Alternating Magnetic Fields Illustration (VIDEO) UT Southwestern Medical Center This video is under embargo. Please login to access this video. Caption This is an illustration of how alternating magnetic fields can be used to destroy bacterial biofilm on artificial joints. Credit UT Southwestern Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.