用dpabi v2.3做静息态功能连接的几个问题

Submitted by bszzf2018 on Tue, 06/20/2017 - 06:11

严老师好：

我最近在用dpabi 2.3版做静息态功能连接，预处理选择realign, T1 DICOM to NIFTI, T1 Coreg to Fun, Segment, Normalise, Smooth, Detrend, Nuisance Covariates Regression (Friston 24, WM, CSF, Global), Filter, Scrubbing（按默认参数）, FC。我的疑问如下：

1. 这些处理步骤对于功能连接来说是否有缺失或多余？

2. 因为我目前只是想做功能连接，所以想问下scrubbing是否有必要做？

3. 如果要做scrubbing，是在Nuisance Covariates Regression这步选择Head motion scrubbing regressors（按默认参数），还是像我现在的处理一样，选择Filter之后的“Scrubbing”？

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Extracting ROI Signals

Submitted by heretic133 on Sat, 06/17/2017 - 05:17
Hi everybody,
 
I have a problem with extracting ROI signals that is driving me crazy, I hope I can find the answer here.
 

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Analysis With GM Volume as Covariates

Submitted by jjtormur on Fri, 05/26/2017 - 16:03

Dear experts,

I am trying to perform an ALFF analysis with dpabi. I want to introduce the GM volume as a covariate in the two-sample t-test.

I think that I have to introduce this covariate in "covariate images" option in the statistical analysis, but What kind of images should I use?

I have the segmented and dartel images for all subjects, but I don't know if these images are the correct ones.

Best,

Juan

 

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black region in the bottom of image for ReHo

Submitted by kato7kato7 on Thu, 05/25/2017 - 05:56

Dear experts 

I preprocessed dicom files from FunRaw to smoothed ReHo image by DPARSF. The whole process was error-free, but the bottom regions of the szReHo image including cerebellum and pons were shown  as  black. I think there was a problem with preprocessing, but I do not know exactly what the problem is. I attached files created during preprocessing. I would like to ask you for your expert advice. Thank you

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Question about ALFF analysis

Submitted by jjtormur on Wed, 05/24/2017 - 14:15

Dear all,

I am trying to do some of ALFF and fALFF analysis in resting -state, but I don't know if I am proceeding well. I just want to compare the activity in resting-state beteween two groups. Similar to this paper from Wang, Human Brain Mapping 32:1720–1740 (2011).

I did all the pre-processing in SPM and now I want to use this images for ALFF. 

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Annual Event of Chinese Young Scholars for Human Brain Mapping

Submitted by YAN Chao-Gan on Mon, 05/22/2017 - 10:00

Invitation to the Annual Event of Chinese Young Scholars for Human Brain Mapping, Vancouver, Canada, 27 June 2017

Submitted by YAN Chao-Gan on Mon, 05/22/2017 - 09:58

Invitation to the Annual Event of Chinese Young Scholars for Human Brain Mapping, Vancouver, Canada, 27 June 2017.

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dpabi使用VBM出错

Submitted by mayhappy on Sun, 05/21/2017 - 12:05
请各位老师帮忙看看，我用的metlab2014B，spm8，dpabi2.3，在运算VBM时出现如下提示：
 
警告: STR2FUNC "C:\Program
Files\MATLAB\R2014b\toolbox\dpabi_v2.3_170105\dparsf\Jobmats\Template_VBM_NewSegmentDARTEL.mat"
的输入不是有效的函数名称。在未来的版本中，这将生成错误。 
> In DPARSFA at 24
  In dpabi>pushbutton_VBM_Callback at 199
  In gui_mainfcn at 95
  In dpabi at 42
  In @(hObject,eventdata)dpabi('pushbutton_VBM_Callback',hObject,eventdata,guidata(hObject)) 
 
谢谢！！

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dpabi运行VBM出错

Submitted by mayhappy on Sun, 05/21/2017 - 12:00

Error Using Normalization

Submitted by RaviBot on Sat, 05/13/2017 - 15:46

Hello, 

I am importing thresholded weighted, undirected matricies (symmetric) into GraphVar from an outside progam. These networks/matricies are all not fragmented (checked using the CheckFrag button). I am randomizing using the random_und_connected function however when I try to calculate cetain graph metrics such as betweenness centralitity, I get an error saying "Normalization error: some metrics derived from random networks result in zero which can not be used for normalization." 

Could someone please advise on what could be the issue? Thanks in advance!

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