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DICOM Ontology (DO) Update

DICOM Ontology (DO) Update. Building a cathedral, one grain of sand at a time March, 2009. Presenters. Daniel Rubin M.D., M.S. Assistant Professor of Radiology Stanford University. David S. Channin, MD Associate Professor of Radiology Northwestern University. Charles E. Kahn, Jr., MD, MS

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DICOM Ontology (DO) Update

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  1. DICOM Ontology (DO) Update Building a cathedral, one grain of sand at a time March, 2009

  2. Presenters Daniel Rubin M.D., M.S. Assistant Professor of Radiology Stanford University David S. Channin, MD Associate Professor of Radiology Northwestern University Charles E. Kahn, Jr., MD, MS Professor of Radiology Medical College of Wisconsin Curtis P. Langlotz, MD, PhD Associate Professor of Radiology University of Pennsylvania

  3. DICOM DICOM is the global standard for medical imaging Comprises 20+ years of combined knowledge from engineers and radiologists from academia and industry 16 Parts; Over 125 Supplements; 3583 PAGES! Subsets of DICOM used extensively in many caBIG Imaging Workspace projects Current DICOM standard not computationally-accessible to reuse; limits interoperability

  4. Needed by many,understood by few DICOM lacks a computable reference information model Hinders interoperability in applications Inconsistent use of controlled terminology or relations Specified in PDF documents; not computable Duplication of effort in workspace projects Potential conflicts among different models that represent same imaging information DICOM is HUGE time consuming to review and understand

  5. DOverview: Death by Bureaucracy • DO Phase I FY08 • Planning contract • DO Phase II FY09 • Pilot Ontology development of 1 IOD (CT) • DO Phase III FY10 ?? • IODs 2,3,4,5,6 • DO Phase IV FY11 ?? • IODs 7,8,9,10,11 • DO Phase V FY12 ?? • IODs 11,12,13,14,15 • DO Phase XIV FY20 ?? • IODs 50,51,52,53,54 • DO Phase XV-XX FY21-FY26 ?? (DSC,DLR,CPL,CK retire at age 65) • New IODs since FY10

  6. Overview of Phase II (FY09) Purpose: Develop a unified knowledge model based on the scope of radiology domain in DICOM Scope: DICOM is BIG; project is scoped initially to reviewing/modeling one IOD (CT) Goals: Develop prototype ontology and begin developing synergies with existing projects

  7. Phase II Goals Produce initial skeletal structure of the DICOM ontology based on reviewing a single Information Object Definition (IOD) Create DICOM ontology containing the entities and relations needed to describe the IOD content. Define approach to generalize our approach to extend DICOM ontology to rest of the DICOM standard

  8. Project Tasks Identify and review pertinent portions of DICOM: Focus on a single IOD Review E-R diagrams in DICOM: Identify elements incorporate into the oncology Reconcile DO for modeling inconsistencies in DICOM Compile ontology components: Enumerate the key terms comprising the ontology, and identify the content that should be modeled as classes and relations Build initial DICOM Ontology: Translate relevant portions of DICOM standard into a structured format that can be imported into an ontology authoring tool such as Protégé

  9. DO Progress Reviewed CT IOD and DICOM standard CT IOD Relevant parts of DICOM extracted from part 6, part 3 and some of part 16 Produced initial DICOM ontology Patient (Study, Series, and Image remain) DICOM Modules and Macros DICOM Data Dictionary Data Elements and Data Element Types

  10. Raw CT IOD in DICOM

  11. DICOM Ontology in Protege

  12. Patient Module in DICOM

  13. Patient Name in DICOM Ontology

  14. Questions?

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