WEKO3
アイテム
How Is the Fractional Anisotropy Affected by Frequency-Dependent Changes to the Eigenvalues of the Apparent Diffusion Tensor Measured with Oscillating-Gradient Spin-Echo Diffusion Tensor Imaging?
https://repo.qst.go.jp/records/54476
https://repo.qst.go.jp/records/54476ee64cc5e-a82b-4139-a876-89756db49230
| Item type | 会議発表論文 / Conference Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2014-02-13 | |||||
| タイトル | ||||||
| タイトル | How Is the Fractional Anisotropy Affected by Frequency-Dependent Changes to the Eigenvalues of the Apparent Diffusion Tensor Measured with Oscillating-Gradient Spin-Echo Diffusion Tensor Imaging? | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_5794 | |||||
| 資源タイプ | conference paper | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Kershaw, Jeffrey
× Kershaw, Jeffrey× Leuze, Christoph× Aoki, Ichio× Obata, Takayuki× Kanno, Iwao× Ito, Hiroshi× Yuki, Yamaguchi× Hiroshi, Handa× Ｋｅｒｓｈａｗ Ｊｅｆｆｒｅｙ× ロイツェ クリストフ× 青木 伊知男× 小畠 隆行× 菅野 巖× 伊藤 浩 |
|||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | As the oscillating gradient spin-echo (OGSE) sequence has shown promise as a means to probe tissue microstructure (eg. [1,2]), it has been applied in recent work to diffusion-tensor imaging (DTI) of ex vivo monkey brain [3], ex vivo mouse brain [4], and in vivo rat brain [4,5]. In the latter study the apparent diffusion tensor (ADT) was estimated for motion-probing gradient (MPG) frequencies in the range 33.3–133.3 Hz, and regions-of-interest (ROIs) in the corpus callosum (CC), visual cortex (VC), cerebellar white matter (CBWM) and cerebellar grey matter (CBGM) were selected for detailed analysis. While there was no evidence that the orientation of the principal eigenvector varied systematically with MPG frequency, there were substantial, approximately linear changes to other aspects of the ADT. In particular, linear fits to the eigenvalues (EVs) with frequency found that the slope (_x1050585__x1051612_) was positive and significantly different from zero for all EVs of the CBWM, CBGM and VC, but only the principal EV increased strongly for the CC (Fig 1, boxes represent the standard deviation, bars are 95% confidence intervals). At the same time, linear fits to the fractional anisotropy (FA) found a substantial decrease for the CBWM, and no or only a minor dependence on frequency for the CBGM, CC and VC (Fig 2). However, although the FA is a well known function of the EVs, it is not immediately clear how the behaviour of the EVs relates to the trends in the FA. The goal of this work was to investigate how the FA is affected by changes to the EVs. | |||||
| 書誌情報 |
Proc. Intl. Soc. Mag. Reson. Med. 巻 21, p. 3198-3198, 発行日 2013-04 |
|||||
