12. Do not position electrically conductive materials across an external metallic prosthesis
13. Allow only properly trained individuals to operate devices (e.g., monitoring equipment) in
14. Follow all manufacturer instructions for the proper operation and maintenance of
15. Electrical devices that do not appear to be operating properly during the MR procedure
16. Closely monitor the patient during the MR procedure. If the patient reports sensations of
17. RF surface coil decoupling failures can cause localized RF power deposition levels to reach
The adoption of these guidelines will help to ensure that patient safety is maintained, especially
as more conductive materials and electronically‐activated devices are used in association with
Bashein G, Syrory G. Burns associated with pulse oximetry during magnetic resonance imaging.
Brown TR, Goldstein B, Little J. Severe burns resulting from magnetic resonance imaging with
cardiopulmonary monitoring. Risks and relevant safety precautions. Am J Phys Med Rehabil
Chou C‐K, McDougall JA, Chan KW. Absence of radiofrequency heating from auditory implants
during magnetic resonance imaging. Bioelectromagnetics 1997;44:367‐372.
Dempsey MF, Condon B. Thermal injuries associated with MRI. Clin Radiol 2001;56:457‐65.
Dempsey MF, Condon B, Hadley DM. Investigation of the factors responsible for burns during
MRI. J Magn Reson Imaging 2001;13:627‐631.
ECRI, Health Devices Alert. A new MRI complication? Health Devices Alert. May 27, pp. 1, 1988.
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Expression MR400 Instructions for Use Guidelines and References E‐3
(e.g., external fixation device, cervical fixation device, et cetera) or similar device that is in
direct contact with the patient.
the MR environment.
physiologic monitoring or other similar electronic equipment intended for use during MR
should be removed from the patient immediately.
heating or other unusual sensation, discontinue the MR procedure immediately and
perform a thorough assessment of the situation.
excessive levels. The MR system operator will recognize such a failure as a set of concentric
semicircles in the tissue on the associated MR image or as an unusual amount of image
non‐uniformity related to the position of the RF coil.