NDLI: MRI Scanner Vibration and Acoustic Noise

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Chris, K. Mechefske
Copyright Year	2005
Abstract	To characterize the vibration properties as well as the acoustic noise properties of the gradient coil, a finite element (FE) model was developed using the dimensional design specifications of an available gradient coil insert and the concentration of the copper windings in the coil. This FE model was then validated using experimentally collected vibration data (experimental modal testing of the gradient coil in a free-free state (no boundary constraints)). Based on the validated FE model, boundary conditions (supports) were added to the model to simulate the operating condition when the gradient coil insert is in place in an MRI machine. Vibration analysis results from the FE model were again validated through experimental vibration testing, this time with the gradient coil insert installed in the MRI scanner and excited using swept sinusoidal time waveforms. The simulation results from the computational acoustic noise model were also validated through experimental noise measurement from the gradient coil insert in the MRI scanner using swept sinusoidal time waveform inputs. Comparisons show that the FE model predicts the vibration properties and the computational acoustic noise model predicts the noise characteristic properties extremely accurately.
Sponsorship	Design Engineering Division and Computers and Information in Engineering Division
Starting Page	2575
Ending Page	2585
Page Count	11
File Format	PDF
ISBN	0791847381
DOI	10.1115/DETC2005-84246
e-ISBN	0791837661
Volume Number	Volume 1: 20th Biennial Conference on Mechanical Vibration and Noise, Parts A, B, and C
Conference Proceedings	ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
Language	English
Publisher Date	2005-09-24
Publisher Place	Long Beach, California, USA
Access Restriction	Subscribed
Subject Keyword	Vibration Acoustics Machinery Noise (sound) Design Finite element model Simulation results Magnetic resonance imaging Boundary-value problems Finite element analysis Copper Testing Vibration analysis
Content Type	Text
Resource Type	Article

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