REST的 power spectum

Submitted by yubing on

请教各位老师：

    REST的 power spectum 功能，提供了基本的时间-频率转换，但是它只能针对某个像素，如果对于ROI提取的时间序列，不知如何处理，刻意直接做FFT吗？

    另外，文献中计算的BOLD“能量”是不是就是频域曲线的曲线下面积？多谢指教！

bioengman

Fri, 10/07/2016 - 13:55

Permalink

Hi ,
as I have a very short TR I skipped the slice timing, so after running co-registration, I had this warning message ( see below), but the co-registration run properly. i was just wondering did i have to worry about this warning

Warning: File: DPARSFA_run.m Line: 680 Column: 66
The temporary variable SliceOrder will be cleared at the beginning of each iteration of the parfor loop.
Any value assigned to it before the loop will be lost.  If SliceOrder is used before it is assigned in the parfor loop, a
runtime error will occur.
See Parallel for Loops in MATLAB, "Temporary Variables". 
> In DPARSFA>pushbuttonRun_Callback (line 1779)
  In gui_mainfcn (line 95)
  In DPARSFA (line 30) 
Warning: File: DPARSFA_run.m Line: 935 Column: 83
The temporary variable RefFile will be cleared at the beginning of each iteration of the parfor loop.
Any value assigned to it before the loop will be lost.  If RefFile is used before it is assigned in the parfor loop, a
runtime error will occur.
See Parallel for Loops in MATLAB, "Temporary Variables". 
> In DPARSFA>pushbuttonRun_Callback (line 1779)
  In gui_mainfcn (line 95)
  In DPARSFA (line 30) 
Warning: File: DPARSFA_run.m Line: 2683 Column: 24
The temporary variable DirImg will be cleared at the beginning of each iteration of the parfor loop.
Any value assigned to it before the loop will be lost.  If DirImg is used before it is assigned in the parfor loop, a runtime
error will occur.
See Parallel for Loops in MATLAB, "Temporary Variables". 
> In DPARSFA>pushbuttonRun_Callback (line 1779)
  In gui_mainfcn (line 95)
  In DPARSFA (line 30) 
Warning: File: DPARSFA_run.m Line: 4389 Column: 32
The temporary variable DirImg will be cleared at the beginning of each iteration of the parfor loop.
Any value assigned to it before the loop will be lost.  If DirImg is used before it is assigned in the parfor loop, a runtime
error will occur.
See Parallel for Loops in MATLAB, "Temporary Variables". 
> In DPARSFA>pushbuttonRun_Callback (line 1779)
  In gui_mainfcn (line 95)
  In DPARSFA (line 30) 


From: RFMRI.ORG <rfmri.org-bounces@rnet.co> on behalf of The R-fMRI Network <rfmri.org@gmail.com>
Sent: Thursday, October 6, 2016 6:55:07 PM
To: rfmri.org@rnet.co
Subject: [RFMRI] REST的 power spectum
 
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YAN Chao-Gan

Sat, 10/08/2016 - 06:32

Permalink

可以直接做FFT。

能量不是一个精确定义的词，功率的积分，一定程度上可以这么理解吧。

Hi,
when Im running nuisance covariate regression step i got this error 
Covariables definition text file "/data/meamic/Func/Analysis/session1/FunImgRCovs/ROISignals_Sub_95.2.txt" doesn't exist,

ang clue ?



From: RFMRI.ORG <rfmri.org-bounces@rnet.co> on behalf of The R-fMRI Network <rfmri.org@gmail.com>
Sent: Friday, October 7, 2016 11:32:12 PM
To: rfmri.org@rnet.co
Subject: Re: [RFMRI] REST的 power spectum
 
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