Dear Jungmoon,
These are two distinct options within the toolbox. On the one hand using the "load phase" and "load mag" buttons you can enter data and a field map will be created. In this case no entry is needed for the "pre-calculated field map" button. A second option is to load and examine a field map that has already been calculated, e.g. by the toolbox. This is when you should use the "pre-calculated field map" button.
Best wishes,
Martina
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Hello I'm Jungmoon Lee
I have a question when I using the SPM Fieldmap toolbox.
I want to make a fMRI fieldmap,
I make other indexes(magnitude and phase) fulled, but there is another index to input 'precalculated unwrapped fieldmap'.
How to make 'precalculated unwrapped fieldmap'? (Actually, I don't know exact meaning of precalculated fieldmap.)
In SPM Manual, I could create that previously using Fieldmap toolbox or by other means.
But I can't find any solution to make 'precalculated unwrapped fieldmap' in spm or google.
I'm novice using spm and there are any adviser and senior researcher in my lab.
Please give me an "detail" advice or related link to make 'precalculated unwrapped fieldmap'.
Thank you.
Sincerely, Jungmoon
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