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Safety considerations in MR imaging
E Kanal1, F G Shellock, L Talagala
1Department of Radiology, University of Pittsburgh, PA 15213.
Abstract:
The authors identify eight areas of potential safety concern during clinical magnetic resonance (MR) imaging. These include (a) biologic effects of the static magnetic field; (b) ferromagnetic attractive "projectile" effects of the static magnetic field; (c) potential effects of the relatively slowly time-varying magnetic field gradients; (d) effects of the rapidly varying radio-frequency (RF) magnetic fields, including RF power deposition concerns; (e) auditory considerations from noise caused by the rapidly pulsed magnetic field gradients; (f) safety considerations concerning superconductive systems, including quenches, use of cryogens, and cryogen storage and handling; (g) psychological effects, such as claustrophobia and anxiety induced because of the examination; and (h) possible effects of the intravenous use of the MR contrast agent gadopentetate dimeglumine. The concerns in each of these categories are elaborated upon, and the available data are presented to clarify their status.
Insights
This study details eight safety concerns in clinical magnetic resonance (MR) imaging, covering biologic, projectile, gradient, radio-frequency, auditory, superconductive system, psychological, and contrast agent effects.
Area of Science:
- Medical Imaging
- Biophysics
- Radiological Safety
Background:
- Clinical magnetic resonance (MR) imaging utilizes powerful magnetic fields and radio-frequency pulses.
- Ensuring patient safety during MR procedures is paramount.
- Potential risks associated with MR imaging require thorough evaluation.
Purpose of the Study:
- To identify and elaborate on potential safety concerns during clinical MR imaging.
- To present available data clarifying the status of these safety concerns.
- To provide a comprehensive overview of MR imaging safety.
Main Methods:
- Review and categorization of potential safety issues in MR imaging.
- Elaboration on eight specific areas of concern.
- Presentation of supporting data for each identified risk.
Main Results:
- Eight key areas of potential safety concern were identified and detailed.
- These include static magnetic field effects (biologic, projectile), time-varying gradient fields, radio-frequency fields (power deposition), acoustic noise, superconductive system hazards (cryogens, quenches), psychological impacts (claustrophobia), and contrast agent (gadopentetate dimeglumine) effects.
- The current understanding and data status for each concern are presented.
Conclusions:
- A systematic review highlights critical safety considerations in MR imaging.
- Understanding these eight areas is essential for safe clinical practice.
- Further data and vigilance are necessary to mitigate potential risks.