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Related Experiment Videos

[Do strong static magnetic fields in NMR tomography modify tissue perfusion?].

C Stick1, K Hinkelmann, P Eggert

  • 1Institut für angewandte Physiologie und medizinische Klimatologie, Christian-Albrechts-Universität, Kiel.

Rofo : Fortschritte Auf Dem Gebiete Der Rontgenstrahlen Und Der Nuklearmedizin
|March 1, 1991
PubMed
Summary

Strong static magnetic fields, like those in Magnetic Resonance Imaging (MRI), do not affect tissue perfusion. Studies show no changes in skin or forearm blood flow when exposed to MRI-strength magnetic fields.

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Area of Science:

  • Biomedical Engineering
  • Physiology

Context:

  • Magnetic Resonance Imaging (MRI) utilizes strong static magnetic fields.
  • Concerns exist regarding the potential physiological effects of these fields on tissue perfusion.
  • Previous research in humans and animals has prompted further investigation.

Purpose:

  • To investigate the impact of strong static magnetic fields on human tissue perfusion.
  • To determine if MRI-strength magnetic fields alter skin and forearm blood flow.

Summary:

  • Two studies measured skin blood flow (thumb) and forearm blood flow in 20 subjects using heat clearance and venous occlusion plethysmography.
  • Subjects were exposed unilaterally to magnetic fields of 0.9-1 T (thumb) and 0.4-0.5 T (forearm).
  • Blood flow was compared during magnetic field exposure to periods before and after, and to the contralateral limb, revealing no significant changes.

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Impact:

  • Provides evidence that MRI-compatible magnetic field strengths do not adversely affect local tissue perfusion.
  • Reassures patients and clinicians about the safety of MRI procedures concerning blood flow dynamics.
  • Contributes to the understanding of bioeffects of static magnetic fields in medical imaging.