TY - GEN
T1 - MRI Acoustic Noise Prediction and Silent Sequence Optimization
AU - Wang, Yulin
AU - Zeng, Jie
AU - Xu, Pengfei
AU - Zhang, Jichang
AU - Ke, Shiying
AU - Niu, Shengyang
AU - Zhu, Yuliang
AU - Che, Shao
AU - Yao, Chendie
AU - Wang, Chengbo
N1 - Publisher Copyright:
© VDE VERLAG GMBH.
PY - 2024
Y1 - 2024
N2 - The large gradient switching-induced Lorentz forces can cause considerable acoustic noise, which is a disadvantage of magnetic resonance scanning, causing patient restlessness and safety risks. This sound should be characterized, predicted, evaluated, and reduced. In this study, the accurate gradient-to-acoustic noise transfer functions of x, y, and z axes gradient coils are measured with white noise input. Based on it, a 4th-order polynomial gradient smoothing function is proposed to reduce high-frequency components, and a genetic algorithm is employed to further optimize parameters to avoid resonance with the scanner. The example 2D gradient recalled echo sequence sound is decreased by 25.28 dBA (94.55%) and image quality is maintained with a negligible difference. This can be applied to various sequences to improve scanning comfort and reduce hearing harm.
AB - The large gradient switching-induced Lorentz forces can cause considerable acoustic noise, which is a disadvantage of magnetic resonance scanning, causing patient restlessness and safety risks. This sound should be characterized, predicted, evaluated, and reduced. In this study, the accurate gradient-to-acoustic noise transfer functions of x, y, and z axes gradient coils are measured with white noise input. Based on it, a 4th-order polynomial gradient smoothing function is proposed to reduce high-frequency components, and a genetic algorithm is employed to further optimize parameters to avoid resonance with the scanner. The example 2D gradient recalled echo sequence sound is decreased by 25.28 dBA (94.55%) and image quality is maintained with a negligible difference. This can be applied to various sequences to improve scanning comfort and reduce hearing harm.
UR - http://www.scopus.com/inward/record.url?scp=85216005279&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85216005279
T3 - BIBE 2024 - Conference Proceedings, 7th International Conference on Biological Information and Biomedical Engineering
SP - 16
EP - 20
BT - BIBE 2024 - Conference Proceedings, 7th International Conference on Biological Information and Biomedical Engineering
A2 - Chen, Xueli
PB - VDE Verlag GmbH
T2 - 7th International Conference on Biological Information and Biomedical Engineering, BIBE 2024
Y2 - 13 August 2024 through 15 August 2024
ER -