dicom in surgery - recent activities and new dicom supplements
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DICOM INTERNATIONALCONFERENCE & SEMINAR
Oct 9-11, 2010 Rio de Janeiro, Brazil
DICOM in Surgery - Recent activities and
new DICOM Supplements
Dr.-Ing. Oliver Burgertoliver.burgert@medizin.uni-leipzig.de
Innovation Center Computer Assisted Surgery (ICCAS)
Universität Leipzig
Germany
Overview
1. DICOM WG-24 “Surgery”
2. Recently developed Supplements– Surface Segmentation– Implant Templates– Implantation Plan
3. Current project– Optical Surface Scan– Others
4. Conclusion
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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!
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DICOM WG-24 „Surgery“
DICOM Working Group 24 „Surgery“– Surface Mesh– Implant Templates– Implantation Plans
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DICOM Surface Mesh Module
• DICOM Sup. 132 contains module for description of polyonal surfaces• Methods:
– Analysis of Surgical Workflows (DICOM WG-24)– Analysis of more than 25 file formats– Development of a DICOM data structure based on points and meshing
Implantation Planning
Digital implantation planning is of increasing importance Issue: No commonly accepted file format for implant templates
Digital 2D PlanningDigital 3D Planning
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Workflow Implantation Planning
StartPlanning
Select & LoadImages
Extract Models
Locate AnatomicalLandmarks
Select Template(s)
Register Template(s)
FinishPlanning
Predict Outcome
Leg length change: 5mm
Mobility: 60°
Implant Templates
• 2D Drawings• 3D Models
• Anatomical landmarks
• Combination of components
• Meta-data– vendor– withdrawal– indication– …
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Implantation Plan
Implantations Plan
RegistrationVisualization
Intraoperative Information
Component ListComponents
Combination
Connection templates
Component connections
Derived landmarks
Planing Information
User definedlandmarks
Patient Data
Information flow
Modality (CT,MRT,…)
Planing Workstation
Navigation-system
OR Display
OR report
Bilder
Plan
OR-Room
PACS
PlanBilder
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Information Objects
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Attribute-Structure of Implant Templates
ManufacturerFrame of Reference UIDImplant NameImplant SizeImplant Part NumberImplant Template VersionReplaced Implant Template SequenceImplant TypeOriginal Implant Template SequenceDerivation Implant Template SequenceEffective DateTimeImplant Target Anatomy SequenceNotification from Manufacturer Sequence[…]Materials Code Sequence[…]HPGL Document SequenceContour Surface Number ReferenceSurface Model Parameter SequenceSurface Model Scaling FactorMating Feature Sets Sequence[…]
Analog for:Implant Assembly TemplateImplant Template Group
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• Responsibility• Update• Withdrawal • Archiving
Data flow
Implant Manufacturer
Planning Software Vendor
PACS Vendors
Health care provider13
Optical Surface Scanner - Use cases
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Use Case: Septorhinoplasty
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Optical Surface Scan, WG-24 meeting, 2010-06-23, C. Dressler
Optical Surface Scanners
• Two possibilities to store scanner data
Raw data3d object
Scanner
ExternalPost-processing PACS
Point clouds, surface meshes, textures, device-specific attributes,3d models
Changes to the DICOM Standard
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Two new IODs
Raw data Surface
New IEs each
New Modules
Point cloud module
UV-Mapping module
Using existing
Points Macro
New Macro
Use the Mesh Module
IE
Module
IOD
Macro
Add Module
New DCM codes
Add Module
Frame of Reference
VL Photo IOD
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Attributes for Meshes
• In 2008, DICOM Supplement 132 “Surface Segmentation” was accepted.
• Points
• Topology
• Normals
• Properties X
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Coordinate Systems
• This request for DICOM Work Item is for the development of a Universal Coordinate System (or Universal DICOM Frame of Reference).
• This system will select as a “standard” one of several existing DICOM IOD’s or definitions (e.g. the image-centric, patient-centric, or environmental-centric coordinates).
• Work Plan:– 1.Recruit members to contribute to this Work Item– 2.Agree on “approach”– 3.Select Universal Coordinate System or “Universal DICOM Frame of Reference” – 4.Create list of IODs to be selected or written– 5.Check for overlap with Workgroup 2– 6.Select “Use-Case” to serve as example– 7.Complete request for Work Item– 8.Review at next meeting (RSNA 2009)– 9.Submit request for work item
• Interested? Leonard Berliner, NY Methodist Hospital
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
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DICOM INTERNATIONALCONFERENCE & SEMINAR
Oct 9-11, 2010 Rio de Janeiro, Brazil
Thank you for your attention!
I’m looking forward to your questions and contributions
AcknowledgementsThe 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.
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