用DPABI做动态功能连接中遇到的一个问题

最近用使用严老师的DPABI中的TDA模块做了动态功能连接,在查阅了文献后发现很多文献在fisher-z变换后将z值划分为(<-0.5)(-0.5~-0.25)(-0.25~0.25)(0.25-0.5)(>0.5)这5段以验证sliding window对组水平差异的影响。请问在DBAPI的工具中能实现吗?

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Normalize by using T1 templates

Hello all,

I am using DPARSF to preprocess some rsfMRI data for use in a machine learning algorithm. I am worried about the use of DARTEL because of overfitting resulting from the creation of a template based on all subjects. I was thinking of using DARTEL but with a template derived from an independent sample of 555 healthy control subjects of the IXI-database. I already have this template. To use, I believe I would need the hidden option mentioned in the videos "Normalize by using T1 templates". How could I go about using this option?

 

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Turning of zipping to nii.gz and unpacking with gunzip

Hi,

since gunzip with Matlab is ultra slow I would like to turn of zipping the files when using the T1 DICOM to Nifti and EPI DICOM to Nifti option. How is this possible?

Thank you in advance

 

David

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Error in generating group mask

Hello, 

I have a question regarding to generating a group mask under quality contral. I wanted to generate a group mask for later use in paired t-test analysis, and this step is very important in this analysis. 

I watched the online courses to find out how the working directory is set up and tried the same way that was in the vedio:

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为什么灰质密度用作协变量分析时用“wc1”文件,而做VBM分析时用“smwc1”文件?

老师好!

请问为什么灰质密度用作协变量分析时用“wc1”文件,而做VBM分析时用“smwc1”文件?

谢谢!

Zhe

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第一步一个是做"T1 Coreg to Fun",一个是做"Reorient T1*",第二步在“New Segment+DARTEL”生成的灰质、白质、脑脊液数据文件是相同的吗?

严老师,您好!

我在数据预处理中"Nuisance Covariates Regression"去除脑脊液、白质,所以通过"T1 Coreg to Fun"和“New Segment+DARTEL”这一步生成了灰质、白质、脑脊液的文件数据。

后面在做VBM中,通过dpabi默认的步骤"Reorient T1*"和“New Segment+DARTEL”也同样生成了,灰质、白质、脑脊液的数据文件。

请问这里第一步一个是做"T1 Coreg to Fun",一个是做"Reorient T1*",那在“New Segment+DARTEL”生成的灰质、白质、脑脊液数据文件是相同的吗?

谢谢!

Zhe

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预处理fMRI图像报错

严老师您好:

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preprocessing-pixelized image

 

 Dear Chaogan,

  I have a problem during doing data preprocessing using dpabi. The data is okay at the files under FunImgR (the first image below). However, it became pixelized starting from FunImgRC (the second image).  Any idea of what could have gong wrong? Thanks. 

 

用dparsfa做功能连接时报错

严老师,您好!

在使用dparsfa时,每次都出现以下报错是什么原因呀?

谢谢您的回答!祝身体健康!

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an error occured when using dparsfa

hello!

professor Yan, when i processed my data with dparsfa based on matlab2013a, spm12, an error always occured.

but i 'm sure that i had used same parameters processed data successfully once a time

just with smooth value change from 4mm to 6mm

here are the infor that shoewed in matlab :

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