-1- 3DSlicer Quantitative Medical Imaging Session: Quick Overview and PET/CT Analysis Jeffrey Yap,...
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Transcript of -1- 3DSlicer Quantitative Medical Imaging Session: Quick Overview and PET/CT Analysis Jeffrey Yap,...
![Page 1: -1- 3DSlicer Quantitative Medical Imaging Session: Quick Overview and PET/CT Analysis Jeffrey Yap, Ph.D. Ron Kikinis, M.D. Randy Gollub, M.D., Ph.D Wendy.](https://reader035.fdocuments.us/reader035/viewer/2022070409/56649e725503460f94b70b44/html5/thumbnails/1.jpg)
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3DSlicer Quantitative Medical Imaging Session:
Quick Overview and PET/CT Analysis
Jeffrey Yap, Ph.D.Ron Kikinis, M.D.
Randy Gollub, M.D., Ph.DWendy Plesniak, Ph.D.Kathryn Hayes, M.S.
Sonia Pujol, Ph.D.Valerie Humblet, Ph.D.
Kilian Pohl, Ph.D.Ender Konugolu, Ph.D.Andriy Fedorov, Ph.D.
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The Slicer3 software
• An end-user application for image analysis and visualization
• An open-source environment for software development
• A software platform that is both easy to use for clinical researchers and easy to extend for programmers
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DisclaimerIt is the responsibility of the user of 3DSlicer to comply with both the terms of the license and with the applicable laws, regulations and rules.
Slicer is a tool for research, and is not FDA approved.
3D Slicer version 3 is a multi-platform software running on Windows, Linux, and Mac OSX.
www.slicer.org
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Software version
• This workshop uses a “pre-release cut” of Slicer version 3.5 which includes new features.
• Visit the slicer download page for Slicer 3.4 stable release, or for Slicer nightly builds.
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Overview: Two Hands-On Tutorials
• Getting Started: Slicer3 Minute Tutorial
• Quantitative Measurements for Functional Imaging: PET/CT Fusion Tutorial
![Page 6: -1- 3DSlicer Quantitative Medical Imaging Session: Quick Overview and PET/CT Analysis Jeffrey Yap, Ph.D. Ron Kikinis, M.D. Randy Gollub, M.D., Ph.D Wendy.](https://reader035.fdocuments.us/reader035/viewer/2022070409/56649e725503460f94b70b44/html5/thumbnails/6.jpg)
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Part 1: Slicer3 Minute Tutorial
Sonia Pujol, Ph.D,Wendy Plesniak, Ph.D.
Surgical Planning LaboratoryHarvard Medical School
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Slicer3 minute tutorial
This tutorial is a short introduction to the advanced 3D visualization capabilities of the Slicer3 software for medical image analysis.
![Page 8: -1- 3DSlicer Quantitative Medical Imaging Session: Quick Overview and PET/CT Analysis Jeffrey Yap, Ph.D. Ron Kikinis, M.D. Randy Gollub, M.D., Ph.D Wendy.](https://reader035.fdocuments.us/reader035/viewer/2022070409/56649e725503460f94b70b44/html5/thumbnails/8.jpg)
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Tutorial Dataset
The Slicer3minute dataset iscomposed of an MR scan of the brainand 3D surface reconstructions ofanatomical structures.
The data are part of the SPL-PNL BrainAtlas developed by Talos et al. The atlasis available at:http://www.spl.harvard.edu/publications/item/view/1265
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Start Slicer3
Launch the application
Windows users:
Double-Click the Shortcut to Slicer3.exe on the Desktop
or Select
Start All Programs Slicer3 3.5.2009-11-06Slicer
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GUI Overview
The Graphical User Interface (GUI) of Slicer3 integrates five components:
• the Menu Toolbar
• the Module GUI Panel
• the 3D Viewer
• the Slice Viewer
• the Slice and 3D View Controller
Slice Viewer
3DViewerModule GUI Panel
Slice and 3D View
Controller
Menu Toolbar
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Slicer Welcome
The SlicerWelcome module is the module displayed by default.
This module gives an overview of the GUI of Slicer3, and data loading & saving functionalities.
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GUI Basics
Expand or shrink the GUI panel with the arrows at the frame top, or by clicking and dragging the vertical separator
Expand or collapse any sub-panel by clicking on its grey title bar.
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Loading a 3D Scene
Browse to the location of the Slicer3MinuteDataset directory and select the scene file slicer3minute.mrml
Click on Open to load the scene
Select File Load Scene from the File menu
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Slicer displays a 3D model of the head in the 3DViewer, and anatomical MR slices of the brain in the 2D Slice Viewer.
3D Viewer
2D Slice Viewer
Loading a 3D Scene
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Please note: we have pre-adjusted the window and level settings for these volumes so that they are appropriate for display on most laptops. If display is not satisfactory on your machine or projector, the Volumes Module may be used to refine these settings.
Loading a 3D Scene
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Left click and hold the Modules menu button
Select All Modules to display the list of all 95 modules available for image analysis and 3D visualization.
Loading a 3D Scene
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To access the Models module, browse through the list of modules or click on the shortcut icon in the toolbar
Loading a 3D Scene
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Slicer displays the GUI of the module Models
Loading a 3D Scene
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3D Visualization
Position the mouse in the 3D Viewer.
Hold down the left mouse button and drag to rotate the model.
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Click on the Slice Visibility icon to display the Axial Slice in the 3D Viewer
3D Visualization
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Select the Skin model and turn the opacity of the model from 1.0 to 0.0.
3D Visualization
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The model of the skull bone and eyeballs appear through the model of the skin in the 3D viewer.
3D Visualization
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3D Visualization
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Click on the Slice Visibility icon to display the Coronal Slice in the 3D Viewer
3D Visualization
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Select the 3D model skull bone in the Model Hierarchy, and turn off its Visibility
3D Visualization
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Scroll the Coronal Slice to view the hemispheric white matter model in the context of the image data.
3D Visualization
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Select the hemispheric white matter model and turn off its visibility.
3D Visualization
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Slicer displays the optic nerve, optic chiasm and optic tracts overlaid on the MR images of the brain.
3D Visualization
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Position the mouse in the 3D Viewer, hold down the right mouse button and move the mouse down to zoom in.
3D Visualization
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Slicer3 displays a closer view of 3D anatomical structures overlaid on 2D MR slices
3D Visualization
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Part 2: PET/CT Analysis using 3D Slicer
Wendy Plesniak, Ph.D. Jeff Yap. Ph.D.
Ron Kikinis, M.D.
Harvard Medical School
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Brief Description of Quantitative Measurement
Standardized Uptake Value
• Under certain circumstances, 18FDG SUV correlates with metabolic rate of glucose and/or the number of viable tumor cells
• Simplified semi-quantitative measure that can be routinely performed in clinical PET studies
• Adjusts for differences in patient size and injected activity
SUV (time) = Radioactive Concentration x Weight Injected Activity
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Making assessments from measurements
Response criteria
• Complete response (CR): Complete resolution of all lesions
• Partial Response (PR): >= 25% decrease in SUVmax
• Stable Disease (SD): < 25% change
• Progressive Disease (PD): >= 25% increase in SUVmax
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Select File->Close Scene:
This removes any datasets previously loaded into Slicer.
Close the previous scene
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This raises the Load Scene Interface
• select the
PETCTFusion-Tutorial-Scene.mrml file
• double click the file, or click Open
Select File->Load Scene:
Load the MRML Scene
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Study Data
• Non small cell lung cancer patient
• Two PET studies: one acquired before and the other 1 month after chemotherapy
• Two non-diagnostic CT images are acquired without the use of contrast
• FDG-PET scans acquired 60 minutes after intravenous injection of approximately 20 mCi of 18FDG
• Two VOIs have been created using Slicer’s Editor Module.
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Navigate to the PETCTFusion Module
Using Modules Menubutton: Expose the menu and select the module called “PETCTFusion”.
PETCTFusion is a new and developing module.
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Select the Volumes to Display and Analyze
In the Data Fusion panel, select:
CT volume: CT1
PET volume: PET1
Tumor Mask: PET1-label
When the PET volume is selected, a “wait message” will be displayed while parameters are read from DICOM header.
*Note: Click, hold & pull down menus to select…
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In the Display Panel, choose a colorization option for the PET volume from among
Grey, Heat, or Spectrum.
Adjust the window and level for CT1 and PET1 volumes.
Adjust the Slices Fade Scale to jointly display the datasets.
Adjust the combined display of PET and CT data
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Explore the dataset
Explore:
in the Slice Viewers, scroll through the slices to locate the green Tumor label and the yellow Liver label
Note: (the yellow label is used only to demonstrate multiple-VOI functionality).
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View Tumor Label in all Slice Viewers
Shortcut: To view the Tumor Label in all Slice Viewers:
Enter –740 in the Axial Slice Viewer’s Slice Number Entry
…and…
-54 (Sagittal)
103 (Coronal)
These are mm positions within the reference frame of the image volumes.
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SUVmax and SUVmean for each VOI (represented by a different color in the label map) will be displayed in the table.
Compute SUV for all VOIs in the pre-treatment study
In the Quantitative Measures panel, click the Compute/Refresh button.
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Compute SUVbw for follow-up study
Now select:
the CT volume CT2, the PET volume PET2 and the Tumor Mask called PET2-label in the Data Fusion Panel.
This dataset contains a green VOI that corresponds to the tumor segmentation during pre-treatment study.
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Adjust the display for the follow-up study.
You may want to adjust the Slices Fade Slider and manipulate the 3D View to refresh them.
Adjust display for follow-up study
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Compute SUVbw for follow-up study
In the “Quantitative Measures” Panel, select Compute/Refresh to compute SUVbw for the green Tumor volume (and yellow liver volume).
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8.0
9.4
+16.61% (SD)
Assess response with respect to this VOI
Pre-Treatment Max SUVbw =
Post-Treatment Max SUVbw =
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Appropriate use
• Still validating this module against performance of commercial systems.
• Appropriate for DICOM PET studies only
• Not compatible with Philips datasets
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This workshop has demonstrated:
• Basic scene loading and visualization using 3D Slicer
• Workflow to make quantitative measurements of SUV in PETCTFusion module
Summary
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Slides and Datasets:
Tutorial Slides:http://www.na-mic.org/Wiki/index.php/CTSC:Slicer_handson.022410
Tutorial Data:http://wiki.na-mic.org/Wiki/images/5/51/Slicer3MinuteDataset.zip
http://wiki.na-mic.org/Wiki/images/7/73/PETCTFusion-Tutorial-Data.zip
Tutorial Software:http://www.na-mic.org/Slicer/Download/Snapshots/win32/Slicer3-3.5-RSNA-2009-11-06-win32.exe
More Information:http://www.slicer.org
Summary
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Acknowledgments
Harvard Clinical and Translational Science Center
National Alliance for Medical Image ComputingNIH U54EB005149
Brain Science Foundation
INRIA, France
Neuroimage Analysis Center (NAC)
National Center for Image-Guided Therapy (NCIGT)
Surgical Planning Laboratory, Brigham and Women’s Hospital