Controlled Access Area
The Controlled Access Area is the three-dimensional area in which the magnetic field strength is 0.5 mT and higher. It is defined by the 0.5 mT magnetic stray field line of the magnet. The contour maps of the magnetic stray field are provided in the System Owner Manual.
System owner or authorized personnel must ensure that individuals entering the Controlled Access Area must put down all loose ferromagnetic objects and must be questioned about their medical history (e. g. with respect to pace-makers, surgical implants, metal splinters, etc.).
Individuals with implants (e.g. cardiac pacemakers, clips, prostheses, etc.) are not allowed to enter the Controlled Access Area and pass beyond this 0.5 mT contour line.
It is the responsibility of the system owner to inform all users about applicable national and local regulations and occupational standards.
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Risk of personal injury or death due to effects originating from strong magnetic fields. Entering the Controlled Access Area bears various risks that can lead to serious injuries. People with medical implants or pacemakers must not enter the Controlled Access Area. - •
- Refuse and prevent actively people carrying medical implants entering the Controlled Access Area.
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- Refuse and prevent actively non-authorized and or non-trained personnel entering the Controlled Access Area. Inform visitors on the potential risk originating from the high magnetic field. Do not leave visitors unattended.
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- Be familiar with the extension of the 0.5 and 3 mT region within the Controlled Access Area.
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- Always reflect and be aware of the potential risks when entering the Controlled Access Area. Accidents occur often by being unthoughtful or careless during routine work in the Controlled Access Area.
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- It is good practice to establish a standard procedure when entering the Controlled Access Area and depose all personal accessories outside that might be affected or become dangerous projectiles.
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Risk of personal injury or death The magnetic field of the superconducting magnet remains on even when the MR instrument is powered off. - •
- All safety measures associated with the Controlled Access Area have to be observed even when the MR instrument is powered off.
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The following warning and prohibition signs are attached at the entrance of the Controlled Access Area.
Meaning of warning signs at the entry of the Controlled Access Area
Meaning of prohibitions signs at the entry of the Controlled Access Area
| No entry for persons with cardiac pacemakers, defibrillators, hearing aids, insulin pumps, dosage devices for medication |
| No entry for persons with metallic implants and other metal objects in the body |
| Do not enter with any ferromagnetic devices such as keys, coins, watches, pocket calculators and mobile phones |
| Do not enter with ferromagnetic objects like fire extinguishers or pressure gas cylinder |
| Do not enter with any ferromagnetic devices such as medical instruments of all types |
| Data carriers, such as credit cards, memory sticks, hard drives and identity cards might be damaged |
| Do not enter with ferromagnetic tools of any kind |
| Do not enter with ferromagnetic charts or trolleys of any kind |
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Malfunction of laboratory equipment sensitive to magnetic fields Within the Controlled Access Area, the MR instrument can - 1.
- interfere with electronic devices so that they might not work as intended
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- be influenced by electronic devices so that image quality can be affected
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- Always check accessories located in the Controlled Access Area for MR compatibility.
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| Exposure to magnetic fields It is recommended not to stay inside the magnet room during MR scans. In case specific experiments require personnel to stay close to the magnet for prolonged time while scanning or preparing experimental setups, ensure compliance with occupational standards (worker protection). |
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iPhone 7 or higher becomes temporarily unusable or even damaged. New iPhone generations (from iPhone 7 up) are very sensitive to environments with increased Helium concentrations and can become temporarily unusable or even damaged. - 1.
- In addition to the risk of damage by the magnetic field, increased He concentrations may occur in the Controlled Access Area or during service activities.
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- Leave mobile phone outside the Controlled Access Area.
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- Especially during service actions of charging/discharging the magnet or filling He, mobile phones need to remain outside areas where He concentration may become increased.
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- In case of problems with the iPhone, follow the corresponding instructions in the iPhone User Manual.
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