Biological effects and physical safety aspects of NMR imaging and in vivo spectroscopy
An assessment is made of the biological effects and physical hazards of static and time-varying fields associated with the NMR devices that are being used for clinical imaging and in vivo spectroscopy. A summary is given of the current state of knowledge concerning the mechanisms of interaction and the bioeffects of these fields. Additional topics that are discussed include: (1) physical effects on pacemakers and metallic implants such as aneurysm clips, (2) human health studies related to the effects of exposure to nonionizing electromagnetic radiation, and (3) extant guidelines for limiting exposure of patients and medical personnel to the fields produced by NMR devices. On the basis of information available at the present time, it is concluded that the fields associated with the current generation of NMR devices do not pose a significant health risk in themselves. However, rigorous guidelines must be followed to avoid the physical interaction of these fields with metallic implants and medical electronic devices. 476 refs., 5 figs., 2 tabs.
- Research Organization:
- Lawrence Berkeley Lab., CA (USA)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 6201802
- Report Number(s):
- LBL-20053; CONF-8508145-1; ON: DE86002966
- Resource Relation:
- Conference: American Association of Physicists in medicine summer school, Portland, OR, USA, 4 Aug 1985
- Country of Publication:
- United States
- Language:
- English
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MAGNETIC FIELDS
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HEALTH HAZARDS
NUCLEAR MAGNETIC RESONANCE
CARDIAC PACEMAKERS
ELECTROCARDIOGRAMS
ELECTROPHYSIOLOGY
IMPLANTS
MACACUS
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REVIEWS
ANIMALS
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