Isotropic resolution diffusion tensor imaging of lumbosacral and sciatic nerves using a phase-corrected diffusion-prepared 3D turbo spin echo

被引:15
|
作者
Cervantes, Barbara [1 ]
Van, Anh T. [2 ]
Weidlich, Dominik [1 ]
Kooijman, Hendrick [3 ]
Hock, Andreas [3 ]
Rummeny, Ernst J. [1 ]
Gersing, Alexandra [1 ]
Kirschke, Jan S. [4 ]
Karampinos, Dimitrios C. [1 ]
机构
[1] Tech Univ Munich, Dept Diagnost & Intervent Radiol, Klinikum Rechts Isar, Ismaninger Str 22, D-81675 Munich, Germany
[2] Tech Univ Munich, Inst Med Engn IMETUM, Garching, Germany
[3] Philips Healthcare, Hamburg, Germany
[4] Tech Univ Munich, Dept Diagnost & Intervent Neuroradiol, Klinikum Rechts Isar, Munich, Germany
基金
欧洲研究理事会;
关键词
magnetic resonance neurography; peripheral nerves MRI; diffusion prepared turbo spin echo; motion-induced phase errors; body diffusion; lumbar plexus; MAGNETIC-RESONANCE NEUROGRAPHY; MR NEUROGRAPHY; PERIPHERAL-NERVES; PROPELLER MRI; FLIP ANGLES; PLEXUS; T-2; POLYNEUROPATHY; FEASIBILITY; MOTION;
D O I
10.1002/mrm.27072
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
PurposeTo perform in vivo isotropic-resolution diffusion tensor imaging (DTI) of lumbosacral and sciatic nerves with a phase-navigated diffusion-prepared (DP) 3D turbo spin echo (TSE) acquisition and modified reconstruction incorporating intershot phase-error correction and to investigate the improvement on image quality and diffusion quantification with the proposed phase correction. MethodsPhase-navigated DP 3D TSE included magnitude stabilizers to minimize motion and eddy-current effects on the signal magnitude. Phase navigation of motion-induced phase errors was introduced before readout in 3D TSE. DTI of lower back nerves was performed in vivo using 3D TSE and single-shot echo planar imaging (ss-EPI) in 13 subjects. Diffusion data were phase-corrected per k(z) plane with respect to T-2-weighted data. The effects of motion-induced phase errors on DTI quantification was assessed for 3D TSE and compared with ss-EPI. ResultsNon-phase-corrected 3D TSE resulted in artifacts in diffusion-weighted images and overestimated DTI parameters in the sciatic nerve (mean diffusivity [MD]=2.060.45). Phase correction of 3D TSE DTI data resulted in reductions in all DTI parameters (MD=1.73 +/- 0.26) of statistical significance (P0.001) and in closer agreement with ss-EPI DTI parameters (MD=1.62 +/- 0.21). ConclusionDP 3D TSE with phase correction allows distortion-free isotropic diffusion imaging of lower back nerves with robustness to motion-induced artifacts and DTI quantification errors. Magn Reson Med 80:609-618, 2018. (c) 2018 The Authors Magnetic Resonance in Medicine published by Wiley Periodicals, Inc. on behalf of International Society for Magnetic Resonance in Medicine. This is an open access article under the terms of the Creative Commons Attribution NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
引用
收藏
页码:609 / 618
页数:10
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