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5 votes

MRI maximum field strength

Technically, higher main magnetic field strength doesn't mean more resolution. There are three parts to the scanner: 1) main magnetic field, 2) gradient coils and 3) RF coils. The main magnetic ...
brechmos's user avatar
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4 votes
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Why do water molecules diffuse along axons direction?

The movement is just the thermal energy motion you describe, not due to any concentration difference. The anisotropy is due to the geometry. White matter tracts are effectively a dense bundle of thick,...
Bryan Krause's user avatar
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3 votes
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What is the response vector in the fMRI GLM model?

Short answer The units aren't important, and are typically normalized. Longer answer The name "BOLD" is actually very instructive: Blood Oxygenation Level Dependent contrast (or signal). BOLD is ...
Bryan Krause's user avatar
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2 votes
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Where can I find free authoritative images of different species of Lagomorphs?

Wikipedia is good for this, The licence is what you want, and many people will have checked the animal ID. look up the two pika species, and the rest are under http://en.wikipedia.org/wiki/Leporidae
Polypipe Wrangler's user avatar
1 vote

Issues obtaining Fo in DIY Imaging Fluorometer

This paper1 gives a definition of all the various parameters. F0 (that's Fzero, not F letter "o" I think) is defined as the dark state fluorescence. There is a second parameter F0' that is ...
bob1's user avatar
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1 vote

What is the most detailed living-tissue scan available

I assume you are asking what is the most high-resolution in vivo imaging that science has performed to date? I think the best way to answer such questions is to explain the nature of the question. ...
S Pr's user avatar
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1 vote
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Inhibitory functional connectivity

On Neuroimaging Analysis But being highlighted means being active (at least more active than other regions) This is not the case in functional connectivity analysis, or indeed not necessarily the ...
TheChymera's user avatar
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1 vote
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How does Line Integrate work on a laser scanning confocal microscope?

Most microscope software provides options for line average or line integrate as a function that helps the signal to noise ratio when taking an image. Averaging sums the lines and then divides by the ...
user1850479's user avatar
1 vote

MRI maximum field strength

is there limit of human body of how much strong magnetic fields it can handle safely which means there is limit to how strong MRI magnets we can use? The 2018 {1} study concluded: Where feasible, ...
Franck Dernoncourt's user avatar
1 vote

Recording policies in functional magnetic resonance imaging

If I recall correctly, in BOLD fMRI an echo-planar imaging (EPI) sequence is typically used. In one example: 44 slices were acquired, every 3 seconds, 96 times in a row, leading to a total number ...
noumenal's user avatar
  • 111
1 vote

How are fMRI responses to auditory stimuli measured?

I could have found this article earlier, but as things go, I didn't. But possibly it contains most of what can be said to this question: Jonathan E. Peellej, Methodological challenges and solutions ...
Hans-Peter Stricker's user avatar
1 vote

Why does Stereology use Systematic Random Sampling?

Systematic sampling refers to a method where all samples have an equal probability of being chosen but the spacing between samples is constant. That is, although each individual section is equally ...
Bryan Krause's user avatar
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