欢迎到静息态功能磁共振成像论坛
Welcome to the forum of resting-state fMRI

关于提取感兴趣区值的问题

老师:
   您好,我在计算完两组被试的DC之后,进行双样本T检验,把有显著差异的脑区提取出来,然后想对每组被试提取感兴趣区域的mDC值。
请问:
1.ROI的制作是用对应ALL模板中不同脑区的阈值提取脑区作为mask好还是采用以Peak点为中心的球形ROI比较好呢?
2.提取感兴趣区域是不是把每组所有被试的各ROI值提取出来,然后用SPSS统计比较两组的差异吗?可不可以对每组被试的单样本T检验校正后的cluster结果提取ROI值?
谢谢您!

DPARSF ReHo calculation problems

Dear REST experts:

I have some problems of process about ReHo production during DPARSF.

Running job #1
------------------------------------------------------------------------
Running 'Smooth'
Done 'Smooth'
Done

Moving Smoothed Files:subject001 OK

Removing the linear trend:

请教臧老师一个审稿意见的回答

 臧老师,您好!

我一个fMRI研究收到了两个比较难以回答的审稿意见,想向您请教下:

1. 我同时记录了两组被试(假设为组A和B)、两个阶段(反应阶段 和 反馈阶段)的fMRI结果,分别对两组被试在两个阶段的大脑激活模式进行了分析。

在报告数据时,我使用了三种阈值:

针对反应阶段:组内比较使用的阈值是 FDR<0.01, K>50;组间比较是FDR<0.05, K>50;
针对反馈阶段:组内比较和组间比较的阈值都使用FDR<0.001,K>50.

Bounding box to create data with 4x4x4 voxel size in MNI space?

Hi Dr. Yu-feng Zang and collegues,
I'm Wi Hoon in South Korea. I'd like to convert voxel size of 3x3x3 to 4x4x4 in MNI space using DPARSFA or SPM. 
Could you tell me bounding box imformation for 4x4x4 voxel size (e.g., [-90 -126 -72; 90 90 108] for 3x3x3 voxel size)?

Best,
Wi Hoon

VMHC within DPARSFA pipeline

I've have a question doing VHMC within the DPARSFA pipeline. The default outputs of VHMC include both VMHC and zVMHC files. The zVMHC file seems to reflect a Z-transform of the VMHC file, performed on every voxel inside a default brain mask. However, the default mask includes the midline slice that has perfect correlation with itself.

error in DPARSFA

Dear teachers:
Added is the errors when running ‘new segment+DARTEL’ using DPARSFA. But when running ’segment‘ it can work well. Actually, I can find cfg_util in spm8. Could you tell me the reason? Thank you very much!
The following modules did not run:
Failed: New Segment

Added new function of "corr(i1,i2,'spatial')" in REST Image Calculator. (DONG Zhang-Ye)

Dear Dr. Dong

I notice a new function added into REST Image Calculator, "corr(i1,i2,'spatial')" .

What is the 'spatial' correlation between image 1 and image2?

Is there any ref. about this  'spatial' correlation?

Thanks.

REST-GCA paper mistake in formula wrriten.

A wrriten mistake in transformation of F values to F' values in REST-GCA paper was pointed out by Mr. WU Guorong. We thank Mr. Wu for the correction and we confirmed the REST-GCA toolkit code is correct.
We apologize to readers for this mistake. In the readme file of REST-GCA, this formula is correctly presented. Users could download the readme file in REST-GCA section.

MRI有明确病变的被试可以用DPARSF进行分析吗

 老师您好:

       我发现大部分针对静息态的研究被试都是常规MRI没有明确病灶的,那么对于常规MRI能够发现病变的能否运用DPARSF软件进行分析,或者说能否进行静息态脑功能研究呢?谢谢!

这种情况应该用multiple regression 还是one-way ANOVA between subjects

大家好,有个问题请教下:
      我在试验中收集有午睡习惯的被试每周的午睡天数,有4 5 6 7共四个选项,如果我想找到午睡习惯可能影响到的脑区(使用VBM数据),应该是使用multiple regression 还是one-way ANOVA between subjects哪?如果使用one-way ANOVA between subjects的话,contrast vector应该怎么设置才能满足我的目标那?
      谢谢!

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