Here you will find all of the data you will need to run the examples associated with the primer: Introduction to Perfusion Quantification using Arterial Spin Labelling.
Please note that the data is provided for training purposes and should not be used for research without permission.
This dataset uses pcASL labeling and a single post-labeling delay. This dataset follows as closely as posisble the recommendations of the ASL Consensus Paper on a good general purpose ASL acquisition, although we have chosen to use a 2D mutli-slice readout rather than a full-volume 3D readout.
The files contained in the archive are:
asltc.nii.gz - the label-control ASL series containing 60
volumes. That is 30 label and 30 control in pairs of alternating images with
label first, for BASIL tools this is --iaf=tc.aslcalib.nii.gz - the calibration image, a (largely) proton-density
weighted image with the same readout (resolution etc) as the main
ASL data. The TR for this data is 4.8 seconds, which means there
will be some T1 weighting.aslcalib_PA.nii.gz - another calibration image,
identical to aslcalib.nii.gz apart from the use of
posterior-anterior phase encoding (anterior-posterior was used in
the rest of the ASL data). This is provided for distortion
correction.T1.nii.gz - the T1-weigthed anatomical of the same
subject.
Data download
This data supplements the Single PLD pcASL one above, adding mutli-PLD ASL data in the same subject (collected in the same session). This dataset used the same pcASL labelling, but with a label duration of 1.4 seconds and 6 post-labelling delays of 0.25, 0.5, 0.75, 1.0, 1.25 and 1.5 seconds.
The files contained in the archive are:
asltc.nii.gz - the label-control ASL series
containing 96 volumes: each PLD was repeated 8 times, thus there are
16 volumes (label and control paired) for each PLD. The order in
which these was collected was a full set of PLD, followed
by another, etc. For asl_file this is the same as
setting --ibf=tis - the data is grouped as repeats of
the whole set of PLDs (TIs).csfmask.nii.gz - a mask, in the same space as the
ASL data, of the ventricles for use in calibration. This is simply
the result of previously running oxford_asl on the data
and is provided to save time when running the examples.
Data download
This data contains the subset of measurements made from a group of eight subjects (but we only use seven here) both at rest and when subject to visual plus motor stimulation. The acquisition was almost identical to the Multi PLD pcASL data.
the files contained in the archive are:
subject1 - a subdirectory containing the data from
one subject that inlcudes: rest.nii.gz pcASL data
during resting, task.nii.gz pcASL data when stimulation
was being applied, calibration_head.nii.gz a
calibration image with a TR of 6 seconds,
calibration_body.nii.gz a calibration image (TR 6
seconds) using the body coil to permit correction for coil
sensitivity, T1.anat the T1 strucutral image having
been analysed using fsl_anat.perfusion_study.nii.gz - perfusion images from
seven individuals both at rest and during stimulation combined into
a single image in MNI152 standard space.design.* - design matrix files for statistical
inference, created with Glm.
Data download