Icon System Manual T02985_02_03 27
Safety (English)
of accessory devices.
Risk of personal injury to operating personnel.
Route cables/tubes such as anesthesia gas tube or water tubes of the animal
warming unit such that it is not possible to trip over them.
3.6 Static and Electromagnetic Fields
A MRI system consists of several components that produce various electromagnetic fields.
Electromagnetic radiation may cause harm to the operator as well as affect the
surrounding environment. The following topics will be addressed:
1. Static magnetic field: The magnet provides a strong time-invariant magnetic field
called static magnetic field.
2. Gradient fields: Time-dependent magnetic fields.
3. Radio frequency fields: RF Coils driven by RF power amplifiers produce pulsed high
frequency electromagnetic fields.
A controlled access area (sometimes referred to as exclusion zone) is defined by the
0.5 mT contour line of the static magnetic field.
3.6.1 Static Magnetic Field
The static magnetic field is generated by a shielded 1 Tesla permanent magnet to
minimize the surrounding fringe field. The static magnetic field is highly homogeneous
Occupational standards
Ensure that occupational standards are taken into account while preparing experimental
setups or while scanning.
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