EGEE-III INFSO-RI-222667 Enabling Grids for E-sciencE www.eu-egee.org I. Blanquer (1), V. Hernandez (1), L. Martí (2), D. Quilis (1), J. Salavert (1) (1)

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EGEE-III INFSO-RI Enabling Grids for E-sciencE I. Blanquer (1), V. Hernandez (1), L. Martí (2), D. Quilis (1), J. Salavert (1) (1) Universidad Politécnica de Valencia – ITACA (2) Dr. Peset University Hospital Using AMGA to Store and Organise DICOM Structured Reports 4th EGEE User Forum March 2009, Catania

Enabling Grids for E-sciencE EGEE-III INFSO-RI Contents Objectives. Structured Reporting. DICOM-SR and AMGA. Future work. 2 4th EGEE User Forum March 2009, Catania

Enabling Grids for E-sciencE EGEE-III INFSO-RI Objectives of the Work Several Components and Middlewares Use Grids to Store and Organise DICOM Images –TRENCADIS, MDM, SRB. An Important Part of the Information is not stored in the Image, but in the Radiology Report. –Structured Reports can be Used to Organise Medical Images Using More Powerful Tools, From the Point of View of the Knowledge. AMGA Can be Used to Represent Knowledge and Ease Querying For Relevant Data. 3 4th EGEE User Forum March 2009, Catania

Enabling Grids for E-sciencE EGEE-III INFSO-RI Structured Report Digital Report: –Properly Stored and Coded. –Fields Agreed by the Community. –Standard Lexicon and Semantics. –Links to Images, Audio, Measures and Postprocessing Results. –Universal Medical Usage. –Based on Evidence. –Able to Reflect Experimental Results. 4 4th EGEE User Forum March 2009, Catania

Enabling Grids for E-sciencE EGEE-III INFSO-RI Conventional Report vs. Structured Report Observation of an Irregular Espiculated Mass of 7mm. of Maximum Diameter, Located on the inter- quadrant inferior line of the left breast. The Lesion Comprises Heterogeneous, Linear, grained and branched Microcalcifications Apparently a Malignant Lesion Maglinancy –Based on:  Mass Size: 7mm. Shape: Irregular Margins: Espiculated  Associated Calcification oTipus: Heterogeneous oTipus: Branched  Distribution: Grouped. 5 Free Text. There is no Structure Defined and Agreed and not Associated to Images. Structure and Lexicon Defined And Agreed. Associated to Images. 4th EGEE User Forum March 2009, Catania

Enabling Grids for E-sciencE EGEE-III INFSO-RI TRENCADIS Middleware: Concept Towards a Grid Environment for Processing and Sharing DICOM Objects –TRENCADIS Aims at the Development of a Middleware to Create Virtual Repositories of DICOM Images and Reports. –It Uses a Semantic Model for Organising the Data. –Data is Encrypted and Decrypted to Ensure Privacy Protection. –High-Performance Services are Included with the System. –Architecture Totally Based on WSRF. Objective: Creation of Virtual Shared Repositories of Medical Images. –Complementary to PACS. –Intended Mainly for Research and Training. –Multicentric and Multiuser. –Data to be Shared is Explicitly Selected. –Data is Pseudoanonimised Before Entering in the System. 6 4th EGEE User Forum March 2009, Catania

Enabling Grids for E-sciencE EGEE-III INFSO-RI DICOM Structured Reporting: Concept DICOM Structured Reporting Defines a DICOM- Compatible Format to Specify Structured Electronic Reports. DICOM-SR Defines, Through DICOM Information Object Definition (IOD) Data Sets and Information Entity (IE) Data Element Objects, the Way to Specify Concepts and Coding Schemas. DICOM-SR Defines Three IODs –Basic Text, Enhanced SR, Comprehensive SR. –IEs are Structured in a Tree-Shape Each IE a Name / Value Pair, in Which the Name Comprises Three Items: Code Value, Code Schema and Code Meaning. 7 4th EGEE User Forum March 2009, Catania

Enabling Grids for E-sciencE EGEE-III INFSO-RI DICOM Structured Reporting: Templates DICOM-SR Does not Define Which Fields Should be Included. Templates are Being Provided and Agreed at DICOM –A Template is a Tree Structure with a Fixed set of IEs. –Defined in the “DICOM Content Mapping Resource" (DCMR) Supplement. –DICOM Working Group 15 Provides the Computer-Aided Detection Templates for Mammography (sup. 50), the Chest CAD (sup. 65), Patient History (sup. 75), and Breast Report (sup. 79). –Other Templates for catheterization, Ventriculography, Intravascular US, US Obstetrics and Gynecology, Vascular US, Echocardiography, and Fetal and Pediatric Echocardiography. 8 4th EGEE User Forum March 2009, Catania

Enabling Grids for E-sciencE EGEE-III INFSO-RI TRENCADIS Middleware: Data Model Semantic Organisation –Users Organise Themselves on Virtual Communities. –From the Studies Available, Only Those Matching the Selection Criteria of the Virtual Community Profile are Accessible. –From the Images Available to a Virtual Community, a User Can Create an Experiment with the Studies Matching a Set of Restrictions. –From this Experiment, More Detailed Views can be Obtained. –The Criteria for the Selection of the Relevant Information Relies on the DICOM Tags of the Image and the Structured Report. View: (e.g. Patients Between 1 and 2 Years with hetrogeneous Supratentorial Findings) Experiment: (e.g Neuroblastoma) User Comunity (e.g. Paediatric Neuroimaging) Global Database: All the Images and Reports Shared 9 4th EGEE User Forum March 2009, Catania

Enabling Grids for E-sciencE EGEE-III INFSO-RI TRENCADIS Middleware: Data Model Seven Templates Have Been Generated By the Experts –Report for the Staging of Malignant Liver Neoplasia, Small and Non-Small Cell Lung Cancer and Intraaxial Tumours of Central Nervous System. –Follow-up Reports for Liver Metastasis, Lung Carcinoma and Intraaxial Tumours of Central Nervous System. The Reports are Structured and Coded Using the Rules of DICOM-SR. Standard Coding (Mainly DICOM) Has Been Used When Possible, Following the DICOM-SR Rules To Introduce New Coding Schemas. The Reports Generate Automatically the TNM Staging Code (From the Radiological Information) in the Cases of Liver and Lung. 10 4th EGEE User Forum March 2009, Catania

Enabling Grids for E-sciencE EGEE-III INFSO-RI Work in Progress: Support for AMGA Databases A DICOM Study is then a Pair DICOM-SR + DICOM Images. –DICOM Images Could be Huge and Comprise from one to Thousands of Files.  SEs are Good Storage Means (Either TRENCADIS DICOM Interaction Components or MDM SRM DICOM). –DICOM-SR Require a Relational or Documental Database.  AMGA is a Good Candidate to Standardise the Interface. Finding = Malignant Mass Finding= Mass Shape= Round Location= Central Size= 1,5cm. Margins= Irregular Malignancy Has Properties AMGA SchemaDICOM SR Tree 11 4th EGEE User Forum March 2009, Catania

Enabling Grids for E-sciencE EGEE-III INFSO-RI Increase of Expressivity 12 Problem: Retrieve all the ID Reports from the Patients that have a Staging Value of II with an Heterogeneous Secondary Lesion. SELECT Patients.SRID FROM (Patients INNER JOIN Stages ON Patients.PID = Stages.PID) INNER JOIN Lesions ON (Stages.PID = Lesions.PID) AND (Stages.IDS = Lesions.IDS) WHERE ((Stages.IDS="StageII") AND (Lesions.IDL="2") AND (Lesions.CONTENT = “Heterogeneous")) Find /root/STAGE_II/Findings/Lesion_2 ‘like (CONTENT, ”Heterogeneous”)’ 4th EGEE User Forum March 2009, Catania

Enabling Grids for E-sciencE EGEE-III INFSO-RI Work Developed: Support for AMGA Databases Three Tools –Translate a DICOM-SR Template into an AMGA Schema. –Insert a DICOM-SR File in an AMGA Database. –Retrieve a DICOM-SR File From an AMGA Database. Benefit from the AMGA Features –Security and Authorisation. –Replication and Reliability. –Efficiency and Performance. –Standardisation and Availability of Services. –Better Expressivity. 13 4th EGEE User Forum March 2009, Catania

Enabling Grids for E-sciencE EGEE-III INFSO-RI Creation of the AMGA Structure Different Hospitals Have Different Templates But They Can Agree on Basic Items and Codifications.

Enabling Grids for E-sciencE EGEE-III INFSO-RI Creation of the AMGA Structure 4th EGEE User Forum March 2009, Catania

Enabling Grids for E-sciencE EGEE-III INFSO-RI Upload of DICOM-SR Objects 4th EGEE User Forum March 2009, Catania

Enabling Grids for E-sciencE EGEE-III INFSO-RI Fetching DICOM-SR Objects 4th EGEE User Forum March 2009, Catania

Enabling Grids for E-sciencE EGEE-III INFSO-RI Working Lines Implementation of Standardised Supplements such as CAD in Mammography (Sup. 79). Integration with Grid Medical Imaging Components, such as TRENCADIS. Performance Evaluation, through Experiment Comparing Relational and Tree-like Searches. Potential Improvements –Federation of AMGA Branches at a Single Mount Point  This would Improve Performing Parallel Searches on a Shared Mount Point. –Currently Implemented Through Multiple Distributed Queries in Different AMGA Servers. 4th EGEE User Forum March 2009, Catania

Enabling Grids for E-sciencE EGEE-III INFSO-RI Conclusions The use of AMGA Trees Enhances the Expressivity of Metadata when Organising Medical Images by the Content of the Medical Record. –DICOM-SR Structure Fits Well AMGA Tree-Like Organisation. Preliminary Results Show an Acceptable Overhead with Respect to Relational Queries. –Three Components Have Been Developed. AMGA Provides VO-Based Authorisation Management, Replication and Federation. Usability Could be Improved if Federation Would Include Mounting Multiple Trees in a Single Point. 4th EGEE User Forum March 2009, Catania