2009 Summer Project Week DWI / DTI QC and Prepare Tool: DTIPrep

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Home < 2009 Summer Project Week DWI < DTI QC and Prepare Tool: DTIPrep

Key Investigators

  • UNC: Zhexing Liu, Heather Cody Hazlett, Martin Styner
  • Utah: Casey Goodlett, Guido Gerig, Tom Fletcher

Objective

We are developing a GUI/command line tool for DWI/DTI QC and preparation.

  • Both a GUI and command line tool
  • "Study-specific Protocol" based
    • Handles NRRD and MINC2 formats
    • Image/diffusion information check
    • Padding/Cropping of data
    • Slice-wise, interlace-wise and gradient-wise intensity and motion check
    • Motion/Eddy current correction
    • DTI computing


Approach, Plan

The tool allows a "protocol" based execution via parameter files. The parameter file contains all the settings/preferences/options and can be created using the tool's GUI. This tool performs automated quality control, correct data if possible, possibly reject parts of the data and provide a reporting facility.

Our plan for the project week is to:

  • Add MINC2 support
  • Tune intergrations with other tools


Progress

  • Separate command-line tools for DWI QC has been uploaded into UNC NeuroLib ($NeuroLib/Applications/DWIQC)
    • DWIQCSliceChecker: for slice-wise intensity-related artifacts detection and gradient exclusion(optimized for both single and multiple b-valued DWIs).
    • DWIQCInterlaceChecker: for interlace-wise Venetian blind artifacts detection and gradient exclusion(optimized for both single and multiple b-valued DWIs).
    • DWIQCGradientChecker: for gradient-wise motion artifacts detection and gradient exclusion.
    • DWIBaselineAverager: for optimized multiple-b0 volumes average in a nrrd DWI file(optimizing is base on either all b0 volumes or all DW volumes).
  • DTIPrep will be updated soon with the upper new DWI QC tools to give better QC quality and more flexibility to the DWI/DTI QC/Prep pipeline.
  • Discussed with Ran(U. Utah) the improvement of her eddy-current and motion artifact correction tool.
  • I am still struggling with MINC2 :(.