Difference between revisions of "2010 Summer Project Week Liver Ablation"

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<h3>Objectives</h3>
 
<h3>Objectives</h3>
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* denoising and bias field correction of 3D US data
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* Build a system for surgical planning and navigation to guide RF liver ablation.
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* model for the combined image correction, segmentation and registration between 3D US and MRI
 
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* visualization of all processing steps within Slicer
 
 
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<h3>Approach, Plan</h3>
 
<h3>Approach, Plan</h3>
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The bias field on the 3D US data varies spatially with a very low frequency. It is similar to the bias field effects in MR caused by magnetic inhomogeneities. We will investigate whether an EM-based approach may be used for the correction, similar to the previous work by Wells et. al. and Pohl et. al., and try to adapt the already existing Slicer code to this problem.
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The workflow reads as follows [after segmentation]:
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# Export the segmentation to the planning program.<br>
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For the registration, we may have to come up with a new formulation that uses not only the statistics of the intensities, but also some additional information about the tissue boundaries. The tissue boundaries are directly influencing the visible content of the 3D US images, however, they have a different appearance and structure within the MRI.
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# Run the planning program.<br>
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# Load the plan specified in an xml file into Slicer for visualization and modification.<br>
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# User can view the plan. Ablations are overlayed onto the image slices. Ablation locations are from the xml file and the size of the sphere is already available in Slicer before step 1.<br>
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# User can move ablation locations.<br>
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# Export the modified plan.<br>
 
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<h3>Progress</h3>
 
<h3>Progress</h3>
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Fill this at the end of the week
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* Got tracking data from Aurora system using IGSTK
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* Can read surgical plan from an xml file
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* Can write surgical plan to an xml file
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* Working on visualization and modification of a surgical plan possibily using Measurements module
 
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Latest revision as of 13:34, 25 June 2010

Home < 2010 Summer Project Week Liver Ablation

  • Liver with fiducials

  • Liver with fiducials and segmentation

  • Liver model

Key Investigators

  • BWH: Haiying Liu, Noby Hata, Sota Oguro
  • Georgetown University: Ziv Yaniv

Objectives

  • Build a system for surgical planning and navigation to guide RF liver ablation.

Approach, Plan

The workflow reads as follows [after segmentation]:

  1. Export the segmentation to the planning program.
  2. Run the planning program.
  3. Load the plan specified in an xml file into Slicer for visualization and modification.
  4. User can view the plan. Ablations are overlayed onto the image slices. Ablation locations are from the xml file and the size of the sphere is already available in Slicer before step 1.
  5. User can move ablation locations.
  6. Export the modified plan.

Progress

  • Got tracking data from Aurora system using IGSTK
  • Can read surgical plan from an xml file
  • Can write surgical plan to an xml file
  • Working on visualization and modification of a surgical plan possibily using Measurements module

Delivery Mechanism

The work will be evolved as a Slicer module for surgical planning.

References

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