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Ongoing BIRN-GCRC Collaborations

Ongoing BIRN-GCRC Collaborations. Medical College Wisconsin (non BIRN site) Functional MRI acquisition calibration University of Texas (non BIRN site) Expand taxonomy for neuroimaging database BWH, Harvard Medical School Enhance cardiac MRI analysis & visualization tools

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Ongoing BIRN-GCRC Collaborations

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  1. Ongoing BIRN-GCRC Collaborations • Medical College Wisconsin (non BIRN site) • Functional MRI acquisition calibration • University of Texas (non BIRN site) • Expand taxonomy for neuroimaging database • BWH, Harvard Medical School • Enhance cardiac MRI analysis & visualization tools • BWH & MGH, Harvard Medical School • Functional MRI cross-site calibration Jorge Jovicich, Ph.D. Massachusetts General Hospital - Harvard Medical School

  2. Functional MRI acquisition calibration • GCRC: • MCW • UTSA • BWH • BWH/MGH • Sites • GCRC: MCW (P.I. Steven Rao) • BIRN: UCI, Stanford • Collaboration goal • Apply FBIRN QA methods in a novel environment • Value to GCRC • Experience using the QA methods to determine that scanner quality is comparable with other sites • Value to BIRN • Validate QA methods outside of FBIRN network • Receive feedback  improve

  3. Quality Assurance: stability of MRI Signal 0.45 0.425 Typical brain 0.4 0.375 0.35 0.325 0.3 0.275 0.25 0.225 0.2 fBIRN recommendation 0.175 0.15 0.125 0.1 0.075 0.05 0.025 0 1/7/00 4/8/00 6/9/00 1/5/01 7/2/01 1/25/00 2/16/00 3/15/00 4/18/00 4/25/00 5/12/00 7/12/00 7/21/00 8/16/00 8/29/00 1/31/01 3/15/01 5/21/01 8/10/01 10/31/99 11/14/99 4/1/00#1 10/14/00 10/26/00 11/17/00 12/15/00 2/26/00#2 9/13/00#2 9/18/00#2 9/18/00#4 2/23/01#2 3/22/01#2 7/27/01#1 10/25/00#1

  4. BIRN Interactions with MCW • GCRC: • MCW • UTSA • BWH • BWH/MGH • MCW: new 3T GE MRI scanner • Interested in: • Method for assessing fMRI signal stability • Comparison with fBIRN • Doped-water phantom shipped for QA • Agar phantom being procured Sample Results

  5. Expanding taxonomy for neuroimaging databases • GCRC: • MCW • UTSA • BWH • BWH/MGH • Sites • GCRC: UTSA (P.I. Peter Fox) • BIRN: UCI • Background • Brainmap (www.brainmap.org) stores published neuroimaging results • Used for meta-analyses prior to experimental design • BIRN HID stores clinical info, fMRI metadata results, link to images • Collaboration goal: • Enable [BrainMap + BIRN HID] queries for fMRI experimental results • Need common descriptors (taxonomy) for fMRI experiments • Value to GCRCs • Improved experimental taxonomies (better BrainMap database) • Improved experimental designs (meta-analysis [BrainMap + BIRN HID]) • Value to BIRN • Improved experimental taxonomies for a better HID design • Improved query interface through integration with BrainMap

  6. Expanding taxonomy for neuroimaging databases • GCRC: • MCW • UTSA • BWH • BWH/MGH • Integrating BIRN and BrainMap data descriptions • BIRN describes data from every subject • BrainMap describes only group results • Integration & expansion of Meta-data descriptions Brain Map Expansions to include fBIRN cognitive tasks

  7. Enhance cardiac perfusion MRI analysis & visualization tools • GCRC: • MCW • UTSA • BWH • BWH/MGH • Sites • GCRC: BWH (P.I. Gail Adler) • BIRN: BWH • Background • PET standard for cardiac perfusion • Perfusion MRI has potentials • Challenge quantification due to physiological motion. Automate. • Collaboration goals Extend and apply function BIRN tools for: • Image registration algorithms (fully & semi-automated) • Interactive time-series data management • Value to GCRCs • Dissemination of improved tools (3D Slicer and Insight Toolkit) • Training, expertise sharing, requirements definition future projects • Value to BIRN • Extend and validate tools for non-brain imaging • Expertise sharing

  8. Cardiac perfusion MRI time series • GCRC: • MCW • UTSA • BWH • BWH/MGH Original sequence Corrected sequence

  9. Need for data management & manual interaction (BIRN) • GCRC: • MCW • UTSA • BWH • BWH/MGH • Interval Browser (3D Slicer) • fBIRN visualization. In development • Extensions • Load, inspect , animate DICOM cardiac perfusion MRI datasets, key frame registrations • Future work • Investigate non-rigid registration • Integrate perfusion processing in • registration

  10. GCRC: • MCW • UTSA • BWH • BWH/MGH Functional MRI cross-site calibration • Sites • GCRC: BWH (P.I. Reisa Sperling) • BIRN: BWH & MGH • Background • Longitudinal fMRI for clinical trials • Challenge: optimize reproducibility • Collaboration goal Combine expertise from mBIRN & fBIRN to quantify and improve test-retest reproducibility • Value to GCRCs • Dissemination acquisition protocols & correction methods • Improved multi-site MRI clinical trials • Value to BIRN • Test and improve calibration methods

  11. Evolution of fMRI activation Early vs. Late MCI Early MCI (N=12) Late MCI (N=11) • GCRC: • MCW • UTSA • BWH • BWH/MGH Value of longitudinal MRI studies Goal: detect neuroimaging changes before behavioural changes Hippocampus MCI: Mild Cognitive Impairment

  12. Activation in LH hippocampus Activation in LH hippocampus MGH – Siemens 3T BWH – GE 3T • GCRC: • MCW • UTSA • BWH • BWH/MGH Preliminary Test-Retest Assessments MGH BWH Test Retest LH: Left Hemisphere Statistical power estimation from measured reproducibility errors • Future work: • Optimize reproducibility metrics • Minimize variability in acquisition protocols • Introduce fBIRN & mBIRN calibration methods

  13. Acknowledgements • For all the work: • Our GCRC collaborators and BIRN • For these slides: • UCI: Jessica Turner • BWH: Wendy Plesniak, Steve Pieper, Reisa Sperling • MGH: Doug Greve

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