Dear Freesurfer experts,
I read the raw area file and the area resampled to the fsaverage space and
found several interesting things.
raw58l = read_curv('E:\fs_result\NC058\surf\lh.area'); % the range of the area
value is [-0.0471 6.2118]
raw58r = read_curv('E:\fs_result\NC058\surf\rh.area'); % the range of the area
value is [0 6.8963]
raw59l = read_curv('E:\fs_result\NC059\surf\lh.area'); % the range of the area
value is [-0.3347 5.4892]
raw59r = read_curv('E:\fs_result\NC059\surf\rh.area'); % the range of the area
value is [-1818 5.4269]
The first question, what is the unit of the area file in the surf folder (such
as lh.area), mm2? Why the minimal value of the area can be less than zero?
Subsequently, I perform further experiments, reading the resampled area file.
resamp_58l = load_mgh('E:\fs_result\NC058\surf\lh.area.fsaverage.mgh'); % the
range of the area value is [-0.0118 7.4073]
resamp_58r = load_mgh('E:\fs_result\NC058\surf\rh.area.fsaverage.mgh'); % the
range of the area value is [0 19.0191]
resamp_59l = load_mgh('E:\fs_result\NC059\surf\lh.area.fsaverage.mgh'); % the
range of the area value is [-0.3937 9.9084]
resamp_59r = load_mgh('E:\fs_result\NC059\surf\rh.area.fsaverage.mgh'); % the
range of the area value is -0.0909 8.2306[]
The second question, why the value of some area file change a lot? For example,
the maximum value of raw58r is 6.8963, but 19.0191 of resampled one.
Next,
resamp_smooth5_58l =
load_mgh('E:\fs_result\NC058\surf\lh.area.fwhm5.fsaverage.mgh'); % the range
of the area value is [0 1.7293]
resamp_smooth5_58r =
load_mgh('E:\fs_result\NC058\surf\rh.area.fwhm5.fsaverage.mgh'); % the range
of the area value is [0 2.1877]
resamp_smooth5_59l =
load_mgh('E:\fs_result\NC059\surf\lh.area.fwhm5.fsaverage.mgh'); % the range
of the area value is [0 1.2875]
resamp_smooth5_59r =
load_mgh('E:\fs_result\NC059\surf\rh.area.fwhm5.fsaverage.mgh'); % the range
of the area value is [0 1.3542]
The third question, why all the minimal values after smooth was zero? Why all
the maximal values after smooth reduce a lot?
Finally,
resamp_smooth25_58l =
load_mgh('E:\fs_result\NC058\surf\lh.area.fwhm25.fsaverage.mgh'); % the range
of the area value is [0 1.2014]
resamp_smooth25_58r =
load_mgh('E:\fs_result\NC058\surf\rh.area.fwhm25.fsaverage.mgh'); % the range
of the area value is [0 1.2611]
resamp_smooth25_59l =
load_mgh('E:\fs_result\NC059\surf\lh.area.fwhm25.fsaverage.mgh'); % the range
of the area value is [0 0.9730]
resamp_smooth25_59r =
load_mgh('E:\fs_result\NC059\surf\rh.area.fwhm25.fsaverage.mgh'); % the range
of the area value is [0 1.0119]
The final question, why all the maximal values of fwhm25 smooth are less than
the values of fwhm5 smooth?
How can I get the area value in the recon-all analyses? The cortical thickness
is the distance betwwen the white matter and the pial, but what is the
procedures the area value obtained?
Any help would be greatly appreciately!
Best,
Feng_______________________________________________
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