Active-passive gradient shielding for MRI acoustic noise reduction

Magnetic Resonance in Medicine

Volumn 53, Issue 5, 2005, Pages 1013-1017

  Edelstein, William A ^a,b   Kidane, Tesfaye K ^b   Taracila, Victor ^b   Baig, Tanvir N ^b   Eagan, Timothy P ^b   Cheng, Yu Chung N ^b,d   Brown, Robert W ^b   Mallick, John A ^c  

^a MRScience LLC   (United States)

^b CASE WESTERN RESERVE UNIVERSITY   (United States)

^c UNIVERSITY OF TEXAS AT AUSTIN   (United States)

^d WAYNE STATE UNIVERSITY   (United States)

Author keywords

Acoustic noise; Acoustic noise reduction; Acoustics; Active shielding; Active passive shielding; Actively shielded gradients; Gradients; MRI acoustic noise; MRI acoustic noise reduction; Noise reduction

Indexed keywords

ACOUSTICS; MAGNETS; NOISE ABATEMENT; SHIELDING;

ACOUSTIC NOISE SOURCES; ACTIVE SHIELDING; ACTIVELY SHIELDED GRADIENTS; GRADIENT ASSEMBLIES; GRADIENTS; MECHANICAL POWER; NOISE PRODUCTION; PASSIVE SHIELDING;

ACOUSTIC NOISE;

COPPER;

ACOUSTICS; ARTICLE; CALCULATION; FINITE ELEMENT ANALYSIS; NOISE REDUCTION; NUCLEAR MAGNETIC RESONANCE IMAGING; VACUUM; VIBRATION;

EID: 18244379330     PISSN: 07403194     EISSN: None     Source Type: Journal    
DOI: 10.1002/mrm.20472     Document Type: Article

References (16)

1. Sellers MB, Pavlidis JD, Carlberger T. MRI acoustic noise. Int J Neuroradiol 1996;2:549-560.
2. Foster JR, Hall DA, Summerfield AQ, Palmer AR, Bowtell RW. Sound-level measurements and calculations of safe noise dosage during EPI at 3 T. J Magn Reson Imaging 2000;12:157-163.
3. Edelstein WA, Hedeen RA, Mallozzi RP, El-Hamamsy SA, Ackermann RA, Havens TJ. Making MRI quieter. Magn Reson Imaging 2002;20:155-163.
4. Katsunuma A, Takamori H, Sakakura Y, Hamamura Y, Ogo Y, Katayama R. Quiet MRI with novel acoustic noise reduction. Magn Reson Mater Phys Biol Med 2002;13:139-144.
5. Edelstein WA, Kidane TK, Taracila V, Baig TN, Eagan TP, Cheng Y-CN, Brown RW, Mallick JA. Active-passive gradient shielding for MRI acoustic noise reduction. In: Proceedings of the 12th Annual Meeting of ISMRM, Kyoto, Japan, 2004. p 747.
6. Chapman B, Mansfield P. Double active magnetic screening of coils in NMR. J Phys D Applied Phys 1986;19:L129-L131.
7. Bowtell R, Crozier S, Beck B, Blackband S. Multi-layer transverse gradient coils. In: Proceedings of the 7th Annual Meeting of ISMRM, Philadelphia, 1999. p 468.
8. Leggett J, Crozier S, Bowtell R. Actively shielded multi-layer gradient coils optimised for cooling. In: Proceedings of the 11th Annual Meeting of ISMRM, Toronto, Canada, 2003. p 2418.
9. Turner R, Bowley RM. Passive screening of switched magnetic field gradients. J Phys E: Sci Instrum 1986;19:876-879.
10. Mulder GBJ, Ham CLG, Mateboer AJ, Roozen NB, Verbunt JPM. MRI apparatus with a mechanically integrated eddy current shield in the gradient system. USA patent 6,326,788;2001. Philips Corporation, assignee.
11. Edelstein WA, El-Hamamsy SA, Schenck JF, Barber WD, Gross DA. Calculation of time-dependent, gradient-induced axisymmetric eddy currents and fields. In: Proceedings of the 5th Annual Meeting of ISMRM, Vancouver, Canada, 1997. p 1472.
12. Ansoft. 2003. Maxwell SV. http://www.ansoft.com/maxwellsv/.
13. Ansoft. 2003. Maxwell 3D. http://www.ansoft.com/products/em/max3d/.
14. Hedeen RA, Edelstein WA. Characterization and prediction of gradient acoustic noise in MR imagers. Magn Reson Med 1997;37:7-10.
15. Mechefske CK, Geris R, Gati JS, Rutt BK. Acoustic noise reduction in a 4 T MRI scanner. Magn Reson Mater Phys Biol Med 2002;13:172-176.
16. Silverman A. 1997. Acoustics FAQ. http://www.faqs.org/faqs/physics-faq/ acoustics/.