January 2011

双样本t检验异常信号

Submitted by xying5158 on Mon, 01/17/2011 - 16:08

您好，我用dparsf得到alff结果进行两样本t检验时发现还有脑室内的信号增强还有很多undefined的脑区（自己做的mask和brainmask均有），这时候应该怎么处理？
另外，利用两组数据单样本t检验结果做mask的表达式是不是(i1>0)+(i2>0)>0，用~表示不等于 image calculator出错，求准确表达式
不胜感激！

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Fwd: What's new for '+"resting" +"fMRI"' in PubMed

Submitted by admin on Sun, 01/16/2011 - 20:30

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Resting-state fMRI topics

如何计算每个cluster里的ReHo平均值

Submitted by bgao on Sun, 01/16/2011 - 15:28

老师们，你们好！
非常感谢你们对我以前问题的回答！现在我又遇到了问题，特来求教。问题如下：
问题一：我想先确认一下几个问题：
1，我们用restsliceviewer 看图像时，把十字架点位到一个点后，这一点的ReHo值是不是montage左边的值?如value:Underlay/overlay=43/14.325 这一点的ReHo值是不是14.325？
2，我们用rest做单样本T检验时，用的smReHo数据，这个是每个image没减去1的，把Base设为1，是不是等同用每个smReHo的image都减去1数据，把Base设为0？（我看过视频了，就是想来确认一下，谢谢）

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Resting-state fMRI topics

problems with alphasim

Submitted by efine on Thu, 01/13/2011 - 05:45

Hi, I am trying to run alphasim and keep getting the following error message: I've tried various masks. The error below was after I applyed the brain mask dparsfa created. Any help is much appreciated.

REST Version: 1.5, Release: 20101101
??? Undefined function or method 'normrnd' for input arguments of type 'double'.

Error in ==> rest_AlphaSim at 61
fim=normrnd(0,1,nx,ny,nz);

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Resting-state fMRI topics

problems with slice viewer

Submitted by efine on Thu, 01/13/2011 - 05:43

Hi,

I am just trying to overlay a subject's zmap that I created in dparsfa that reflects the correlations among various ROIs over a structural image using slice viewe but get the following error message:

Warning: image_toolbox not valid
> In rest_sliceviewer>InitControls at 917
In rest_sliceviewer at 68
In rest_sliceviewer at 32

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Resting-state fMRI topics

请教：如何将分析后的功能图像转换回标化前的形态呢

Submitted by flysnail on Sat, 01/08/2011 - 22:07

请教各位老师：想将dparsf分析后得到的FC mapping 转换回标化前的形态，这样就可以将激活区overlay到未标化的T1WI图像上，该如何实现呢？需要注意些什么呢?

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Resting-state fMRI topics