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ITK Tutorial Presentation Slides-951
 

ITK Tutorial Presentation Slides-951

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http://hdl.handle.net/1926/161

http://hdl.handle.net/1926/161

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    ITK Tutorial Presentation Slides-951 ITK Tutorial Presentation Slides-951 Presentation Transcript

    • ITK Meets the Virtual Soldier GE Global Research Bill Lorensen, Jim Miller Dirk Padfield, James Ross Wes Turner [email_address]
    • Outline
      • Atlas Quality Control
      • Model Generation
      • Implicit Anatomical Modeling
      • Registration
      • Model Refinement Usinig Level Sets
    • Activities
      • Atlas from NLM
      • Reconciled labels
      • Registered slices
      • Computed bounding boxes
      • Calculated adjacencies
      • Generated models using vtkDiscreteMarchingCubes
      • Colored models
      • Registered atlas to CT
      • Atlas as seed for level sets
      • Deformation of man to woman
    • Atlas Quality Control
      • Thorax Atlas consists of 411 70mm camera cryo-section slices and corresponding segmentation label maps
      Slice Resolution: 2048 x 1350
    • Atlas Quality Control
      • Labeled 407 structures
      • Registered 70mm film images
      • Reconciled labels throughout entire volume
      • Computed bounding boxes for all labels
      • Removed some “dusty” structures
        • Automatic reassignment
    • Overlay.tcl
    • Atlas Quality Control Left Sixth Rib Segmentation Dust removed via “voting”
    • Model Generation
      • Generated four types of models from segmentation labels
      Discrete Decimated (90%) Colored Smoothed
    • Model Generation
    • Model Generation
    • VHM Thorax Models
    • Implicit Anatomical Modeling
      • Label = f(X,Y,Z)
      X,Y,Z I,J,K Label
    • Implicit Anatomical Modeling 0 mm: right_ventricle 2 mm: pericardium 3 mm: left_ventricle 52 mm: mediastinum 53 mm: left_upper_lobe_of_lung 66 mm: superior_lingular_branch_left_pulmonary 68 mm: left_upper_lobe_of_lung 107 mm: unknown 112 mm: left_fourth_rib 117 mm: serratus_anterior_muscle 123 mm: unknown 186 mm: pectoralis_minor_muscle 191 mm: deltoid_muscle 259 mm: unknown 261 mm: subcutaneous_tissue_of_trunk 271 mm: skin_of_trunk
    • Implicit Anatomical Modeling
    • RGB to CT Registration
    • RGB to CT Registration
    • Deformable Registration
    • Model Refinement Using LevelSets
    •  
    •  
    • LevelSet Model Refinement
      • Powerful technique to track the evolution of surfaces using image based constraints and forces
      • Three techniques investigated
        • Threshold Level Set
        • Laplacian Level Set
        • Canny Level Set
      • All techniques are part of Insight Toolkit (itk)
      But: Algorithm parameter space is high!
    • Load Sharing Facility
      • 256 3.2 Ghz Dual Processor Xeon
      • 2 gig of memory each
      • Jobs scheduled with Load Sharing Facility (LSF)
        • Platform Computing Corporation
      • LSF Toolkit
        • GE Research front-end and monitoring
    • LSF Toolkit
    • Laplacian LevelSet DOE Threshold Advection Curvature 1000 runs in 50 minutes!
    • Threshold Advection Curvature
    • LS Threshold Selection using IsolatedConnected Initial Using Threshold LS Using IsolatedConnected LS
    • ThresholdLevelSet
    • 3D IsolatedConnected LS Model vs. Initial Model Left ventricle and ascending aorta Pulmonary Trunk
    • ITK Meets the Virtual Soldier GE Global Research Bill Lorensen, Jim Miller Dirk Padfield, James Ross Wes Turner [email_address]