Document Detail

Safety and reliability of Radio Frequency Identification Devices in Magnetic Resonance Imaging and Computed Tomography.
MedLine Citation:
PMID:  20205829     Owner:  NLM     Status:  PubMed-not-MEDLINE    
BACKGROUND: Radio Frequency Identification (RFID) devices are becoming more and more essential for patient safety in hospitals. The purpose of this study was to determine patient safety, data reliability and signal loss wearing on skin RFID devices during magnetic resonance imaging (MRI) and computed tomography (CT) scanning.
METHODS: Sixty RFID tags of the type I-Code SLI, 13.56 MHz, ISO 18000-3.1 were tested: Thirty type 1, an RFID tag with a 76 x 45 mm aluminum-etched antenna and 30 type 2, a tag with a 31 x 14 mm copper-etched antenna. The signal loss, material movement and heat tests were performed in a 1.5 T and a 3 T MR system. For data integrity, the tags were tested additionally during CT scanning. Standardized function tests were performed with all transponders before and after all imaging studies.
RESULTS: There was no memory loss or data alteration in the RFID tags after MRI and CT scanning. Concerning heating (a maximum of 3.6 degrees C) and device movement (below 1 N/kg) no relevant influence was found. Concerning signal loss (artifacts 2 - 4 mm), interpretability of MR images was impaired when superficial structures such as skin, subcutaneous tissues or tendons were assessed.
CONCLUSIONS: Patients wearing RFID wristbands are safe in 1.5 T and 3 T MR scanners using normal operation mode for RF-field. The findings are specific to the RFID tags that underwent testing.
Thomas Steffen; Roger Luechinger; Simon Wildermuth; Christian Kern; Christian Fretz; Jochen Lange; Franc H Hetzer
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Publication Detail:
Type:  Journal Article     Date:  2010-02-02
Journal Detail:
Title:  Patient safety in surgery     Volume:  4     ISSN:  1754-9493     ISO Abbreviation:  Patient Saf Surg     Publication Date:  2010  
Date Detail:
Created Date:  2010-03-08     Completed Date:  2011-07-14     Revised Date:  2011-11-21    
Medline Journal Info:
Nlm Unique ID:  101319176     Medline TA:  Patient Saf Surg     Country:  England    
Other Details:
Languages:  eng     Pagination:  2     Citation Subset:  -    
Department of Surgery, Hospital of the Canton of St Gallen (KSSG), CH-9007 St Gallen, Switzerland.
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