April 2011

Slice Timing 出故障

严老师:

您好!我在进行slice timing 时出现故障,提示如下:
The following modules did not run:
Failed: Slice Timing

??? Error using ==> cfg_util>local_runcj at 1426
Job execution failed. The full log of this run can be found in MATLAB command window, starting with the lines
(look for the line showing the exact #job as displayed in this error message)
------------------
Running job #1

PhD thesis defense

Welcome to the PhD thesis defense of two PhD candidates

8:30, April 12, 3rd floor meeting room, MRI center, State Key Lab of Cognitive Neuroscience and Learning, BNU

1. Miss Qihong Zou. Resting-State Functional magnetic Resonance Imaging---Based on BOLD and ASL Techniques.
2. Mr. Chaogan Yan. The spontaneous brain activity: resting-state fMRI network studies.

结果分析问题

严老师:
您好。我以PCC为种子点得到了正常组跟病例组的FC值,用zFC分别做了单样本T检验和双样本的T检验。正常组与PCC相关的脑区与文献相同,病例组得到的相关脑区要少于正常组,但是做了双样本T检验之后发现,病例组在单样本T检验没有出现激活的脑区,现在出现了激活,正值负值都有。例如海马旁回和枕叶,单样本的病例组并未出现任何激活区,但是做完双样本时候海马旁回出现了负值,而枕叶却出现了正值。请问这是什么原因呢?是不是我的数据有问题?该如何分析这种情况?谢谢。

请教一个关于global signal regression的问题

在Kevin Murphy(The impact of global signal regression on resting state correlations: Are anti-correlated networks introduced?)一文中:global signal regression is used as a regressor in a general linear model (GLM) to remove the associated variance.This technique assumes

咨询

严老师: 您好,我做了REHO的双样本t检验,结果如下:
为什么会有激活区跑到脑外去?是我采样的问题还是处理过程中出了问题?单样本T检验的激活区都是在脑内,而且做的ALFF的值也都是在脑内,唯独REHO的双样本T检验出现了这种情况。希望能得到您的帮助。