A team of MED engineers recently attended the ORS 2016 Annual Meeting. The meeting was held in Orlando, Florida, at Disney’s Coronado Springs Resort. One of our engineers found herself a little overwhelmed by her first visit to Disney, reporting from the conference that “being on the Disney campus feels like being in a Las Vegas casino. I don’t know where I am or how to get out. So I’m spending money and making bad decisions (e.g., feeding French fries to ducks).”
But seriously, folks, the conference was fine. We presented an overview of MR safety evaluation of orthopedic devices, highlighting how to select test device configurations for assessments of magnetically-induced displacement force, magnetically-induced torque, radiofrequency-induced heating, and image artifact. We also had several great conversations with orthopedic researchers, learning about cutting edge technologies and beginning conversations on how we can help bring these technologies to market.
Back to the ducks…does anyone have any leftover French fries? We spotted some ducks in our parking lot last week. Is it possible these are feathered friends from Orlando? Have they migrated to Indiana in search of a snack?
Earlier this month MED Institute exhibited at the 2016 Association of University Technology Managers (AUTM) meeting in San Diego. This meeting allows industry dealmakers and investors to network with nearly every academic research institution in the world in one place, at one time. Although this was our first time as an exhibitor, we were able to catch up with several “old friends” at the meeting. One of the areas in which MED has been able to make the biggest impact on innovation is at the Tech Transfer & Innovation Center level. There is no shortage of brilliant minds and exceptional technology at the university level. Unfortunately, those technologies can linger in portfolios due to a lack of resources needed to advance the technology to a point of licensing or commercialization. This is where MED can make a difference.
MED was started more than 30 years ago with the premise of taking an idea from a cocktail napkin drawing to a fully approved medical device. Partnering with leading universities both inside and outside the US has been one of our biggest successes. We have been able to help our clients either sell, or license, or take their projects through the regulatory approval process. With the vast IP portfolios that many institutions possess, MED can assist in taking an idea from paper to a finished product that helps patients.
Regarding MRI safety, testing the radio-frequency-induced heating of implanted medical devices is important to prevent harm to patients during MR imaging. ASTM F2182 was developed to describe methods for performing these tests. If the medical device has a complicated structure, where on the device should you measure the temperature? The standard doesn’t say.
To answer this question, MED Institute has developed computational methods for predicting RF-induced heating on complicated structures such as inferior vena cava (IVC) filters.
Using an IVC filter as an example, a finite element model of the RF coil and the filter simulates the electrical field and resultant heating of the human tissue adjacent to the device. The computational analysis using COMSOL Multiphysics® provides a temperature map of the device so that the worst case location of heating can be determined. Physical testing may then be performed with the temperature probes placed at the identified worst case heating locations. In this case, the analysis indicated that the greatest temperature rise caused by the presence of the IVC filter would be in the tissue near the hook. The experimental temperature increase results agreed with the computational analysis results.
On the basis of this safety evaluation, the IVC filter was able to be marked as MR Conditional—it is safe for MR scanning under defined conditions.
COMSOL Multiphysics is a registered trademark of COMSOL AB.
For more information, please visit our website www.medinstitute.com.