相关分析求助

 求教各位老师,
       我先做了某个ROI voxel wise的功能连接后,将全组人这个ROI的FC和某个认知任务的的得分做了相关分析。为什么得出的数据格式是.nii, 我以前做出来的都是.img 和.hdr两个文件?是不是哪里出错了?
谢谢各位老师指教!


vbm 分析

3DT1图像用DARTEL分析,灰质c1开头的文件经过“Normalize to MNI space”后出现了下图这样的图像,分析步骤也在下边,请问我该怎么解决?期待您的回复,谢谢!

Forums: 

扫描参数的一些问题

 各位老师和同学:

我对扫描参数一直了解不多,最近在写论文时有一些困惑,问题如下:
1. REST的旋转角记录的是标准角,请问标准角是指多少度呢?
2. T1的旋转角记录的是矢状位,这个又是多少度呢?
3. 我们数据的TR是2530(在北师大采的数据),但我看很多研究里面T1的TR是7-8ms,而另一部分则是1000-3000ms,为什么差别这么大呢?

提前感谢!

GCA

Dear Experts
Hi

I have identified DMN using ICA algorithm and I would like to examin effective connectivity using GCA.
As far as I know unlike functional connectivity,effective connectivity is presented as a set of nodes (regions) and edges. How should I specify nodes and edges?How could I obtain path coefficients?
Many thanks in advance.

老师,请教下这个应该算什么脑区有差异

Cluster 7 Number of voxels: 287 Peak MNI coordinate: -3 -24 51 Peak MNI coordinate region: // Left Cerebrum // Frontal Lobe // Medial Frontal Gyrus // Gray Matter // brodmann area 6 // Paracentral_Lobule_L (aal) Peak intensity: 4.0519 # voxels structure 287
--TOTAL # VOXELS-- 241 Frontal Lobe
155 Right Cerebrum
136 Gray Matter
127Paracentral Lobule
124 Left Cerebrum
107 Medial Frontal Gyrus
92 White Matter
81 brodmann area 6
64 Cingulum_Mid_R (aal)
57 Supp_Motor_Area_L (aal)
52 Supp_Motor_Area_R (aal)
37 Paracentral_Lobule_L (aal)
36 Cingulum_Mid_L (aal) 35 Paracentral_Lobule_R (aal)
34 brodmann area 31
33 Limbic Lobe
28 Cingulate Gyrus
17 Sub-Gyral
11 brodmann area 5 10 brodmann area 24 8 Inter-Hemispheric 5 Parietal Lobe 4 Precuneus_R (aal)

Segmentation by DARTEL Templates

 Hello DPARSFA researchers,

I'm working with two different subject populations - one which has 31 rfMRI slices and 240 time points and one which has 36 slices and 300 time points. There are a couple of patients who have different numbers of slices as well (e.g., 32 and 33). So far, I've run:

关于Dpabi分析、看图的一个问题(可以在这里提问吗?非常感谢)

 各位老师好:
       请教:1. 用dpabi做REHO的统计学分析,在统计学计算时没有加BRAIN mask,看图做Alphasim时加Brain mask的得到的结果,与在统计学计算时加BRAIN mask,看图做Alphasim时加Brain mask的得到的结果完全不同,哪个是对的呢?
                2. 同一组被试前、中、后,3个时间段比较是否应该用ANCOVA(repeated measure)分析,之后再做两两分析时一定是在ANCOVA有意义的区域才可以,对吗?