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Mon, 07/28/2014 - 00:57yeshion各位老师好： 我用MICA提取了实验组的DMN网络（选择了Z-score转换），然后利用REST的extract ROI signals工具（感兴趣区选择为PCC/PC）提取的txt文件内容代表这个网络在这个ROI上的功能连接值，也是Z-value，理解的对吗？ 还有，就是我看不懂这个txt文件，里面有“—”代表负连接？，而且后面还有e-2等等什么的，比如-2....5312 reads
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Sat, 07/26/2014 - 23:24joyao1991请教老师，论坛上的视频中提到slice viewer中打开的overlay是NIFTI格式时，左是右，右是左。严超赣老师示范了从slice viewer保存图像并用ps处理的过程。这样得到的tif图片就可以直接用于投稿了吗？不管左右相反的问题吗？4986 reads
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Fri, 07/25/2014 - 22:24joyao1991已经用SPM8得到了单个被试的任务激活图，接下来想做组分析，有以下几个疑问： 1.（1）用SPM做组分析，在Results中选择FDR校正，p值选为0.05，再用slice viewer打开生成的SPM_T图（是否需要在slice viewer中再设置p值？）；（2）用rest做单样本t检验（base是否应为0？），再用slice viewer打开生成的nii文件，p值设置为0.05，并且在misc中选择FDR校正。 （1）和（2）两种方法是否有区别？ 2.在slice...5786 reads
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Fri, 07/25/2014 - 21:28ImKiDear all, I run DPARSFA to obtain ALFF data. I used the results (zALFF) as input in SPM8 for two way ANOVA (full factorial analysis 2nd level). I got the following error: (see below). It says orientation is not the same, but I double checked and it is ras for...5574 reads
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Fri, 07/25/2014 - 09:51insular严老师，您好。 1. 我用 DPARSFA 2.3 跑 unified segmentation , 会出错： Warning: Matrix is singular, close to singular or badly scaled. Results may be inaccurate. RCOND = NaN. > In expm>PadeApproximantOfDegree at 123 In expm at 39 In...5703 reads
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Thu, 07/24/2014 - 15:38chunhuichenHi experts, I just read this paper (Bennett,2009,SCAN, The principled control of false positives in neuroimaging ), in which the auther wrote: Another method that is often...4300 reads
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Wed, 07/23/2014 - 22:19ant80Hi all, I am evaluating ReHo using REST for my analysis, and I have a few questions. I found this quote in the REST 1.1 English manual: Image file format must be ANALYZE 7.5, and MRIcron or AFNI (Cox, 1996) can be used to transform the format I...4912 reads
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Wed, 07/23/2014 - 06:39Jie123I will type in English this time and hopefully it is readable... 1) In the preprocessing, rigid-body6 is the default one. Would Friston24 be a better choice? 2) My impression is that Reho and degree centrality can not be derived from smoothed data and...4848 reads
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Wed, 07/23/2014 - 06:26Jie123您好, 我在处理数据时仍然有几个不清楚的地方向您求证: 1) preprocessing中的Head motion model, 默认是rigid-body6, 是不是选择Friston24更好? 2) Reho和degree centrality好象不能用smoothed数据, 所以要和ALFF(fALFF)分开处理. 对于Reho和degree centrality, 在DPARSF-Advanced version中, 不勾选smooth, 不勾选fALFF+ALFF, 但要选择Filter,...3912 reads
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Wed, 07/23/2014 - 01:18jma0206各位老师同学大家好， 最近用dparsf 软件处理数据时，我提取出了AAL time course，我想问一下这90个时间序列的每一个点的含义是什么，主要是其正负的含义；其次，我们能不能用一些方法将其时间序列都变为正呢？ 谢谢大家的解答！ 马杰16266 reads
