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Minimization of Post-Stimulus Undershoot in Heavily Diffusion-Weighted Functional Magnetic Resonance Imaging
https://repo.qst.go.jp/records/53817
https://repo.qst.go.jp/records/5381726c5d184-911e-4ed0-a255-c599c6607190
| Item type | 会議発表論文 / Conference Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2007-03-13 | |||||
| タイトル | ||||||
| タイトル | Minimization of Post-Stimulus Undershoot in Heavily Diffusion-Weighted Functional Magnetic Resonance 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 |
Obata, Takayuki
× Obata, Takayuki× Tomiyasu, Moyoko× Kashikura, Kenichi× Hirano, Yoshiyuki× Nonaka, Hiroi× Ikehira, Hiroo× et.al× 小畠 隆行× 富安 もよこ× 柏倉 健一× 平野 好幸× 野中 博意× 池平 博夫 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Darquie et al. reported a new fMRI method using apparent diffusion coefficient (ADC) showing a different transient feature from other fMRI methods at visual cortex activation, which had a slow return to baseline after stimulation [1]. They suggested that the ADC change may reflect cortical cell swelling due to neuron activation. However, further study to confirm this hypothesis has not been performed. The timing of the slow return to baseline in the ADC time course is mostly consistent with undershoot in the blood-oxygen-level-dependent (BOLD) response, suggesting a relationship between the slow return in ADC and undershoot in BOLD transients. Therefore, we analyzed post-stimulus undershoot in heavily diffusion-weighted MRI (DWI) (b=1400 s/mm2), and compared it with those in weakly DWI (b=200 s/mm2) and BOLD image. The 1400 s/mm2 and 200 s/mm2 values of b-factor are the same as those used for calculation of ADC in the above report [1]. |
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| 書誌情報 |
Proceedings of the International Society for Magnetic Resonance in Medicine, Scientific Meeting and Exhibition 巻 14, p. 2785, 発行日 2006-05 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 1524-6965 | |||||
