• Object ID: 00000018WIA30B12870GYZ
  • Topic ID: id_40025633 Version: 1.3
  • Date: Jul 26, 2022 1:13:04 PM

Exclusion Zone

The Exclusion Zone begins at the 5-gauss line. Magnetic shielding may, however, restrict the 5-gauss line to the magnet room, making the security and the exclusion zone the same.

Figure 1. Exclusion Zone, 1 = 5 gauss line

Static magnetic field plots for siting (rule of thumb - assumes no ferromagnetic materials) may be found at:

http://www.gehealthcare.com/company/docs/siteplanning.html#mr

All personnel should be aware of the gauss line and actively screen the changing conditions of the environment. There are gauss lines and equipment that must remain outside certain limits. Consult your GE Service Engineer to know where these gauss lines are located in your facility.

Exclusion Zone warning sign

The Exclusion Zone Warning Sign alerts personnel and patients of the following:

  • Strong magnetic field
  • No pacemakers*
  • No neurostimulators*
  • No conductive/metallic implants*
    • Persons with pacemakers, neurostimulators or metallic implants must not enter this area. Serious injury may result.

*In general, patients with conductive (e.g. metallic) implants are contraindicated for MR scans. Some implantable devices have been labeled as MR Conditional under certain operating conditions. Only use quadrature transmit for MR Conditional devices. MR Safe implants will have the MR Safe symbol in their implant documentation.

When evaluating whether to proceed with MR scanning on patients with such implants, consult the implantable device’s labeling.

Figure 2. Exclusion zone warning sign
Note: Your system may have a slight variation of this sign.