Influence of SENSE on image properties in high-resolution single-shot echo-planar DTI

Järmann, Thomas; Pruessmann, Klaas; Valavanis, A.; Kollias, S.; Boesiger, Peter

doi:10.1002/mrm.20769

Publication type:	Article in scientific journal
Type of review:	Peer review (publication)
Title:	Influence of SENSE on image properties in high-resolution single-shot echo-planar DTI
Authors:	Järmann, Thomas Pruessmann, Klaas Valavanis, A. Kollias, S. Boesiger, Peter
DOI:	10.1002/mrm.20769
Published in:	Magnetic Resonance in Medicine
Volume(Issue):	55
Issue:	2
Page(s):	335
Pages to:	342
Issue Date:	2006
Publisher / Ed. Institution:	Wiley
ISSN:	0740-3194 1522-2594
Language:	English
Subjects:	Arteriovenous malformations; Artifacts; Brain mapping; Computer Simulation; Diffusion Magnetic Resonance Imaging; Humans; Computer-assisted image processing; Echo-planar imaging
Subject (DDC):	616: Internal medicine and diseases
Abstract:	Limited spatial resolution is a key obstacle to the study of brain white matter structure with diffusion tensor imaging (DTI). In its frequent implementation with single-excitation spin-echo echo-planar sequences, DTI's ability to resolve small structures is strongly restricted by T2 and T2* decay, B0 inhomogeneity, and limited signal-to-noise ratio (SNR). In this work the influence of sensitivity encoding (SENSE) on diffusion-weighted (DW) image properties is investigated. Computer simulations showed that the PSF becomes narrower with increasing SENSE reduction factors, R, enhancing the intrinsic resolution. After a brief theoretical discussion, we describe the estimation of SNR on a pixel-by-pixel basis as a function of R. The mean image SNR behavior is manifold: SENSE is capable of increasing SNR efficiency by reducing the echo time (TE). Each SNR(R) curve reveals a maximum that depends on the amount of partial Fourier encoding used. The overall best SNR efficiency for an eight-element head coil array and a b-factor of 1000 s/mm2 is achieved at R = 2.1 and partial Fourier encoding of 60%. In vivo tensor maps of volunteers and a patient, with an in-plane resolution of 0.78 x 0.78 mm2, are also presented to demonstrate the practical implementation of the parallel approach.
URI:	https://digitalcollection.zhaw.ch/handle/11475/5028
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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Järmann, T., Pruessmann, K., Valavanis, A., Kollias, S., & Boesiger, P. (2006). Influence of SENSE on image properties in high-resolution single-shot echo-planar DTI. Magnetic Resonance in Medicine, 55(2), 335–342. https://doi.org/10.1002/mrm.20769

Järmann, T. et al. (2006) ‘Influence of SENSE on image properties in high-resolution single-shot echo-planar DTI’, Magnetic Resonance in Medicine, 55(2), pp. 335–342. Available at: https://doi.org/10.1002/mrm.20769.

T. Järmann, K. Pruessmann, A. Valavanis, S. Kollias, and P. Boesiger, “Influence of SENSE on image properties in high-resolution single-shot echo-planar DTI,” Magnetic Resonance in Medicine, vol. 55, no. 2, pp. 335–342, 2006, doi: 10.1002/mrm.20769.

JÄRMANN, Thomas, Klaas PRUESSMANN, A. VALAVANIS, S. KOLLIAS und Peter BOESIGER, 2006. Influence of SENSE on image properties in high-resolution single-shot echo-planar DTI. Magnetic Resonance in Medicine. 2006. Bd. 55, Nr. 2, S. 335–342. DOI 10.1002/mrm.20769

Järmann, Thomas, Klaas Pruessmann, A. Valavanis, S. Kollias, and Peter Boesiger. 2006. “Influence of SENSE on Image Properties in High-Resolution Single-Shot Echo-Planar DTI.” Magnetic Resonance in Medicine 55 (2): 335–42. https://doi.org/10.1002/mrm.20769.

Järmann, Thomas, et al. “Influence of SENSE on Image Properties in High-Resolution Single-Shot Echo-Planar DTI.” Magnetic Resonance in Medicine, vol. 55, no. 2, 2006, pp. 335–42, https://doi.org/10.1002/mrm.20769.