Projection of a NIRS channel on a brain surface

35 sec read

When analyzing the data in our concurrent NIRS-fMRI study, we are particularly interested in how the NIRS signals were correlated to the fMRI signal. To answer the question we need to create an ROI (region of interest) in brain which is directly underneath the NIRS channel (which is on the skull). So a projection of the NIRS channel on the brain surface is necessary.

It might be easy if the brain were a perfect sphere, or at least doable if it is smooth. But brain surface is anything but smooth. What we did is:

  1. Create a brain surface mask. This is easy using BET (http://fsl.fmrib.ox.ac.uk/fsl/fslwiki/BET)
  2. Loop over all voxels on the surface, calculate the distance between the NIRS channel (point A) and the voxel
  3. Find the voxel which is closest to the NIRS channel (It is point B in the figure below)
Projection of NIRS channel on brain surface
Projection of NIRS channel on brain surface



写作助手,把中式英语变成专业英文


Want to receive new post notification? 有新文章通知我

第五十三期fNIRS Journal Club通知2024/06/22, 10am 李洪

个体在处理不同记忆负荷信息时会表现出一定的行为差异。作为一项新兴指标,瞬时脑信号变异性能够揭示个体内部因任务需求不断变化而进行的神经资源分配,从而为了解大脑如何适应和处理不同复杂程度的信息提供了新的见
Wanling Zhu
8 sec read

第五十二期fNIRS Journal Club视频 周欣博士

Youtube: https://youtu.be/U7gz3NwWcDk优酷:https://v.youku.com/v_show/id_XNjQwMTc0OTYwOA==.html 自闭症特质(A
Wanling Zhu
12 sec read

第五十二期fNIRS Journal Club通知2024/06/01, 10am 周欣博士

自闭症特质(Autistic traits)影响人与人之间的社交互动,但该影响背后的神经机制仍然有待研究。来自香港中文大学的周欣博士将分享团队利用近红外超扫描技术研究不同互动场景下脑同步与自闭特质之间
Wanling Zhu
8 sec read

Leave a Reply

Your email address will not be published. Required fields are marked *