global signal regression？

Submitted by situyuhen on Thu, 12/28/2017 - 01:41

严老师您好：

        1. seed-based的两组静息态功能连接，主要想看跟灰质连接情况，两独立样本t检验的maskfile可以使用预处理中mask文件夹里的all resempled grey mask图像吗（灰质的）？

       2.不去掉全脑信号的时候，两组差异不显著；去掉全脑信号，两组差异比较显著。这种情况是不是可以就用去掉全脑信号数据来统计分析？

       

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RESTplus alpha-sim问题请教

Submitted by WangJiashu on Mon, 12/25/2017 - 03:33
尊敬的各位老师：
 
        您好！我使用RESTplus附带的alpha-sim进行fMRI second-level分析校正时遇到一点问题，想向大家请教：
 
        1. alpha-sim中，估计FWHM的过程中，需要输入的mask是什么，是和最终分析使用的mask一样的吗？我在进行second-level分析时，alpha-sim本身使用的即是spm自己在second-level生成的mask.nii，而在估计FWHM时没有输入mask，不知道这样是否可以；此外我发现在对同样的first-level contrast建立的不同second-level分析中（如只考虑跨被试的主效应vs同时考虑一个或几个被试间的调节变量），spm自己报告的FWHM是几乎一样的，而使用REST alpha-sim计算出的却有不一样，不知道这是不是和我在FWHM的估计中没有放入mask有关？
 

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Automask Problem

Submitted by Repunzal on Sun, 12/24/2017 - 14:13

Dear Dr. Yan,

I've encounted a prolem with automask generation. I know that I can skip Automask. But I am still very curious about its causes.

(1) My generated automask is like the attachment file 2 named 'automaskAfterFillCompletely.png (6.12 KB)'. For most slices, no-brain area was also included.

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DPARSF error

Submitted by amrithah on Sat, 12/23/2017 - 04:43

Hello,

 

I am getting the following error after trying to run nuisance regression on DPARSF A:

 

Error using matlab.ui.Figure/set

Invalid or deleted object.

 

Error in matlab.hg.internal.openfigLegacy (line 117)

                set(fig,'Visible',savedvisible);

 

Error in gui_mainfcn>local_openfig (line 286)

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What should pay attention to make mask in DPASF?

Submitted by scmaping on Fri, 12/22/2017 - 16:34

I willing to do resting state functional connectivity ，need to know  3 ROI（MNI），but I found actices  almost did not  say them.So I want to make 3 mask as the ROIs  in DPARSF，but not sure what should pay attention to.（just do it or other？The mask are made by WFU_PickAtlas ）.THANK YOU!

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新版dpabi的Alphasim有关问题

Submitted by situyuhen on Fri, 12/22/2017 - 04:34

严老师您好：

    1. 新版dpabi里的alphasim有对话框提示，是不能用了吗？可是统计完的结果，用别的多重比较校正没有结果，用这个alphasim还有一些结果，这样怎么办？（在VIEW里overlay configure 里的p值填的0.01）

    2.想用spss做相关性分析，根据结果出现的某一减弱区存为mask，利用roi extract 提取一组（因为做的功能连接，是用这一组z-FCmap的图吗？）的这个区域的值，最后这组值是不是在ROIsignal.txt这个文件里？

 

   

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老师好，请教下关于DPABI 做统计分析的问题。谢谢

Submitted by lblfmri on Thu, 12/21/2017 - 02:03
严老师您好，在使用DPABI过程中遇到些问题，请教下您。
我做的是三种疾病（精神分裂症、抑郁症、双相情感障碍）与健康人群脑白质FA差异分析，目的在于找到三种疾病共同异常的maker和每种疾病特有的marker。

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Error

Submitted by nibhroim on Wed, 12/20/2017 - 12:07

Hi,

This is the error that I'm getting when processing the PreprocessingDemoData from the rfmri site. Can you help me with this?

Computing VMHC...
Reading images from "/media/ciara/Seagate/ProcessingDemoData/FunImgARglobalCWFsymS/Sub_002" etc.
Error using y_Read (line 54)
File doesn't exist: /media/ciara/Seagate/ProcessingDemoData/FunImgARglobalCWFsymS/Sub_002.nii.gz

Error in y_ReadRPI (line 41)
[Data,Header] = y_Read(FileName,VolumeIndex);

Error in y_ReadAll (line 68)
[Data, VoxelSize, Header] = y_ReadRPI(FileList{1});

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2d-ReHo and age appropriate atlases

Submitted by veeus18 on Sat, 12/16/2017 - 18:30

Hello, Dr. Yan, are there any plans to incorporate 2d-ReHo computation in DPARSFA?

Would it be possible to include age-appropriate standard templates in DPARSFA (instead of the standard MNI template)? 

Like this one-

https://www.nitrc.org/frs/?group_id=1189

thank you

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Please help me with the DPARSFA use!

Submitted by rbishnoi on Sat, 12/16/2017 - 18:29

I am getting this error, need help!

 

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