请教一下单样本T检验的问题

Submitted by demonpupil on
Forums

老师,您好:
  
  请教一个问题,我有病人组16个被试,利用DPARSF计算其ALFF值,然后利用单样本T检验得到病人组内ALFF显著高于全脑均值的区域A,B,C
  
  问题:如果我想单独得到被试甲的ALFF显著高于全脑均值的区域在哪里,我需要用什么方法,什么检验?刚才我单独利用被试甲或被试乙的mALFF分别做了一个单样本T检验,之后用REST slice viewer发现什么结果都没有。是否是单样本T检验要求纳入被试人数需要大于3个的原因?

盼回答,谢谢!!

fmri

Submitted by karthik.m.p on
Forums
hello
I am new to fmri analysis and am very much keen to carry forward my career in this field and would be really glad to know where i could download fmri data for research purpose.could anyone please suggest sites or links where i could dowload fmri data


thank you
karthik.m.p
msrit

About Masks in REST have different origin coordinate with SPM images

Submitted by mwst on
Forums
老师:
     你好,我使用rest提供的mask来提取全脑、CSF、白质的信号,但是我发现这些mask的中心点坐标即origin coordinate是0,而SPM里面的图像则不是。所以无论使用MRIcro的overlay还是SPM的checkreg功能,rest提供的mask与SPM里面的图像都不配,这样的话是否提取mask内的信号是可靠有效的呢?因为我不知道其计算的原理,所以在此发问,我的图像都已经是重采样后与mask相同的体素大小和坐标框。
   请老师解释一下。
mw

dparsf做功能连接,生成的结果中ROI没用用实名标识,而是用ROI1,ROI2,ROI3,.......,怎么辨认该ROI是什么?

Submitted by xuercan on
Forums
在dparsf中假如用4个ROI做功能连接,如A,B,C,D,生成的结果为ROI1,ROI2,ROI3,ROI4,请问,这里ROI1-4与A-D的对应原则是什么?是仅仅按加入时的顺序还是按ASCII的大小排序,请明示?

Positive not negative correlation maps in REST

Submitted by merrf on
Forums
Dear REST developers and experts
 
To the first, I really appreciate for providing a wonderful free software.
I've also attached the following query to the SPM mailing list.
 
I'm analysing seed-based (hippocampus) resting-state functional connectivity between patient and control groups by using spm8 and especially REST program.
The resulting zFC maps of include both positive and negative correlations.