Magnetic susceptibility artifacts in magnetic resonance imaging: calculation of the magnetic field disturbances

The interaction between the magnetic field of a magnetic resonance imaging (MRI) machine and ion currents within the inner-ear endolymph results in a Lorentz force. This force produces a pressure that pushes on the cupula within the semicircular canals causing nystagmus and vertigo. Here I discuss several implications of this unique and noninvasive way to stimulate the vestibular system in experimental neurophysiology and clinical neurology.

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The Zurich Checklist for Safety in the Intraoperative Magnetic Resonance Imaging Suite: Technical Note

Operative Neurosurgery ◽

10.1093/ons/opy205 ◽

2018 ◽

Vol 16 (6) ◽

pp. 756-765 ◽

Cited By ~ 4

Author(s):

Martin N Stienen ◽

Jorn Fierstra ◽

Athina Pangalu ◽

Luca Regli ◽

Oliver Bozinov

Keyword(s):

Magnetic Resonance Imaging ◽

Magnetic Field ◽

Magnetic Resonance ◽

High Strength ◽

Technical Note ◽

Patient Transfer ◽

Resonance Imaging ◽

Intraoperative Magnetic Resonance Imaging ◽

Surgical Checklist ◽

The Magnetic Field

Abstract BACKGROUND Recently, the use of intraoperative magnetic resonance imaging (ioMRI) has evolved in neurosurgery. Challenges related to ioMRI-augmented procedures are significant, since the magnetic field creates a potentially hazardous environment. Strict safety guidelines in the operating room (OR) are necessary. Checklists can minimize errors while increasing efficiency and improving workflow. OBJECTIVE To describe the Zurich checklists for safety in the ioMRI environment. METHODS We summarize the checklist protocol and the experience gained from over 300 surgical procedures performed over a 4-yr period using this new system for transcranial or transsphenoidal surgery in a 2-room high-field 3 Tesla ioMRI suite. RESULTS Particularities of the 2-room setting used at our institution can be summarized as (1) patient transfer from a sterile to a nonsterile environment and (2) patient transfer from a zone without to a zone with a high-strength magnetic field. Steps on the checklist have been introduced for reasons of efficient workflow, safety pertaining to the strength of the magnetic field, or sterility concerns. Each step in the checklist corresponds to a specific phase and particular actions taken during the workflow in the ioMRI suite. Most steps are relevant to any 2-room ioMRI-OR suite. CONCLUSION The use of an ioMRI-checklist promotes a zero-tolerance attitude for errors, can lower complications, and can help create an environment that is both efficient and safe for the patient and the OR personnel. We highly recommend the use of a surgical checklist when applying ioMRI.

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The Magnetic Field of Magnetic Resonance Imaging Systems Does Not Affect Cells Labeled with Micrometer-Sized Iron Oxide Particles

Tissue Engineering Part C Methods ◽

10.1089/ten.tec.2017.0118 ◽

2017 ◽

Vol 23 (7) ◽

pp. 412-421 ◽

Cited By ~ 1

Author(s):

Martin Kluge ◽

Annekatrin Leder ◽

Karl H. Hillebrandt ◽

Benjamin Struecker ◽

Dominik Geisel ◽

...

Keyword(s):

Magnetic Resonance Imaging ◽

Magnetic Field ◽

Iron Oxide ◽

Magnetic Resonance ◽

Imaging Systems ◽

Resonance Imaging ◽

Iron Oxide Particles ◽

Oxide Particles ◽

The Magnetic Field

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Cytisine parameters measured in the 1.5 Tesla magnetic field

European Journal of Clinical and Experimental Medicine ◽

10.15584/ejcem.2020.1.3 ◽

2020 ◽

Vol 18 (1) ◽

pp. 16-19

Author(s):

Zuzanna Bober ◽

◽

Sabina Galiniak ◽

Dawid Leksa ◽

Klaudia Dynarowicz ◽

...

Keyword(s):

Magnetic Resonance Imaging ◽

Magnetic Field ◽

Magnetic Resonance ◽

Active Substance ◽

Negative Impact ◽

Point Of View ◽

Organic Chemical ◽

Resonance Imaging ◽

Influence Of Water ◽

The Magnetic Field

Introduction. Cytisine, Cytisinum (C11H14N2O), is an organic chemical compound. Cytisine is heterotricyclic compound that is the toxic principle in Laburnum seeds and is found in many members of the Fabaceae (legume, pea or bean) family. Aim. The aim of the study is to measure the influence of water on the form of drug in the magnetic field 1.5 Tesla. Material and methods. For this purpose, magnetic resonance imaging tests were performed to check the solubility of pure cytisine, Desmoxan tablets and Tabex capsules. Results. From a pharmacological point of view, both Desmoxan tablets and Tabex capsules should exert the same effect on the human body, this is due to the identical content of the active substance, in this case cytisine (1.5 mg). Conclusion. The differences in the results obtained may be related to additional excipients that contain medications, but it is believed that they should not have a negative impact on the action of the active substance.

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