MRI protector

  • US 20030171669A1
  • Filed: 03/11/2002
  • Published: 09/11/2003
  • Est. Priority Date: 03/11/2002
  • Status: Active Grant
First Claim
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1. An access opening in a shielded room housing an MRI apparatus, said opening having a doorway, a detector adapted to be mounted at the access doorway, said detector comprising an array of Hall effect sensors each having an output, said sensors oriented to scan the magnetic field generated by the MRI apparatus and passing through the access doorway, said sensors detecting the introduction of ferrous articles into said magnetic field, the outputs of said sensors connected to an alarm system, said alarm system generating a warning to personnel.

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