On 17 Sep 2019, at 07:07, Martin M <[log in to unmask]> wrote:
Hi, I am trying to "Translate" the MR sequence parameters of a "stock" siemens pcASL (see below/attached) to the inputs for asl_gui and I was looking for some input.
The basics of the sequence, which is attached in full, are as follows:
pcASL, TR 4,600ms, TE 16.18ms1 average / 4 measurements
Perfusion mode FAIR QIIBolus Duration 700msInversion Time 1,990ms
Is it correct, then to enter the following in the GUI:Bolus duration 0.700PLD 1.29 (i.e., TI minus BD: 1,990 - 700)
That is (I do not have calibration or fieldmaps unfortunately..):oxford_asl \
-i "asl_02.nii.gz" \
--ibf=rpt --iaf=tc --tis 1.99 --bolus 0.70 --casl \
--fslanat="MPRAGE-T1.anat" \
--wp --t1b 1.65 --alpha 0.85 --spatial --mc --artoff \-o "asl_01_dir"
Finally, do i understand correctly that, following the WP, for the future I should set:Bolus duration = 1,800ms(PLD = 1,800 ms)Inversion time (BD+PLD) = 3,6000ms?
thank you
martin
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