Discuss

老师，
请问问为什么 resting-state fMRI 是从 0.01~0.08Hz 呢。。。？ 与呼吸和心跳等频率是否直接相关？

先谢谢！

 各位老师, 有个VBM的问题, 

 Dear all,

I am new to DPARSF and I have a question concerning the z transformed functional connectivity maps. I am a bit surprised at the results because the z values of my maps are pretty low (most are between -0.6 and 1). I did not globally regress my images and I expect at least a few voxels to have values of 3 or 4. Anyone has any ideas as to why that is happening?

老师，请问下：低频的 scanner drift 可以在滤波的时候被抑制，为什么之前还需要对它进行 nuisance covariate regression 呢？ 是否回归这一步是为了减弱它对其它频率的影响。。。？

谢谢！

 
想问一下头顶那些白色得是什么引起得？数据是不是不能用了

老师您好：
       初次做动物的脑功能分析。不知道您是否有大鼠的标准化模板？或者哪位大侠有模板的？应该就是中科院高能物理研究所那种。能否提供给学生使用一下？谢谢！
还有，做rest分析时的mask应该用哪一种？这个我也没有。特向老师求教。谢谢！

 Hello, 

I am using REST Functional Connectivity tool to generate the zFC maps and am having this problem:

ESMRMB Lectures on MR: Educational on Resting State fMRI
Vienna – September 2-4, 2013

Dear REST experts:

I noticed that there are several new functions of REST v1.8 when compared to previous version, such as VMHC, degree centrality and GCA.

Can anybody tell me the citations or references for these new functions?

Thank you.

Dr. Lai

尊敬的各位老师：
      我想问ica提取出来z值应该怎么解释呢？我做的是case-control用双样本t检验后选取其中的roi，再提取z值，这个指的是roi在这个大脑网络的连接强度？还是指？