Introduction to Region of Interest (ROI) Analysis in fMRI
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- čas přidán 24. 03. 2017
- How to perform ROI analysis in the fMRI package SPM. More details about the commands can be found here: andysbrainblog.blogspot.com/20...
Note: Around the 1:10 mark, I take the average over only seven voxels, but divide by 8. That's because there is an extra cube in the lower left whose face isn't showing, and it was too difficult to point to it without the screen getting too busy. So just assume it doesn't exist
Really appreciate having such a visual intro to this topic, it makes the whole thing a bit more intuitive for a beginner like me.
I don't you know cause everything has a infinity of particles to infinismally explore also our minds are designed to forever ♾️ hold onto to information ℹ️
Wow this has just summarised something that I have been struggling to get my head round for so long...needed this thank you!
Glad it helps!
Great videos! it's a good way to get into this world. Thanks!
Need more videos like this !! Thank you !!
Excellent series! Y have a very basic question as a newbie in fMRI analysis, and wasn't sure where to ask about it. So I will shoot here: MY TR is 2 seconds. If an event starts according to the "Presentation log" at second 2,5 after fMRI scanning started recording (pulse, I suppose), which scan should I take as the start of that event? What is the rule? Thanks!
By selecting a contrast image as the base, aren't you "double dipping"? I'm struggling to understand the utility of ROI analysis - if we select coordinates a priori but the contrast image that we use is not showing an effect, then the ROI would just be noise, but if it does show an effect then of course our ROI will show something, but what more does it add than simply visualizing the contrast?
Also, would you be able to point me to a resource that shows how to perform whole-brain correlation from a seed? I can't seem to find any information.
Thanks
Hi Andy,
Thanks a lot for all the neuroimaging videos. They are really very helpful.
I have a doubt (not related to this video). I want to calculate the sulcal depth of the brain. Can u suggest how do i proceed or any tools that automate this process?? I used CAT12. But it displays a 3D brain image and gives the sulcal depth in the form of a color bar. I want a single valued result (mean value) for each subject.
Thanks a lot.
Regards,
Michelle
Hey Michelle, that sounds like something FreeSurfer may be able to handle. I'm not sure about that though; you'll have to check their documentation.
-Andy
Congrats Dr Indranath Chatterjee 🥰🥰
The endings of your videos are like easter eggs
Thanks for posting this, very informative! But could I ask why at 1:10 you calculated 7 numbers yet divided by 8? Thanks!
That was an oversight on my part; only 7 numbers are visible, but there are 8 numbers total in that ROI.
-Andy
Is there a way to do ROI analysis without marsbar?
Yes, you can use the SPM command spm_get_data: andysbrainblog.blogspot.com/2014/07/quick-and-efficient-roi-analysis-using.html
-Andy
Hi Andrew, can't find the Scientifc Reports paper? Is it published?
Coka Hu Unfortunately I had to retract it! They thought I faked the results!
No way, How ridiculous they are! Have you posted elsewhere? Could I read it? Thanks!
Coka Hu Sorry, it was a joke! I photoshopped the title onto a Nature paper. The study doesn't exist (although I wish it did)
All right~~but a bunch of interesting studies which similar to your title really existed, maybe it's a good idea to do it~