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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</div>
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<div dir="ltr"><div>Dear MedPhys -</div><div><br></div><div>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.</div><div><br></div><div>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 <i>per sequence</i>. This document is from 2017. However, the attached 2025 document states the following:</div><div><br></div><div><img src="cid:ii_mr0ugjs11" alt="image.png" width="329" height="406"></div><div><br></div><div>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:</div><div><br></div><img src="cid:ii_mr0ujxs02" alt="image.png" width="542" height="101"><br><div><br></div><div>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.<br></div><div><br></div><div>Thank you to anyone who can point me in the right direction!!</div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><p style="text-align:left"><font face="tahoma, sans-serif"><span style="font-size:small">Gretchen R. Bell, M.S., DABR</span><br><font size="2">Diagnostic Imaging Physicist</font><br><font size="2">Ochsner Medical Center</font><br><font size="2">(504)842-8506</font></font></p>
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