Transcript RadLex ECC Report

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
• 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, ASSRintervertebral disks, Fleischner glossaries, ...
• Coding schemes: ICD, CPT, LOINC
Medical Lexicons:
Completeness for Radiology
100%
87%
71%
75%
50%
52%
50%
50%
63%
63%
42%
25%
4%
14%
9%
9%
FSG:
eDict:
LSVT:
Mean
0%
ICD9
SNOMED
UMLS
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
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
Organizational Structure
RadLex
Steering
Committee
RadLex Technical
Task Force
RadLex MSK
Lexicon Development
Committee
RSNA RadLex
Staff
Other RadLex
Lexicon Development
Committees
…
Key Collaborating Organizations
• American College of Radiology (ACR)
• College of American Pathologists /
Systematized Nomenclature for Medicine
(CAP/SNOMED)
• DICOM/IHE
Lexicon Development Process
RadLex
web
site
SNOMEDCT
RadLex
base
content
XML
RadLex
Protégé
Database
SNOMEDCT
OWL
NCI Thesaurus
RadLex Lexicon
Development
Committees
Iterative Lexicon
Development Process
UMLS MetaThesaurus
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 identifiers
2. Clinical history
3. Image acquisition,
processing, and display
4. Location on the image
5. Image quality
6. Anatomic location
7. Findings
8. Relationships
9. Uncertainty
10.Conclusions
11.Recommendations
12.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
Enter a search term
There are
12 RadLex
term categories
BOOP Search
Hierarchy expands
to show results
in context
Term details are shown