Modal Analysis of a Single-layered Gradient Coil Insert for a 4T MRI
Gazdzinski C, Mechefske C, Fenglin W, Rutt B
Robarts Research Institute
Ongoing developments of magnetic resonance imaging technology have lead to high acoustic noise in and around MRI scanners. Many important factors, including the structural dynamic properties, contribute to the vibro-acoustic problem. A non thin-walled dynamic model with the geometric ratio of 8.25 was developed based on modified Loves governing equations. Experimental modal testing on the gradient coil insert was conducted. Remote laser measurements of the gradient coil during scanning in a 4T MRI were carried out. The measured results not only validate the analytical model, but also disclose the real dynamic behavior of the gradient coil during scanning.