Motion artifact reduction in pediatric diffusion tensor imaging using fast prospective correction.
Motion artifact reduction in pediatric diffusion tensor imaging using fast prospective correction.
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DOI：
10.1002/jmri.24678
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发表时间：
2015-05
影响因子：
4.4
通讯作者：
Meintjes, Ernesta M.
中科院分区：
文献类型：
--
作者：
Alhamud, A.;Taylor, Paul A.;Laughton, Barbara;van der Kouwe, Andre J. W.;Meintjes, Ernesta M.
关键词：
To evaluate the patterns of head motion in scans of young children and to examine the influence of corrective techniques, both qualitatively and quantitatively. We investigate changes that both retrospective (with and without diffusion table reorientation) and prospective (implemented with a short navigator sequence) motion correction induce in the resulting diffusion tensor measures. Eighteen pediatric subjects (aged 5–6 years) were scanned using 1) a twice-refocused, 2D diffusion pulse sequence, 2) a prospectively motion-corrected, navigated diffusion sequence with reacquisition of a maximum of five corrupted diffusion volumes, and 3) a T1-weighted structural image. Mean fractional anisotropy (FA) values in white and gray matter regions, as well as tractography in the brainstem and projection fibers, were evaluated to assess differences arising from retrospective (via FLIRT in FSL) and prospective motion correction. In addition to human scans, a stationary phantom was also used for further evaluation. In several white and gray matter regions retrospective correction led to significantly (P < 0.05) reduced FA means and altered distributions compared to the navigated sequence. Spurious tractographic changes in the retrospectively corrected data were also observed in subject data, as well as in phantom and simulated data. Due to the heterogeneity of brain structures and the comparatively low resolution (~2 mm) of diffusion data using 2D single shot sequencing, retrospective motion correction is susceptible to distortion from partial voluming. These changes often negatively bias diffusion tensor imaging parameters. Prospective motion correction was shown to produce smaller changes.
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影响因子：
10.6
作者：
Pavuluri, Mani N.;Yang, Shuohui;Kamineni, Kiran;Passarotti, Alessandra M.;Srinivasan, Girish;Harral, Erin M.;Sweeney, John A.;Zhou, Xiaohong Joe
通讯作者：
Zhou, Xiaohong Joe
DOI：
10.1523/jneurosci.4184-11.2011
发表时间：
2011-11-16
期刊：
The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子：
--
作者：
Hasan KM;Walimuni IS;Abid H;Frye RE;Ewing-Cobbs L;Wolinsky JS;Narayana PA
通讯作者：
Narayana PA
影响因子：
5.7
作者：
Qiu, Deqiang;Tan, Li-Hai;Khong, Pek-Lan
通讯作者：
Khong, Pek-Lan
影响因子：
19.7
作者：
Engelbrecht, V;Scherer, A;Mödder, U
通讯作者：
Mödder, U
影响因子：
3.3
作者：
Chang, LC;Jones, DK;Pierpaoli, C
通讯作者：
Pierpaoli, C