Basic Validation of DICOM objects using DVTk

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Basic Validation of DICOM objects using DVTk
Piyush B DVTk developer
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Basic Validation of DICOM objects

• media\media.pdvt
• Validation Concept
• Definition Files
• Media Validation
• Validation Results and Analysis
• Easy to Use DVT Scripts

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Overview of DVT
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Capabilities

• Data driven tool and core is independent of
  specific DICOM SOP Classes and Test Cases -
  allows future extension as the DICOM Standard
  evolves.
• Capable of playing the role of SCU and SCP.
• Emulator for Verification, Storage and Print SOP
  Classes.
• Media File validation.
• Provides clear test results - including a summary
  of errors / warnings.
• Support for TLS and SSL secure sockets.

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DVTk validation can be identified as

• Validation of Association Negotiation Control
  Service Elements (ACSEs) - Association Request,
  Acceptance, Rejection, Release and Abort support.
• Validation of DICOM Message Exchange (DIMSEs) -
  Service Object Pair Class support.

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Validation against the DICOM Standard and/or
System Definition

• DVT provides an independent measurement of the
  accuracy of the Products DICOM interface
  according to the
• DICOM Standard
• Products Conf. Statement
• Input in DVT for this information is the
  Definition File.

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Validation Concept
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DICOM Definition File
The Definition Files provide DVT with the DICOM
specific knowledge to enable a validation.

• Describes a single DICOM SOP class
• ExampleStorage SOP Class SC Image
• Corresponding File SecondaryCapture.def

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Content of a Definition File
Attribute Condition
Attribute Type
Attribute Values
Multiplicity
Value Representation
Attribute Name
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Results Files

• DVT stores the results of each test (either by
  Scripts, Media Validation or Emulation) in XML
  files.
• Two types of XML files
• Detailed (all DVT output logged)
• Summary (only errors and warnings are logged)
• DVT uses a XSLT style sheet for displaying the
  XML files.

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2 types of Results files
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DVT Results Reporting

• Results are generated in XML
• Easily data exchange
• Can be handled as data
• Presented in HTML
• Can be customized by changing the style sheet
• Gives you the advantages of HTML web pages
• Generate overall test reports
• Easily include multiple test data
• Include test analysis data

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DVT Results Reporting
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DVT Results Reporting
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Media Validator

• DVT can validate the content of a DICOMDIR and a
  DICOM Media file.

Media Read
DICOM Object SOP Class X
Test System
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Media Results Files

• DVT writes one summary and one detailed XML file
  for each
• Directory Record
• DICOM file
• When the media validation is completed DVT
  generates an summary and a detailed index XML.

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Validation of a DICOMDIR

• DVT will validate
• the structure of the DICOMDIR
• check the presence of the referenced files
• the referenced andpresent DCM fileagainst the
  SOP Classdefinitionof the DCM File

--------------------------------------------------
---------------- VALIDATION RESULTS for DATASET
File Meta ----------------------------------------
--------------------------

"Dicom Meta Information" M
-----
--------------------------------------------------
---------- V Tag VRVTPValue(s)
Name/Results ---------------------
--------------------------------------------
(0002,0000) UL1 0x000000BA186 Group
0002 Length (0002,0001) OB1
"C\Program Files File Meta
\DVT\media
Information
\B08_0026.pix" Version (0002,0002)
UI1 "1.2.840.10008.5. Media Storage SOP
1.4.1.1.12.1"
Class UID (0002,0003) UI1
"1.3.46.670589.17 Media Storage SOP
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DICOMDIR Results Files
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DVT Script Types

• Script Types
• DICOM Scripts (DS)
• DICOM Super Scripts (DSS)
• Visual Basic Scripts (VBS)
• Script Approach
• Simple DICOM Command based (DS/DSS)
• Advanced Multi-Threaded Event Driven (VBS)

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DVT Script Types

• Example of a DICOM Script

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DVT Script Types

• Example of a Visual Basic Script

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Running a SuperScript using DICOM and system
Definition Files
storage.pdvt store_scu.ses
store_scp.ses
Scriptsession
Scriptsession
Association RQ
Association AC
Store RQ
Store RSP
Image Y
Image Y
Release RQ
Release RSP
store_scu.dss
Test System
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Example scripts

• Example Verification
• Execute SCU against SCP
• verification.pdvt (SCU and SCP 1 script)
• Example Modality Worklist
• Execute SCU against SCP
• worklist.pdvt (SCU and SCP 1 script)
• Example Storage
• Execute SCU against SCP
• storage.pdvt (SCU and SCP 3 script)

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