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请问在rest中，default mask是什么（brainmask么）？

有个比较弱的问题，刚没想明白，来问一下专家。 我用FSL写了个SCRIPT做ALFF，不过对ALFF有个问题。FSL对raw data做预处理的时候，会把图像的中间值global normalize到10000左右 － the whole 4D data set is normalised by a single scaling factor ("grand mean scaling") 。这样到higher level的统计才正确。但是这样的问题是每个SUBJECT SCALE FACTOR不同，再进行FFT计算ALFF的时候，会对结果有所影响。那在REST里面怎么处理normalisation的问题的？ 谢谢

Hi,teacher Yan,after the acquired data being processed by DPARSF,a RESULT folder containing FCresult is obtained,I want do some FC research such as One sample T test,but there is a button 'Mask File',I do not know how to use this button,please explain to me? Another question,only Voxel-wise ROI can be finished in DPARSF?Then if I want do ROI-wise ,how can I realize?

I have the following issues with DPARSFA. I want to start from normalisation step for a set of images that are already realigned and slice ime corrected. I have also obtained mean images for these volumes. But when I try and start unified segmentation based normalisation, the DPARSFA starts searching for mean and does not fine it. It starts computing mean which takes a long time. The mean file is included along with 410 other images in each subject folder (410 time points, 1 mean image = in each subject folder). Where should I put the mean files?

Dear experts, I'm currently analyzing DMN (PCC/precuneus seed-based) using REST. In addition, I want to analyze sensorimotor network in groups of subjects. Is there a well-identified seed for this sensorimotor network? If yes, please let me know the accurate MNI coordinates or the article that used this seed. Thank you in advance for your kindness. Kim

请问一下，静息态fMRI扫描时，最短的时间可以是几分钟？2分钟的数据可以吗？谢谢！

我从两组人静息态指标的双样本t检验，联想到了一个问题，想不通，请指教下。 我做second level，模型估计estimate之后，会生成beta0001，beta0002文件，也就是广义线性模型的系数。还会生成con文件：当然这个是做完contrast的结果。然后还要生成spmT0001文件。这个就是我们统计之后的t map。我从网上关于spm的原理得知，这个t图貌似是用con文件和残差ResMS文件生成的？请问是这样的吗？如果是，具体的公式是怎样的呢？

上次那个关于校正的帖子不晓得怎么回复，在这里再次请教下大师。原帖http://www.restfmri.net/forum/node/672 您好，那FDR没有用到随机场校正吧。是不是fwe就是改进版的bonferroni呢，就是说bonferroni用的是：如果有10000个体素，那么bonferroni 0.05校正就是0.05/1w;如果是fwe校正，那么先用随机场理论找到这1w个体素中独立体素的个数。然后fwe就是用0.05/独立体素的个数？是这样的吗？

用DPARSF做时间序列和全脑的功能相关时，报错 Error using ==>load Unkown text on line number 1 of ASCII file /data/rsfMRI/SeedList.txt ‘Seed_Time_Course_List:’ 是txt的格式不对么？

严老师：在做Darpsf是做到detrend时报错如下： Read 3D EPI functional images: "E:\epilepsy\Analysis\FunImgNormalizedSmoothed\sub_15"................................... ??? Error using ==> copyfile 另一个程序正在使用此文件，进程无法访问。 Error in ==> rest_Fix_Read_Write_Error at 33