Archive for the ‘MR Safety’ Category

Lululemon clothes: MRI safe?

March 9th, 2016

This recently came across to us, so we thought we would pass it on and remind users of the importance of having subjects be aware of their clothing and suggest that they change into scrubs prior to getting in the scanner if there are any concerns.


“The comfortable, stretch, barely-there yoga pants all girls know and love have metal mesh built into the fabric, which is what helps keep the body dry during exercise. How metal mesh actually helps prevent sweat is a whole other conundrum [ref].”

Of course, shirts and pants are not the only garments to have embedded metals – undergarments are also risky. Beware of the following, which have caused issues:

  • metal threads and buttons in men’s boxer shorts
  • metal stays in women’s bras and other under garments

New ‘MR Unsafe’ contact lens, Triggerfish, used to monitor intraocular pressure

March 9th, 2016

The US Food and Drug Administration (FDA) has approved the Triggerfish (Sensimed AG, contact lens sensor that provides an automated recording of continuous eye pressure changes over the course of 24 hours.

“The Triggerfish gives the clinician 24-hour continuous monitoring of changes in [intraocular pressure (IOP)] patterns that otherwise could not be obtained,” William Maisel, MD, MPH, acting director of the Office of Device Evaluation in the FDA’s Center for Devices and Radiological Health, said in a news release. “This information can help determine the most critical time of day for the clinician to measure the patient’s IOP.”

According to the manufacturer, this device is MR Unsafe.

As stated:
Do not wear the SENSIMED Triggerfish® while exposed to intense electromagnetic fields such as MRI (Magnetic resonance imaging) which could result in severe eye burn.

Michael & the CNI staff