title: Evaluation of MRI issues at 3-Tesla for a hospital identification (ID) wristband.
abstract: OBJECTIVE
  A recent report suggested that a serious burn injury was due to the presence of the identification (ID) wristband. As such, in lieu of removing or padding hospital ID wristbands in all patients prior to magnetic resonance imaging (MRI), testing may be performed to characterize risks for ID wristbands. Therefore, the purpose of this investigation was to evaluate the magnetic field interactions, heating and artifacts at 3 T for a hospital ID wristband.
  
  
  METHODS
  Standardized test methods were used to evaluate magnetic field interactions, MRI-related heating, and artifacts at 3 T for a hospital ID wristband.
  
  
  RESULTS
  There were no magnetic field interactions. MRI-related heating evaluated at a relatively high, MR system-reported, whole body-averaged specific absorption rate (2.9 W/kg) did not increase above the background level. The artifacts related to the ink used for printing were "small" for one toner and "large" for the other in relation to the dimensions of the printing.
  
  
  CONCLUSIONS
  Based on the tests performed, this particular hospital ID wristband is considered MR safe and will not pose a hazard to a patient undergoing an MRI examination. Importantly, it is not necessary to remove this item for a patient referred for MRI.
authors: Loyola-Marymount University, Los Angeles, CA 90045, USA.
authors: Morgan
authors: M
authors: Oliver-Allen
authors: Sam
authors: S
authors: Valencerina
authors: Frank G
authors: FG
authors: Shellock
mesh_terms: D002056:Burns / Q000209:etiology / Q000517:prevention & control*; D004868:Equipment Failure; D019544:Equipment Failure Analysis / Q000379:methods; D006358:Hot Temperature; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000009:adverse effects* / Q000295:instrumentation*; D010355:Patient Identification Systems; D014953:Wrist