欢迎到静息态功能磁共振成像论坛
Welcome to the forum of resting-state fMRI

Reorienting matrices for online data

 Given the amount of time and effort for interactive reorienting, here we release the reorient matrices for online data of Autism Brain Imaging Data Exchange (ABIDE) (Di Martino et al., 2013) (fcon_1000.projects.nitrc.org/indi/abide/).

Data Processing Assistant for Resting-State fMRI (DPARSF) V2.3

Updates and user support of DPARSF is now at http://rfmri.org/DPARSF

关于提取z值

老师您好,我看了很多文献里都有做完功能连接以后提取Z值然后和量表等资料做相关,但是我不清楚这个z值是怎么提取的呢?我看的文献里都没有写这个具体过程。可以用rest 软件提取吗?

想请问问为什么 LFF 是从0.01~0.08 Hz

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!

modulation in VBM (in DPARSFA)

 各位老师, 有个VBM的问题, 

在做VBM的modulation时候我们经常这样选择:
单击Modulated normalized选择“affine+non-linear only”。这里的affine+non-linear only是什么意义,是说T1像经过affine和non-linear两次normalization,然后得到一幅MNI的图像?
在DPARSFA的VBM里面是如何选择normalization和modulation过程的。

谢谢!

functional connectivity maps

 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?

Why linear trend should be removed before filtering?

Dear all,

Here is a conversation long time ago on the necessity of removing linear trend before filtering, if we think linear trend is a kind of noise. Hope this information is helpful for some of us!

scanner drift and temporal filtering

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?

 
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

求大鼠脑功能模板和全脑MASK

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!

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