[Intl_DxMedPhys] Rhythmlink MR Conditional Electrodes

[Bob Kobistek]

Gretchen:

If you can’t find anyone on this list with experience with these electrodes, I recommend you get on the Facebook MRI Safety group. It is populated by physicists, radiologists, and techs. It is monitored by well-known MRI safety gurus like Frank Shellock, Manny Kanal, and Toby Gilk. Questions like yours are asked daily.



Robert J. Kobistek, MS, FACR, DABR, MRSE(MRSC™)
Medical Physicist
RJK Medical Physics, Inc.
440-463-7879

From: Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list-bounces+bob=rjkmedphys.com at lists.osu.edu> On Behalf Of Gretchen Raterman Bell via Intl_dxmedphys_wd_osu_list
Sent: Tuesday, June 30, 2026 12:26 PM
To: Gretchen Raterman Bell via Intl_dxmedphys_wd_osu_list <intl_dxmedphys_wd_osu_list at lists.osu.edu>
Subject: [Intl_DxMedPhys] Rhythmlink MR Conditional Electrodes

Dear MedPhys - I got an interesting MRI Safety question this morning regarding the Rhythmlink MR Conditional EEG Electrodes.   They are going live at a facility I cover, and we are finding that the company has some conflicting verbiage in their
Dear MedPhys -

I got an interesting MRI Safety question this morning regarding the Rhythmlink MR Conditional EEG Electrodes.  They are going live at a facility I cover, and we are finding that the company has some conflicting verbiage in their documentation of conditionality.  I've attached the most recent (2025) technical brochure on MR conditionality.

What we are finding confusing is that we've received a previous memorandum from the company stating that there's a 15 minute limit on continuous scanning (within acceptable conditions), which they clarified as per sequence.  This document is from 2017.  However, the attached 2025 document states the following:

[cid:image001.png at 01DD0895.3DC6A200]

And we all know how an exam goes -- little to no time in between sequences.  Then they have an FAQ section at the end that states this:

[cid:image002.png at 01DD0895.3DC6A200]

So I guess I'm wondering if anyone else has looked into this?  What is defined as "a break"?  A minute?  Two minutes?  Depending on how high a SAR the previous sequence was?  I'm currently digging into this, but I wanted to put out the MedPhys bat signal in the meantime.  These are mostly used on pediatric ICU patients, so it's particularly touchy.

Thank you to anyone who can point me in the right direction!!

Gretchen R. Bell, M.S., DABR
Diagnostic Imaging Physicist
Ochsner Medical Center
(504)842-8506
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osu.edu/pipermail/intl_dxmedphys_wd_osu_list/attachments/20260630/6c9e48e4/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.png
Type: image/png
Size: 61366 bytes
Desc: image001.png
URL: <http://lists.osu.edu/pipermail/intl_dxmedphys_wd_osu_list/attachments/20260630/6c9e48e4/attachment.png>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image002.png
Type: image/png
Size: 54724 bytes
Desc: image002.png
URL: <http://lists.osu.edu/pipermail/intl_dxmedphys_wd_osu_list/attachments/20260630/6c9e48e4/attachment-0001.png>