====== MT ======

[[https://mriquestions.com/mt-imagingcontrast.html|Magnetization Transfer]] ratio from a two sequence (MT/noMT) MRI during [[:grants:pet:mr]] where MT/noMT pairs were repeated before and after task. ''/Volumes/Phillips/mMR_PETDA/scripts/MT''

<code>
3dcalc -overwrite \
       -prefix MTR1.nii.gz \
       -m $MT \
       -n $noMT \
       -a $anat \
       -expr '(1-m/n)*bool(a)'
...

3dcalc -prefix MTR_pdiff.nii.gz \
       -o MTR1.nii.gz -t MTR2.nii.gz \
       -expr '(t-o)/o'
</code>