Resting-state fMRI topics

望严老师帮忙分析下原因:
1、试用新版DPARSFA预处理数据时，发现以下报错，另外想把剔除协变量放在滤波前，输入FunImgARWS图像，同样出现类似的报错。
Generating voxel specific head motion for G:\analysis\RealignParameter\sub_001_NC\rp_a20111119_085529ep2dpacedyntmocosunyu3T-018-20s003a001_011.txt...???

Error using ==> class
Cannot change the number of fields of class 'file_array' without first typing 'clear classes'.

Hi,

I have been testing some of the features on DPARSFA V2.2PRE. When running on data from either 1 or 2 subjects using the options from "Calculate in MNI Space: TRADITIONAL Order", everything processes smoothly with parallel workers set at 0. However, when I set the parallel workers to 6 (on an 8 core machine), I get the following error:

论坛老师好！

有几个问题想看看大家的意见。

1、AlphaSim与Gaussian random-field theory校正那个更严格，分别都更适用于那些情况呢？通常我发现GRF校正voxel P值设为z>2.3，这个值相当于p值多少呢，可否再设的松一点？REST新版加入了GRF校正，可否就该校正的参数设置及意义做一讲解呢？

2、前面严老师说REST中的REST smoothest可以估计校正要求的平滑值，对此有些不解：统计学检验图估计smooth值有什么意义？

3、我发现REST slice viewer与xjview好像有点差异，REST中输入voxel水平的p值0.01，对应T值2.70，而xjview中输入0.01对应T值2.32，不知什么原因？

4、新版DPARSFA中，将协变量剔除提前到filter前有什么意义？

麻烦了！

Dear REST expert,
I have a question about the statistic method for the FC analysis. We have a single case vs a group of controls(N = 12).
We don't know which test is suitable for the comparison between this single case and a group of controls.

Best regards
Fede

Dear all,

A brief introduction of DPARSF V2.2 Advanced Edition has been updated to http://restfmri.net/forum/course

Please see the updated "Part III" Release 120923.

Thanks,

Chao-Gan

Dear Chao-Gan et al.,

Greetings.
I am running voxelwise bivariate GCA from the GUI. Unfortunately only the x to y maps are getting z transformed, not the y to x maps. Can you suggest a solution? I have a load of y to x maps that I want to normalise using the mean within the mask.

Thank you
Lena

最近对小世界网络很感兴趣,有一些问题想请教严老师.
1 有些文献提到,在比较病人组和正常对照组的全局小世界网络参数,比如local efficiency时候,说采用了FGR校正.我有些奇怪,每个被试只有一个local efficiency值,为什么还要校正?是不是可能是cost取值比较多,比如说cost 0.1~0.4,步长0.01的话,总共有30个值, 把这30个值同时考虑校正,比如说最严格的取p=0.05/30?

2 在比较两组数据之间的脑区的参数时,比如说nodal degree,需要确定一个cost具体值.很多时候文献中会选取全局参数(比如local efficiency)差异最大的cost值(p最小),还有别的方法吗?我的结果对应全局参数差异最大的cost值,cost取了0.35左右,感觉很不合适.

万分感谢严老师!

Hello,
I got the following error when trying to load the overlay a T map generated with the 2 sample T test function.
Do you have any suggestions on how to fix it? I am using Matlab 2011b with the Image Processing and Statistics toolboxes.
Thank you.

Undefined function 'imresize' for input arguments of type 'double'.

Error in rest_sliceviewer>AddOverlay (line 2924)

严老师您好，做功能连接时在球形坐标区选择规定的ROI时，怎么才能知道我想选的感兴趣区的具体坐标是多少呢？很多情况下是去查阅文献，有没有一个表能总结一下的，到时候就一目了然了，谢谢您！

Dear REST team
There seems to be some problem in calling the mPF_list variable for degree centrality
I am using a recursively called directory with 20 subjects, each subject folder containing 235 volumes
Pls see the message below:

Starting matlabpool using the 'local' configuration ... There is no data or non-data files in this directory: