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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 - PowerPoint PPT Presentation
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Curtis P. Langlotz, MD, PhDChair, RSNA RadLex Steering CommitteeAssociate Professor of RadiologyUniversity of Pennsylvania
RadLex: Unified Terminology for Radiology
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
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
Medical Lexicons: Completeness for Radiology
4%9%
14%9%
42%
71%
50%50%
52%
87%
63%63%
0%
25%
50%
75%
100%
ICD9 SNOMED UMLS
FSG:eDict: LSVT:Mean
Langlotz & Caldwell, J Digit Imaging 15(1S):201, 2002
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
Conclusion
There is a need for a single source of There is a need for a single source of common terminology for radiology.common terminology for radiology.
What is RadLex?
• 26 participating organizations
• 9 committees• 92 radiologist participants• 5,308 anatomic concepts (so
far)
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
RadLexSteering
Committee
RadLex MSKLexicon Development
Committee
Other RadLexLexicon Development
Committees…
RadLex TechnicalTask Force
RSNA RadLexStaff
Organizational Structure
Key Collaborating Organizations
• American College of Radiology (ACR)
• College of American Pathologists / Systematized Nomenclature for Medicine (CAP/SNOMED)
• DICOM/IHE
NCI Thesaurus
Iterative LexiconDevelopment Process
SNOMED-CT
RadLex Lexicon Development Committees
XMLRadLex base
content
OWL
OWL
RadLexProtégé
Database
SNOMED-CT
RadLexwebsite
UMLS Meta-Thesaurus
Lexicon Development Process
What is a RadLex Term?
• Unique numeric ID• Name• Narrative definition• Source(s)• Links to related terms/lexicons • Comments• Sample image(s)
RadLex Term Categories
1. Patient identifiers2. Clinical history3. Image acquisition,
processing, and display
4. Location on the image5. Image quality6. Anatomic location
7. Findings8. Relationships9. Uncertainty10.Conclusions11.Recommendation
s12.Teaching
attributes
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)
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
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
Questions for DICOM
• How to unify relationship with SNOMED?
• Best structure to work with RadLex? WG8?
Opening Screen
There are12 RadLex
term categories
Enter a search term
BOOP Search
Hierarchy expandsto show results
in context
Term details are shown