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- Magnetic resonance imaging (MRI) is in general a safe technique, although injuries may occur as a result of failed safety procedures or human error. During the last 150 years, thousands of papers focusing on the effects or side effects of magnetic or radiofrequency fields have been published. They can be categorized as incidental and physiological. Contraindications to MRI include most cochlear implants and cardiac pacemakers, shrapnel and metallic foreign bodies in the eyes. The safety of MRI during the first trimester of pregnancy is uncertain, but it may be preferable to other options. Since MRI does not use any ionizing radiation, its use generally is favored in preference to CT when either modality could yield the same information. (In certain cases, MRI is not preferred as it may be more expensive, time-consuming and claustrophobia-exacerbating). (en)
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- 48553 (xsd:nonNegativeInteger)
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- dbr:FDA
- Hansjörg Graf PhD Günter Steidle MS Fritz Schick PhD, MD (en)
- M Hasegawa, K Miyata, Y Abe, and T Ishigami (en)
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- MR-Conditional sign (en)
- MR-Safe sign (en)
- MR-Unsafe sign (en)
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- MR conditional sign.svg (en)
- MR safe sign.svg (en)
- MR unsafe sign.svg (en)
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- Event Description: It was reported to Siemens that a patient suffered a second degree burn on her right forearm after examination on the magnetom trio system... The patient has a titanium rod and screws placed in the right humerus. Patient has no feeling in right arm. Approximately five hours after the examination, the patient reported redness and a second degree blister, approximately 8 cm in length and 1,5 cm in width on the upper right forearm... According to the investigation from our experts, the RF burn was likely caused due to the presence of a titanium rod and screws placed in the right humerus. (en)
- A primary safety concern related to MRI is metallic medical implant heating by absorbing radiofrequency energy. This risk depends on the metal type, shape and orientation, the static magnetic field strength and the pulse sequence type and parameters. (en)
- Following Faraday’s law, the change of the magnetic flux through such a device induces eddy currents in the device and the metal subsequently converts electric energy into thermal energy... Furthermore, under specific conditions… gradient switching induced heating of other conductive material such as titanium, nitinol, or 316 stainless steel must be expected. (en)
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- MAUDE Adverse Event Report (en)
- Heating of metallic implants and instruments induced by gradient switching in a 1.5‐Tesla whole‐body unit (en)
- Radiofrequency heating of metallic dental devices during 3.0 T MRI (en)
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- Magnetic resonance imaging (MRI) is in general a safe technique, although injuries may occur as a result of failed safety procedures or human error. During the last 150 years, thousands of papers focusing on the effects or side effects of magnetic or radiofrequency fields have been published. They can be categorized as incidental and physiological. Contraindications to MRI include most cochlear implants and cardiac pacemakers, shrapnel and metallic foreign bodies in the eyes. The safety of MRI during the first trimester of pregnancy is uncertain, but it may be preferable to other options. Since MRI does not use any ionizing radiation, its use generally is favored in preference to CT when either modality could yield the same information. (In certain cases, MRI is not preferred as it may be (en)
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- Safety of magnetic resonance imaging (en)
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