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RadLex: Unified Terminology for Radiology

RadLex: Unified Terminology for Radiology. Curtis P. Langlotz, MD, PhD Chair, RSNA RadLex Steering Committee Associate Professor of Radiology University of Pennsylvania. What is RadLex?. A successor to the ACR Index for retrieving online teaching files

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RadLex: Unified Terminology for Radiology

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  1. RadLex: Unified Terminology for Radiology Curtis P. Langlotz, MD, PhD Chair, RSNA RadLex Steering Committee Associate Professor of Radiology University of Pennsylvania

  2. What is RadLex? • A successor to the ACR Index for retrieving online teaching files • A set of terms for clinical reports in an electronic medical record • Common data elements to improve clinical imaging research

  3. Medical Lexicons for Radiology • UMLS (National Library of Medicine) • SNOMED-CT (College of American Pathology) • ACR Index for Radiological Diagnoses (ACR) • NCI Thesaurus and Common Data Elements (CDEs) • Subspecialty lexicons: ACR BI-RADSTM, ASSR-intervertebral disks, Fleischner glossaries, ... • Coding schemes: ICD, CPT, LOINC

  4. Medical Lexicons: Completeness for Radiology Langlotz & Caldwell, J Digit Imaging 15(1S):201, 2002

  5. Shortcomings of Existing Medical Terminologies for Imaging • Image acquisition techniques • MRI pulse sequences, CT parameters, imaging protocols • Image features • Low signal, high attenuation, hypoechoic • Global assessments • BI-RADS assessment categories • Anatomy only visible in context • Tendons, abdominal spaces

  6. Conclusion There is a need for a single source of common terminology for radiology.

  7. What is RadLex? • 26 participating organizations • 9 committees • 92 radiologist participants • 5,308 anatomic concepts (so far)

  8. RadLex Key Features • Adopts existing concepts from widely accepted standards (e.g., SNOMED, DICOM) • Fills gaps where radiology terms are absent • Serves as single source for radiology concepts and terms • Linked to existing term sets (e.g. CPT, ACR Index, UMLS) • Freely available, courtesy of RSNA

  9. Organizational Structure

  10. Key Collaborating Organizations • American College of Radiology (ACR) • College of American Pathologists / Systematized Nomenclature for Medicine (CAP/SNOMED) • DICOM/IHE

  11. OWL Iterative Lexicon Development Process SNOMED-CT SNOMED-CT RadLexProtégé Database RadLexweb site XML OWL RadLex base content NCI Thesaurus RadLex Lexicon Development Committees UMLS Meta-Thesaurus Lexicon Development Process

  12. What is a RadLex Term? • Unique numeric ID • Name • Narrative definition • Source(s) • Links to related terms/lexicons • Comments • Sample image(s)

  13. Findings Relationships Uncertainty Conclusions Recommendations Teaching attributes RadLex Term Categories • Patient identifiers • Clinical history • Image acquisition, processing, and display • Location on the image • Image quality • Anatomic location

  14. Relationships in RadLex • Part of (anatomy) • Is a (pathology) • Branch of (vessels, nerves) • Contained in (body cavities and spaces) • Component of (assemblies, such as joints)

  15. Status of RadLex Project • Anatomy meetings were held this fall • Draft anatomic terms available for public comment soon • Meetings winter/spring 2006 to consider findings and pathology terms • Public comment summer/fall 2006 • Release of RadLex 1.0 at RSNA 2006

  16. For More Information • Visit the RadLex web site: • http://www.rsna.org/radlex • Attend a RadLex-related session at RSNA • See poster nearby • Visit the RadLex kiosk at InfoRad • Join our mailing list

  17. Questions for DICOM • How to unify relationship with SNOMED? • Best structure to work with RadLex? WG8?

  18. Enter a search term There are 12 RadLex term categories Opening Screen

  19. Hierarchy expandsto show results in context Term details are shown BOOP Search

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