@misc{oai:repo.qst.go.jp:00069744, author = {Kuroiwa, Daigo and Kawaguchi, Hiroshi and Kershaw, Jeffrey and Tachibana, Atsumichi and Joonas, Autio and Hirano, Masaya and Aoki, Ichio and Kanno, Iwao and Obata, Takayuki and 黒岩 大悟 and 川口 拓之 and Kershaw Jeffrey and 橘 篤導 and ヨーナス オーティオ and 青木 伊知男 and 菅野 巖 and 小畠 隆行}, month = {Apr}, note = {The contribution of the BOLD effect in heavily diffusion weighted fMRI is still unclear. In this study, a multiple spin-echo echo-planar-imaging sequence after motion probing gradients was used to measure the transverse relaxation rate at different b-values. The results suggest that the contribution of BOLD to DW fMRI signal changes is independent of b-value. It is speculated that the main contribution to heavily diffusion-weighted functional MRI signal is not the BOLD effect., 17th Scientific Meeting & Exhibition}, title = {Signal Source in Heavily Diffusion-Weighted functional MRI}, year = {2009} }