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The Nighres project has released some 7T MRI datasets and tools to run them. You can read the paper on the tools here, and download the datasets from NITRC here.


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It looks like fslroi is the tool I'm looking for. To temporally truncate a scan the usage would be fslroi <input> <output> <tmin> <tsize> where <tmin> would be zero and <tsize> would be the number of volumes you want to keep. Now I just need to figure out how many volumes make up 7 minutes...


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No. The key term that will help you look for research about this is the word "biomarker". There are certainly correlations with autism and some of the measurement techniques, but they aren't specific enough to be used for diagnosis. Plitt et al 2015 compared fMRI classification to a behavioral scale in high-functioning ASD vs IQ-matched typically ...


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The biology underlying the BOLD response is much slower than typical TRs, so I would say on one hand it doesn't really matter because the TR interval is not the time scale that matters. On the other hand, if you are presenting stimuli of duration where the TR matters, those stimuli are occurring too quickly to be resolved separately using fMRI. You may be ...


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The BOLD response is used in fMRI to provide a quantified measure of activation: https://en.wikipedia.org/wiki/Haemodynamic_response. It is based on the ratio of oxygenated vs. non-oxygenated blood, implying blood flow, and inferred to mean more processing or activation of those brain areas.


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This is not a circular question. In fact, using fMRI to create targets is useful to determine TMS targets outside of the motor cortex or visual cortex. See the study here that used fMRI during a task to generate TMS targets, and then applied theta burst stimulation to those targets: https://www.pnas.org/content/113/21/6059 BOLD contrasts are very useful ...


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(f)MRI does not have good temporal resolution. If that is needed something like EEG or MEG is used, but the latter have low spatial resolution (hard inverse problem). Also note that the low temporal resolution of fMRI is due to BOLD response time (i.e. it's not just the case that the current fMRI technology sucks) fMRI’s temporal resolution is limited ...


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This is a slightly older post, but the Wikipedia article is basically correct. It is a non-committal range of 1mm - 5mm. Typically high resolution fMRI will probably be <= 1mm on a side, but is typically going to be higher field scanners (>>= 3T) or using slightly different sequences than the standard fMRI sequence. Best thing to do would be to do a ...


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[This is an older post, but...] A brain atlas is going to, typically, be a set of images or volume that is labeled anatomically or functionally. Typically one would take a single volume of data and register or align it to the atlas (or vice-versa). Parcellation is a way of segmenting sub-regions of a particular region of the brain. (What a "region" is or "...


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