Ramez E. N. Shehada1, Rohan More1, Reza Imani1, Wudi Zhou1, Micah Meulmester1, Benjamin Coppola1, Jon Dietrich1, Richard Williamson1, Ali Dianaty1
1CRMD, St. Jude Medical, Sylmar, CA, United States
Gradient-induced vibrations can fatigue the components of MRI-conditional active-implantable medical devices (AIMD) leading to their failure. A non-contact vibrometer was used in a special fixture to measure the vibrations of various AIMD components in clinical 1.5T MRI scanners. The frequency range of the vibrations ranged from 0-2kHz with a maximum displacement of 25um. The vibration values were then programmed into a computerized shaker-table that was used to aggressively vibrate the AIMD for longer periods of time after which the AIMD was checked for damage. This study presents a new method for characterizing the vibrations and assessing their effects on AIMD.