Publication type: | Article in scientific journal |
Type of review: | Peer review (publication) |
Title: | Optimizing signal-to-noise ratio of high-resolution parallel single-shot diffusion-weighted echo-planar imaging at ultrahigh field strengths |
Authors: | Reischauer, Carolin Vorburger, Robert S. Wilm, Bertram J. Järmann, Thomas Boesiger, Peter |
DOI: | 10.1002/mrm.23057 |
Published in: | Magnetic Resonance in Medicine |
Volume(Issue): | 67 |
Issue: | 3 |
Page(s): | 679 |
Pages to: | 690 |
Issue Date: | Jun-2012 |
Publisher / Ed. Institution: | Wiley |
ISSN: | 0740-3194 1522-2594 |
Language: | English |
Subjects: | Adult; Brain mapping; Computer simulation; Diffusion Magnetic Resonance Imaging; Echo-Planar Imaging; Female; Humans; Image processing, computer-assisted; Male; Models, theoretical; Phantoms, imaging; Signal-to-noise ratio |
Subject (DDC): | 616: Internal medicine and diseases |
Abstract: | The potential signal-to-noise ratio (SNR) gain at ultrahigh field strengths offers the promise of higher image resolution in single-shot diffusion-weighted echo-planar imaging the challenge being reduced T(2) and T(2) * relaxation times and increased B(0) inhomogeneity which lead to geometric distortions and image blurring. These can be addressed using parallel imaging (PI) methods for which a greater range of feasible reduction factors has been predicted at ultrahigh field strengths-the tradeoff being an associated SNR loss. Using comprehensive simulations, the SNR of high-resolution diffusion-weighted echo-planar imaging in combination with spin-echo and stimulated-echo acquisition is explored at 7 T and compared to 3 T. To this end, PI performance is simulated for coil arrays with a variable number of circular coil elements. Beyond that, simulations of the point spread function are performed to investigate the actual image resolution. When higher PI reduction factors are applied at 7 T to address increased image distortions, high-resolution imaging benefits SNR-wise only at relatively low PI reduction factors. On the contrary, it features generally higher image resolutions than at 3 T due to smaller point spread functions. The SNR simulations are confirmed by phantom experiments. Finally, high-resolution in vivo images of a healthy volunteer are presented which demonstrate the feasibility of higher PI reduction factors at 7 T in practice. |
URI: | https://digitalcollection.zhaw.ch/handle/11475/5019 |
Fulltext version: | Published version |
License (according to publishing contract): | Licence according to publishing contract |
Departement: | School of Engineering |
Appears in collections: | Publikationen School of Engineering |
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Reischauer, C., Vorburger, R. S., Wilm, B. J., Järmann, T., & Boesiger, P. (2012). Optimizing signal-to-noise ratio of high-resolution parallel single-shot diffusion-weighted echo-planar imaging at ultrahigh field strengths. Magnetic Resonance in Medicine, 67(3), 679–690. https://doi.org/10.1002/mrm.23057
Reischauer, C. et al. (2012) ‘Optimizing signal-to-noise ratio of high-resolution parallel single-shot diffusion-weighted echo-planar imaging at ultrahigh field strengths’, Magnetic Resonance in Medicine, 67(3), pp. 679–690. Available at: https://doi.org/10.1002/mrm.23057.
C. Reischauer, R. S. Vorburger, B. J. Wilm, T. Järmann, and P. Boesiger, “Optimizing signal-to-noise ratio of high-resolution parallel single-shot diffusion-weighted echo-planar imaging at ultrahigh field strengths,” Magnetic Resonance in Medicine, vol. 67, no. 3, pp. 679–690, Jun. 2012, doi: 10.1002/mrm.23057.
REISCHAUER, Carolin, Robert S. VORBURGER, Bertram J. WILM, Thomas JÄRMANN und Peter BOESIGER, 2012. Optimizing signal-to-noise ratio of high-resolution parallel single-shot diffusion-weighted echo-planar imaging at ultrahigh field strengths. Magnetic Resonance in Medicine. Juni 2012. Bd. 67, Nr. 3, S. 679–690. DOI 10.1002/mrm.23057
Reischauer, Carolin, Robert S. Vorburger, Bertram J. Wilm, Thomas Järmann, and Peter Boesiger. 2012. “Optimizing Signal-to-Noise Ratio of High-Resolution Parallel Single-Shot Diffusion-Weighted Echo-Planar Imaging at Ultrahigh Field Strengths.” Magnetic Resonance in Medicine 67 (3): 679–90. https://doi.org/10.1002/mrm.23057.
Reischauer, Carolin, et al. “Optimizing Signal-to-Noise Ratio of High-Resolution Parallel Single-Shot Diffusion-Weighted Echo-Planar Imaging at Ultrahigh Field Strengths.” Magnetic Resonance in Medicine, vol. 67, no. 3, June 2012, pp. 679–90, https://doi.org/10.1002/mrm.23057.
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