Acoustic-noise-optimized diffusion-weighted imaging

Ott M, Blaimer M, Grodzki DM, Breuer FA, Roesch J, Dörfler A, Heismann B, Jakob PM (2015)

Publication Type: Journal article

Publication year: 2015

Journal

Magnetic Resonance Materials in Physics Biology and Medicine Springer Verlag (Germany)

Book Volume: 28

Pages Range: 511-21

Journal Issue: 6

DOI: 10.1007/s10334-015-0492-5

Abstract

This work was aimed at reducing acoustic noise in diffusion-weighted MR imaging (DWI) that might reach acoustic noise levels of over 100 dB(A) in clinical practice.A diffusion-weighted readout-segmented echo-planar imaging (EPI) sequence was optimized for acoustic noise by utilizing small readout segment widths to obtain low gradient slew rates and amplitudes instead of faster k-space coverage. In addition, all other gradients were optimized for low slew rates. Volunteer and patient imaging experiments were conducted to demonstrate the feasibility of the method. Acoustic noise measurements were performed and analyzed for four different DWI measurement protocols at 1.5T and 3T.An acoustic noise reduction of up to 20 dB(A) was achieved, which corresponds to a fourfold reduction in acoustic perception. The image quality was preserved at the level of a standard single-shot (ss)-EPI sequence, with a 27-54 % increase in scan time.The diffusion-weighted imaging technique proposed in this study allowed a substantial reduction in the level of acoustic noise compared to standard single-shot diffusion-weighted EPI. This is expected to afford considerably more patient comfort, but a larger study would be necessary to fully characterize the subjective changes in patient experience.

Authors with CRIS profile

Arnd Dörfler Department of Neuroradiology

Involved external institutions

MRB Forschungszentrum für Magnet-Resonanz-Bayern e.V / MRB Research Center for Magnetic-Resonance-Bavaria DE Germany (DE) Siemens AG, Healthcare Sector DE Germany (DE) Julius-Maximilians-Universität Würzburg DE Germany (DE)

How to cite

APA:

Ott, M., Blaimer, M., Grodzki, D.M., Breuer, F.A., Roesch, J., Dörfler, A.,... Jakob, P.M. (2015). Acoustic-noise-optimized diffusion-weighted imaging. Magnetic Resonance Materials in Physics Biology and Medicine, 28(6), 511-21. https://doi.org/10.1007/s10334-015-0492-5

MLA:

Ott, Martin, et al. "Acoustic-noise-optimized diffusion-weighted imaging." Magnetic Resonance Materials in Physics Biology and Medicine 28.6 (2015): 511-21.

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