Contribution
Cross-Spectral Analysis of Gradient-coil Induced Vibration and Sound in Low-field MRI System
* Presenting author
Abstract:
In Magnetic Resonance Imaging during image acquisition, the magnetic fields of gradient coils interfere with the magnetic field of primary magnet and leads to generation of Lorentz forces, causing the gradient coil to vibration. This vibration interacts with the surrounding media which is air and generates the typical sound of MRI. These challenges are associated with low/high field open/closed configuration MRI systems since their development. This study aims to analyse and correlate the vibration and sound characteristics of the low field open configuration MRI, operated under different scanning sequences. Spectral analysis was performed on the recorded signals to examine their characteristics, and the relation between the vibration and sound was evaluated using cross spectral density analysis. Results shown strong correlation between the vibration and sound signal in the frequency range of 100-2000 Hz, with prominent peaks at 1450 Hz for Fast Spin Echo (FSE) and Spin Echo (SE), 335 Hz for Gradient Echo (GRE) sequence. These findings enhance understanding of the dynamic behaviour of MRI-induced vibration and sound, supporting the development of strategies for vibration and noise reduction