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=== Use Case === |
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=== Architecture === === Tasks === |
[wiki:QdecProject/UseCases top]
Use Case
[http://www.xnat.org/home.html XNAT] is a sophisticated database access tool allowing query and retrieval of freesurfer processed data. The qdec functionality needs to be integrated into it in the following way:
- Via the existing XNAT web interface, the user selects a dataset to query. The existing web interface allows selection of subjects and factors of interest. A new option to the interface is the Qdec processing option, which allows selection of a small set of factors (no more than two discrete and two continuous). Once these are selected, the user clicks a 'submit' button, which submits the job to a server (by wrapping the input parameters in an XML file), and the server, having the freesurfer toolset (or at the very least mri_glmfit), performs the GLM fit.
- Once the server completes the execution of mri_glmfit, the results (found in a /tmp directory on the server), are tarballed in a file with .xar extention. The user is emailed a message that the results are complete.
- The user, once notified of the results, may download the tarball. They will then need to have a qdec for their particular architecture, which they can download via the XNAT web interface. Qdec will extract the tarball and display the results data.
The freesurfer data should already have been presmoothed at the common smoothing levels, fwhm: 0,5,10,15,20,25.
Architecture