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DICOM in Surgery - Recent activities and new DICOM Supplements

DICOM in Surgery - Recent activities and new DICOM Supplements

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DICOM in Surgery - Recent activities and new DICOM Supplements

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  1. DICOM in Surgery - Recent activities and new DICOM Supplements Dr.-Ing. Oliver Burgert oliver.burgert@medizin.uni-leipzig.de Innovation Center Computer Assisted Surgery (ICCAS) Universität Leipzig Germany

  2. Overview • DICOM WG-24 “Surgery” • Recently developed Supplements • Surface Segmentation • Implant Templates • Implantation Plan • Current project • Optical Surface Scan • Others • Conclusion

  3. DICOM WG-24 „Surgery“ • DICOM WG-24 aims on writing DICOM Supplements for Surgery. • It has one permanent voting representative in WG-06 • DICOM WG-24 has currently over 100 members from industry, medical practice and academia. • Organization in • Clinical Project Groups • Technical Project Groups • Everyone of you can participate!

  4. DICOM WG-24 „Surgery“ DICOM Working Group 24 „Surgery“ • SurfaceMesh • Implant Templates • Implantation Plans

  5. DICOM SurfaceMesh Module • DICOM Sup. 132 containsmodulefordescriptionofpolyonalsurfaces • Methods: • Analysis ofSurgical Workflows (DICOM WG-24) • Analysis ofmorethan25 fileformats • Development of a DICOM datastructurebased on pointsandmeshing

  6. Implantation Planning • Digital implantation planning is of increasing importance • Issue: No commonly accepted file format for implant templates Digital 2D Planning Digital 3D Planning

  7. Workflow Implantation Planning Start Planning Select & Load Images Extract Models Locate Anatomical Landmarks Select Template(s) Register Template(s) Leg length change: 5mm Mobility: 60° Predict Outcome Finish Planning

  8. Implant Templates • 2D Drawings • 3D Models • Anatomical landmarks • Combination of components • Meta-data • vendor • withdrawal • indication • …

  9. Component List Componentconnections Components Combination Planing Information Intraoperative Information Connection templates User defined landmarks Derivedlandmarks Patient Data Registration Visualization Implantation Plan Implantations Plan

  10. Information flow OR-Room OR Display Modality (CT,MRT,…) Planing Workstation Navigation- system Bilder Bilder Plan Plan OR report PACS

  11. Information Objects

  12. Attribute-Structure of Implant Templates Analog for: Implant Assembly Template Implant Template Group

  13. Healthcareprovider Data flow • Responsibility • Update • Withdrawal • Archiving ImplantManufacturer Planning Software Vendor PACS Vendors

  14. Optical Surface Scanner - Usecases

  15. Use Case: Septorhinoplasty

  16. Optical Surface Scanners • Twopossibilitiestostorescannerdata Scanner Rawdata 3d object Point clouds, surfacemeshes, textures, device-specificattributes, 3d models External Post-processing PACS Optical Surface Scan, WG-24 meeting, 2010-06-23, C. Dressler

  17. Changestothe DICOM Standard VL Photo IOD Twonew IODs IOD New IEs each IE Rawdata Surface Add Module New Modules Add Module Module Frame of Reference Point cloudmodule UV-Mappingmodule UsetheMesh Module Macro Usingexisting Points Macro New Macro New DCM codes

  18. Attributes for Meshes • In 2008, DICOM Supplement 132 “Surface Segmentation” was accepted. • Points  • Topology  • Normals • Properties X

  19. Coordinate Systems • Thisrequestfor DICOM Work Item isforthedevelopmentof a Universal Coordinate System (or Universal DICOM Frame of Reference). • Thissystem will selectas a “standard” oneofseveralexisting DICOM IOD’sordefinitions (e.g. theimage-centric, patient-centric, or environmental-centriccoordinates). • Work Plan: • 1.Recruit memberstocontributetothis Work Item • 2.Agree on “approach” • 3.Select Universal Coordinate System or “Universal DICOM Frame of Reference” • 4.Create listof IODs tobeselectedorwritten • 5.Check foroverlapwith Workgroup 2 • 6.Select “Use-Case” toserveasexample • 7.Complete requestfor Work Item • 8.Review atnextmeeting (RSNA 2009) • 9.Submit requestforwork item • Interested?  Leonard Berliner, NY Methodist Hospital

  20. DICOM WG-24 „Surgery“ - Conclusions • Current Status: • Sup. 132 “Surface Segmentation”, introduces surface meshes (Standard since 2008, jointly with WG-17) • Sup. 131 defines “Implants”, (Letter Ballot finished) • Sup. 134 defines “Implantation Plans”, (Letter Ballot finished) • Other Supplements are in preparation: • Optical Surface Scan Modality (Work Item granted) • Coordinate Systems • Attributes for Meshes • Volumetric Meshes • Patient Specific Implants • We appreciate any input and discussion

  21. Thank you for your attention!I’m looking forward to your questions and contributions Acknowledgements The Innovation Center Computer Assisted Surgery (ICCAS) at the Faculty of Medicine at the University of Leipzig is funded by the German Federal Ministry for Education and Research (BMBF) and the Saxon Ministry of Science and the Fine Arts (SMWK) in the scope of the initiative “Unternehmen Region” with the grant numbers 03 ZIK 031 and 03 ZIK 032. It is also sponsored by funds of the European Regional Development Fund (ERDF) and the state of Saxony within the frame of measures to support the technology sector.