|  | Static Magnetic Field The static magnetic field is generated by a super-conducting magnet. The US, USR and US/R type of magnets are equipped with active shielding to minimize the magnetic field in the outside and the surrounding of the magnet (ultra-shielded magnets). The static magnetic field is highly homogeneous in the magnet bore and drops considerably fast to low magnetic fields outside the bore. The magnetic force that acts to ferromagnetic parts is proportional to the change of the magnetic field strength. In regions, where the magnetic field strength decreases considerably within short distances, the force on ferromagnetic parts can be very strong. As a consequence, such objects become hazardous projectiles, especially in front of the magnet bore. It is an illusion to think that ferromagnetic parts can be handled in a safe way in front of a magnet bore! | | | Dizziness when moving the head at the entrance of the magnet bore Do not move your head at or close to the entrance of the magnet bore. A temporary feeling of drowsiness, dizziness, or metallic taste may result. These effects become stronger the faster the movements are. |
| | Potential damage of devices by strong magnetic field. The magnetic field can - 1.
- erase magnetic data media, e.g. disks, memory sticks, credit cards
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- destroy mechanically-sensitive components, e.g. watches, hearing aids, cameras
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- Always check accessories that shall be used within the Controlled Access Area for compatibility with magnetic fields.
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| | | Risk of personal injury or death by projectiles Ferromagnetic objects introduced into the vicinity of the magnetic field become projectiles. Especially in front of the bore, such objects cannot be controlled and become life-threatening projectiles. - •
- No ferromagnetic material may be brought into the vicinity of a MR magnet. If it is unclear if a device contains ferromagnetic material, do not use in the vicinity of the magnet until compatibility has been proven. Always be aware of the strong and sudden attractive force on ferromagnetic materials mainly at the entrance of the magnet bore.
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- Do not wear or carry ferromagnetic objects on your person or in your pockets, for example watches, pens, scissors, …
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- Do not use gas tanks as for example oxygen, nitrogen, or helium tanks within the Controlled Access Area.
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- Do not use ferromagnetic cleaning tools in the Controlled Access Area.
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- Be especially cautious with sharp or massive objects, i.e. scissors, knives, needles, tools, or non MR compatible animal accessories.
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- Never examine samples that contain ferromagnetic materials.
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| | | Risk of injury and or severe damage of the magnet Accidentally attracted ferromagnetic material stuck in the magnet may be only removed without risk of injury or damage to the system when discharging the magnet. Contact your local Bruker Service. |
| | Risk of injury or death of the animal, destruction of samples Ferromagnetic or electrically-conductive materials inside the sample or object under investigation (i.e. aneurysm-clips, prostheses, shrapnel, metal splinters, needles,...) may dislocate due to the extreme forces exerted by the magnetic field. This may result in severe internal injuries or destruction of the sample. - •
- No animals/samples carrying ferromagnetic implants may be brought into the Controlled Access Area.
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