ArticleMagnetic resonance in medicine2024
Acoustic noise reduction in the NexGen 7 T scanner.
Article in Magnetic resonance in medicine, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed.
- Measuring the vibrational response of a high performance gradient coil.Magnetic resonance imaging · 2026Article
- Design of an 8-Channel Transmit 32-Channel Receive 11.7T Head Coil and Evaluation of SNR Gains.Magnetic resonance in medicine · 2026Article
- Magnetic resonance imaging.Science advances · 2026Review
- Timing Is Everything: How Subtle Timing Changes in MRI Echo Planar Imaging Can Significantly Alter Mechanical Vibrations and Sound Level.Magnetic resonance in medicine · 2026Article
- Reassessment of peripheral nerve stimulation thresholds for the Impulse model-optimized asymmetric head gradient coil.Magnetic resonance in medicine · 2025Article
- Engineering clinical translation of OGSE diffusion MRI.Magnetic resonance in medicine · 2025Review
- 500 MHz Inductive Birdcage RF Coil for Brain MRI: Design, Implementation and Validation.IEEE transactions on bio-medical engineering · 2025Article
Corrections and comments
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Authors and funding
7 authors.
Funding
Abstract
purposeDriven by the Lorentz force, acoustic noise may arguably be the next physiological challenge associated with ultra-high field MRI scanners and powerful gradient coils. This work consisted of isolating and mitigating the main sound pathway in the NexGen 7 T scanner equipped with the investigational Impulse head gradient coil.
methodsSound pressure level (SPL) measurements were performed with and without the RF coil to assess its acoustic impact. Vibration measurements were carried out on the gradient coil, the RF coil, and on the patient table to distinguish the different vibration mechanisms and pathways. Vibrations of the RF coil were modified by either making contact with the patient bore liner with padding material or by changing directly the RF shield with phosphor bronze mesh material.
resultsSPL and vibration measurements demonstrated that eddy-currents induced in the RF shield were the primary cause of acoustic noise. Replacing the conventional solid copper shield with phosphor bronze mesh material altered the vibrations of the RF shield and decreased SPL by 6 to 8 dB at the highest frequencies in EPI, depending on the gradient axis, while boosting the transmit B
conclusionThis study demonstrates the potential importance of eddy-current induced vibrations in the RF coil in terms of acoustic noise and opens new horizons for mitigation measures.
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