magnetic Resonance Imaging (MRI) is a medical imaging technique used to visualize internal structures of the body in detail using strong magnetic fields and radio waves.

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What are induced currents in MRI?

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Induced currents are electrical currents generated in the body due to changing magnetic fields during an MRI scan, which can interfere with neural signaling.

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What is the biological effect of Gradient Fields (TVMF)?

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Gradient Fields can cause nerve stimulation and magnetophosphenes, which are visual sensations caused by magnetic fields.

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What is a quench in MRI?

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A quench is the rapid loss of superconductivity in MRI magnets, leading to the release of cryogens and potential safety hazards.

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What is the purpose of training staff in MRI safety?

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Training ensures that all personnel are aware of safety protocols, emergency procedures, and the risks associated with MRI to prevent accidents.

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What are magnetophosphenes?

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Magnetophosphenes are visual sensations or flashes of light experienced when the retina is stimulated by magnetic fields.

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What is the risk of acoustic noise in MRI?

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Acoustic noise during MRI can lead to temporary or permanent hearing loss if proper ear protection is not used.

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Why is padding used between skin and coils in MRI?

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Padding is used to prevent skin burns from contact with the coils during the MRI procedure.

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What is the significance of screening ferromagnetic items in MRI?

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Screening ferromagnetic items is crucial to prevent accidents, as these items can become projectiles in the strong magnetic field.

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What are the potential effects of heating during MRI?

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Heating can lead to burns or thermal injuries in patients due to the absorption of radiofrequency energy.