October 2010

大家好，请帮忙分析这篇文章的数据是怎么处理的

Submitted by nutrition-li on Mon, 10/04/2010 - 17:02

最近在看一篇文章，有些数据分析方面的问题搞不清楚，如果有人处理过类似的数据，请不吝赐教。谢谢！
MR Image Acquisition
Images were acquired with a multislice, singleshot EPI sequence to achieve whole brain coverage: 40 axial slices, TR=5 seconds, TE =35 illiseconds,
3.5-mm slice thickness, in-plane resolution 1.8 mm by 1.8 mm at the Magnetic Resonance Imaging Facility, Salford Royal NHS Foundation Trust, Salford. A SENSE 8-channel head coil was used for radio frequency transmission and reception.

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normal ditribution before RFX ananlysis

Submitted by Dinos2010 on Mon, 10/04/2010 - 13:52

Hi all,
In the article "Detection of functional networks in the resting brain" there was a step before group analysis involving transforming the individual Reho data to normal distribution. Has this function been implemented in REST ? If yes, what specific method is being used?

Thanks,
Hua

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Resting-state fMRI topics

今天碰到的几个问题

Submitted by marvelancet on Sun, 10/03/2010 - 22:16

近期碰到几个问题
拿出来大家看看：

做统计分析结果呈现的时候，因为是手动配准，用的AFNI tlrc坐标，最终结果在各种工具中呈现结果不同：
rest slice viewer效果最好，与模板匹配


同样的结果放到MRIcroN就不匹配（我用的模板和mask是同源的）
可能是MNI坐标与tlrc坐标不同的关系

在spm里面也一样 不匹配：

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Resting-state fMRI topics

dparsf潜在的bug?

Submitted by marvelancet on Sat, 10/02/2010 - 23:17

亲爱滴们：

今天碰到这样一个问题，焦头烂额：
由于这批数据需要手动配准，所以我的处理流程如下：
1. 用dparsf批处理至realign。
2.用spm做coregister.
3.用AFNI转换格式后做Normalize
4.转换个格式后，将得到的EPI相文件放入FunImgNormalized文件夹。
然后启动dparsf，
先跳过Smooth做的ReHo，很顺利，detrend, filter, reho...没有任何问题。
然后继续用dparsf做alff以及falff，操作过程如下：
    -matlab下输入dparsf
    -依次去掉smooth前所有的勾
    -选择工作目录
   - 输入时间点190
   - 选择自定义模板 

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DPARSF
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Resting-state fMRI topics

help 3: Rest Dicom Sorter

Submitted by marvelancet on Fri, 10/01/2010 - 12:08

坛主，
这批数据比较早，2005年GE机器，TR 1s, 16sl, 200TR.
使用Sorter时候报错：

??? Error using ==> mkdir
系统找不到指定的文件。

 

Error in ==> rest_DicomSorter at 38
        mkdir(dirname);

 

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rest_dicom_sorter
rest_dicom_sorter
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Resting-state fMRI topics

help 2: dparsf

Submitted by marvelancet on Fri, 10/01/2010 - 07:36

hi,

the previous error i brought up was fixed by adding the line
    "rest_Fix_Read_Write_Error"
before initializing dparsf.

however, the time between pressing the bottom "run" and actual data precessing is much longer  in the linux environment than windows (just now i experienced a 15 min lag).
so is the time for data precessing.
what might the problem be? how can i fix it?
i'm currently using double systems on my laptop, which are windows XP and linux fedora ver 12.

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DPARSF
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Resting-state fMRI topics

help: dparsf error

Submitted by marvelancet on Fri, 10/01/2010 - 01:42

Linux, fedora 12
Matlab 2010a
Dparsf lastest ver.
spm8
error:

??? Error using ==> DPARSF('editSliceOrder_Callback',gcbo,[],guidata(gcbo))
Error: This statement is incomplete.

Error in ==> DPARSF>editSliceOrder_Callback at 369
    handles.Cfg.SliceTiming.SliceOrder =eval(['[',SliceOrder,']']);

Error in ==> gui_mainfcn at 96
        feval(varargin{:});

Error in ==> DPARSF at 39

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Resting-state fMRI topics