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Hr imaging and vascular access ports: Ex vivo evaluation of ferromagnetism, heating, and artifacts at 1.5 t
Author(s) -
Shellock Frank G.,
Nogueira Marcia,
Morisoli Stacy
Publication year - 1995
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.1880050421
Subject(s) - ex vivo , ferromagnetism , radiology , medicine , biomedical engineering , nuclear medicine , medical physics , materials science , in vivo , physics , biology , condensed matter physics , microbiology and biotechnology
The purpose of our study was to asacsa Futomagneh. hating. ad artifactr, associated with vabcular access ports exposed to a 1.5‐T MR system. Tweaty‐cight different vabcular access port. were evaluated in thb investlgation. Fmmagnetism was determined by using two previouely de techniques. Temperature changes were measured immediately before and after performing a pulse sequence on the vascular access port6 for 80 min at a speciflc absorption rate of 3.1 W/kg. Artifacts were assessed h aesoclation with the use of a fht CRASS pulse sequence. None of the vascular access ports displayed ferromnlpletim. Heating was 0.2°or less. The prerence of adhcts varied. depending on the component materials. The Lack of fcrromagnetiam and negligible heating indicates that MR imaging performed at 1.6 T or lees may be conducted dely in patients with any of the vascular access port. tested. None of the associated artifacts produced by the vascdar access port. is comddercd to paw a rubsttantial problem for MR imaging.