No abstract

Although 7-T MRI has recently received approval for use in clinical patient care, there are distinct safety issues associated with this relatively high magnetic field. Forces on metallic implants and radiofrequency power deposition and heating are safety considerations at 7 T. Patient bioeffects such as vertigo, dizziness, false feelings of motion, nausea, nystagmus, magnetophosphenes, and electrogustatory effects are more common and potentially more pronounced at 7 T than at lower field strengths. Herein the authors review safety issues associated with 7-T MRI. The rationale for safety concerns at this field strength are discussed as well as potential approaches to mitigate risk to patients and health care professionals.

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The need for a guidance document on MR safe practices arose from a growing awareness of the MR environment's potential risks and adverse event reports involving patients, equipment, and personnel. Initially published in 2002, the American College of Radiology White Paper on MR Safety established de facto industry standards for safe and responsible practices in clinical and research MR environments. The most recent version addresses new sources of risk of adverse events, increases awareness of dynamic MR environments, and recommends that those responsible for MR medical director safety undergo annual MR safety training. With regular updates to these guidelines, the latest MR safety concerns can be accounted for to ensure a safer MR environment where dangers are minimized. Level of Evidence: 1 Technical Efficacy Stage: 5 J. Magn. Reson. Imaging 2020;51:331–338.

Magnetic resonance imaging (MRI), frequently touted as the "the safe modality," suffers from significant, and growing, numbers of preventable adverse events. Improvements in MR safety can result from enhancements to expected operational elements: training, screening, and patient-management protocols. Less frequently considered is the safety benefits that may be realized through smart design of MR facilities. Through conscientious and thorough prospective site planning involving MR staff and radiologists in the design process for MR physical facilities, MR providers can have a positive impact on improving safety as well as efficiency for the benefit of their patients, for ancillary healthcare workers, and for themselves.