Quirk, James via groups.io schrieb:
For additional info on a
particular type, you can check
https://www.mrisafety.com/TMDL_list.php
, which maintains a (clinically-oriented) listing of the
MR-compatibility for various devices and implants.
impressive list, "357 Magnum Smith & Wesson is NOT safe in an MRI" ;-)
I'd guess what is safe IN an MRI (typically up to 1.5 T today?) is definitively safe around an NMR magnet (< 1 T for users).
IUDs are less massive than a Smith & Wesson, although both are unlikely to come with an "implant pass". Things like earrings, belt buckles, ball point pens, spectacle frames, keys etc. can usually be ignored, because the overall weight of ferromagnetic material content is too small to cause any visible (earrings hanging sideways), much less dangerous effects.
We explicitly mention "active and passive implants" in our safety
briefings, and sometimes I'm getting feedback / questions about
other implants. IDUs ... I'm not sure how massive these Chinese
models are. Never had any questions asked, nor complaints so far.
Either they are less popular here, or people might not realize that
an IUD is still a sort of "implant" ...
Maybe I should include it explicitly in the list, so that people
become aware of it and ask.
Ciao,
gg
--
PD Dr. Gerd Gemmecker
Bayerisches NMR-Zentrum
NAT School, TU München
Lichtenbergstr. 4
D-85747 Garching
Germany
Raum/Room 2108 / BNMRZ, E.O.Fischer-Str. 2
Tel. +49 (89) 289-52604
Fax +49 (89) 289-52669
e-mail: Gerd.Gemmecker_at_ch.tum.de
Internet: http://www.gemmecker.de
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Received on Mon Jul 07 2025 - 14:15:31 MST