Submitted by taofly on Tue, 10/29/2013 - 14:31
根据xjview里显示的cluster及peak点,选取最大峰值点作为小球roi的中心,下一步要做效应连接,但是一个T值很大的cluster的三个峰值点坐标都是白质的,比如xjview显示“ // Left Cerebrum // Frontal Lobe // Sub-Gyral // White Matter // undefined // Frontal_Inf_Tri_L (aal)"这是已经用了灰质mask了,而且cluster里白质还挺多,请问老师怎么选取roi中心好呢。可以选取这个落在白质区的最大peak点么,还是选择落在灰质区的Frontal_Inf_Tri_L,但不是最大的激活点作为roi中心呢?
1955 Left Cerebrum
1795 Frontal Lobe
1226 White Matter
810 Inferior Frontal Gyrus
609 Middle Frontal Gyrus
601 Frontal_Inf_Tri_L (aal)
565 Gray Matter
364 Precentral_L (aal)
288 Frontal_Inf_Orb_L (aal)
260 Frontal_Mid_L (aal)......
Submitted by jigongjun on Fri, 11/01/2013 - 10:11 Permalink
Re: xjview里根据peak点选取roi
XJview的报告只能给个参考,建议用你的研究被试的平均T1像(MNI空间),做underlying,来判断你的激活区在什么位置。
Submitted by taofly on Mon, 11/04/2013 - 18:38 Permalink
Re: xjview里根据peak点选取roi
谢谢老师!请问您说的方法是指在dparsfa预处理时选择T1来normalize而不是用EPI模板么,麻烦您再指点一下,十分感谢!
Submitted by jigongjun on Mon, 11/04/2013 - 21:49 Permalink
Re: xjview里根据peak点选取roi
是的 ,可以利用T1来做功能像的配准,然后将MNI空间的T1在组上做个平均,作为你显示统计结果的underlying。
Submitted by taofly on Mon, 11/04/2013 - 23:22 Permalink
Re: xjview里根据peak点选取roi
老师,这一点不太会操作,麻烦问您下“将MNI空间的T1在组上做个平均,作为你显示统计结果的underlying。”是通过spm的xjview么,怎么操作,谢谢您!
Submitted by jigongjun on Tue, 11/05/2013 - 01:16 Permalink
Re: xjview里根据peak点选取roi
每个人的T1都转到MNI空间后,放在一个文件夹下,然后用rest-----“utilities”-----“Image calculator”求得该组人的平均T1像。
然后你用rest sliceviewer看结果的时候,选这个平均T1像作为underlying。
Submitted by taofly on Tue, 11/05/2013 - 08:57 Permalink
Re: xjview里根据peak点选取roi
十分感谢老师的耐心解答!
Submitted by Learner--ECNU on Tue, 11/05/2013 - 10:13 Permalink
Re: xjview里根据peak点选取roi
老师我想追问一个,这个underlying是不同的模板对于Xjview或者Rest viewer显示结果有什么影响?还是用自己的T1像做的模板显示会更准确点
Submitted by jigongjun on Tue, 11/05/2013 - 16:41 Permalink
Re: xjview里根据peak点选取roi
用自己所有被试做出来的T1看结果图,来定结果位置更准确啊。
Submitted by admin on Sat, 11/02/2013 - 00:11 Permalink
Re: xjview里根据peak点选取roi
Check results with REST SliceViewer by Yoke:
1. load MNI template and load your statistical overlay
2. open a new SliceViewer by clicking "SliceViewer" button in the top of "Yoke" and "Crosshair"
3. Check Yoke for both SliceViewer
4. Open AAL template in new opened SliceViewer
5. Click a position in your statistical overlay and check where it is in the yoked AAL SliceViewer