论坛老师好!
我用REST的Correlation ananlysis,voxel wise做功能图像与临床的相关,Groop image中input图像,seed variate中input临床因子的txt文档。
问题是:在结果图像中,以0.01为阈值(Threshold:2.70),差异区域的结果报告中peak intensity为什么不是大于2.70的绝对值,而是小数?是否这个值为相关系数呢?p值对应于一个相关系数的阈值,我发现类似的一篇文章(Spatial patterns of intrinsic brain activity in mild cognitive impairment and alzheimer's disease: A resting-state functional MRI study)中,做图像与MMSE的相关,列出了相关peak点的z值,那么这个z值是否可以由REST得到的peak intensity转换过来?
谢谢!
Cluster 1
Number of voxels: 37
Peak MNI coordinate: 33 -45 -18
Peak MNI coordinate region: // Right Cerebrum // Temporal Lobe // Fusiform Gyrus // White Matter // undefined // Fusiform_R (aal)
Peak intensity: -0.82754
# voxels structure
37 --TOTAL # VOXELS--
34 Right Cerebrum
29 Fusiform_R (aal)
19 Temporal Lobe
16 Gray Matter
Queustion for Correlation analysis modality of REST
Submitted by wleewell on Tue, 10/16/2012 - 15:08
Submitted by wleewell on Tue, 10/16/2012 - 16:58 Permalink
Re: Queustion for Correlation analysis modality of REST
我看了下论坛中有列 ,converting T/F/R statistical image to Z statistical image. y_TFRtoZ.m,估计我只需要吧相关图转换为z图便可,检查发现REST1.8版本里面有这个m文件,但是怎么调用呢?matlab里面应该怎么操作呢?
非常感激!
Submitted by YAN Chao-Gan on Sun, 10/21/2012 - 10:31 Permalink
Re: Queustion for Correlation analysis modality of REST
rest_TFRtoZ可以做这件事情。
如果你要GUI的话,
你在REST->Statistical Analysis->GRF Theory Correction会自动调用这步,Z图像会作为中间结果保存出来。
Submitted by wleewell on Sun, 10/21/2012 - 19:34 Permalink
Re: Queustion for Correlation analysis modality of REST
用了下REST->Statistical Analysis->GRF Theory Correction,还是出现:
Exception occured. (MATLAB:undefinedVarOrClass)
Undefined variable "Header" or class "Header.mat"
........
之前论坛中问过这个问题,您说是图像格式的问题,我的图像是hdr/img的,用rest statistical analysis得出的T map,应该没有问题,与平时不同的是,软件界面中GRF Theory Correction模块的RUN是红色的,所以是否与软件本身有关?
谢谢!
Submitted by YAN Chao-Gan on Sun, 10/21/2012 - 20:54 Permalink
Re: Queustion for Correlation analysis modality of REST
GUI 有个bug, 已fix.
Submitted by wleewell on Mon, 10/29/2012 - 19:42 Permalink
Re: Queustion for Correlation analysis modality of REST
谢谢严老师!
我重下了新版的REST软件“REST_V1.8PRE_120905”,在GRF corretion这块,RUN还是红色的,请问是我下错了吗还是?
Submitted by YAN Chao-Gan on Mon, 10/29/2012 - 22:55 Permalink
Re: Queustion for Correlation analysis modality of REST
边框红色不影响运行。
To 鑫迪:你把这个Fig也改一下,同其他GUI一致?
Submitted by tanyongming1209 on Fri, 07/25/2014 - 20:52 Permalink
Re: Queustion for Correlation analysis modality of REST
严老师你好,GRF Theory Correction后的保存的Z_BeforeThreshold_R.nii和Z_ClusterThresholded_R.nii两个结果,在viewer中查看结果哪里查看Z值?
Submitted by gaolei6096 on Sat, 07/26/2014 - 01:14 Permalink
Re: Queustion for Correlation analysis modality of REST
Z_BeforeThreshold_R.nii是经过z转换的统计图。
Submitted by tanyongming1209 on Sat, 07/26/2014 - 18:04 Permalink
Re: Queustion for Correlation analysis modality of REST
thanks 师兄