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Diffusion-weighted fMRI signal in rat somatosensory cortex at 7T
https://repo.qst.go.jp/records/69465
https://repo.qst.go.jp/records/69465f9b4c987-d784-4b0b-925a-fccb2209c168
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2008-09-24 | |||||
| タイトル | ||||||
| タイトル | Diffusion-weighted fMRI signal in rat somatosensory cortex at 7T | |||||
| 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_c94f | |||||
| 資源タイプ | conference object | |||||
| 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× Obata, Takayuki× Joonas, Autio× Shibata, Sayaka× Kuroiwa, Daigo× Kanno, Iwao× Aoki, Ichio× Ｋｅｒｓｈａｗ Ｊｅｆｆｒｅｙ× 小畠 隆行× ヨーナス オーティオ× 柴田 さやか× 黒岩 大悟× 菅野 巖× 青木 伊知男 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Diffusion-weighted fMRI has attracted some as a technique that might provide information more directly correlated with actual neural activity than BOLD fMRI.A number of interpretations have been proposed for the diffusion-weighted signal,however many questions remain unanswered.To further examine the dependence of fMRI on b-value,somatosensory forepaw stimulation was conducted on alpha-chloralose anesthetised rats at 7 T.Functional images were acquired at five b-values(b=0,200.800.1400and2000s/mm2)and two echo-times(TE=30and60ms). The mean signal changes from all rats showed a clear difference in signal amplitude between data acquired at differentTEs, although the response shape is qualitatively similar.In contrast to previous human data,the positive stimulus-correlated signal change and post-stimulus undershoot showed a slight downward (but insignificant) trend with increased b-value.Note that the undershoot persists for higher b-values. The IV contribution to the TE=60 ms data may be substantially attenuated because of the relatively short T2 of blood at7T. |
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| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 第36回日本磁気共鳴医学会 | |||||
| 発表年月日 | ||||||
| 日付 | 2008-09-11 | |||||
| 日付タイプ | Issued | |||||
