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A Glimpse at the emerging A Glimpse at the emerging Enhanced XA/XRF ObjectEnhanced XA/XRF Object

(DICOM Supplement 83)(DICOM Supplement 83)

Heinz Blendinger (Chair DICOM WG-02),Rainer Thieme

Siemens Medical Solutions

Presented by Bas Revet, Philips Medical Systems

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Presentation outlinePresentation outline

• The emerging XA/XRF StandardThe emerging XA/XRF Standard– Difference to other Enhanced IODsDifference to other Enhanced IODs– Clinical Benefit of Enhanced XAClinical Benefit of Enhanced XA

• Call for ParticipationCall for Participation

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The add-ons of Supplement 83The add-ons of Supplement 83(Rev 11)(Rev 11)

• New Functional groups (not complete)– Projection Pixel Calibration Macro – Table Position Macro – X-Ray Collimator Macro – Reversed Modality LUT Macro– X-Ray Field of View Macro– Frame Pixel Shift Macro

• Multi-frame Presentation Module• Enhanced XA/XRF Image Module Attributes• X-Ray Detector / X-Ray Image Intensifier Modules• XA/XRF Mask Module

ALL these improve Functionality & InteroperabilityALL these improve Functionality & Interoperability

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New functionality: an exampleNew functionality: an example

Dimension Module in enhanced XA images.Dimension Module in enhanced XA images.

• Rotational Angiography examination can include frame “position” relative to the cardiac cycle as structural information.

• Dimensions can be used to group multi-frame image frames taken at identical positions of a stepping table device.

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ECG-gated Cardiac Application

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New attributes

• Simple Filter Factor• DSA Window Values (Contrast/Brightness)• Dedicated Reversed Modality DeLog LUT• Dedicated Sequence to Reference other

plane for Biplane• Acquisition Context attributes

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Multi-Frame Presentation ModuleEdge Enhancement

Not the same, but “closer”

XA Object: private encodingReason: Hard to “standardize” Algorithms

Approximation XA enhanced:Attribute for “applied percentage”

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Dedicated Calibration Module

• Attributes to describe iso-centric geometry• Include Table plane in geometric context• Object plane relative to table

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Internal Calibration for Quantitative AssessmentsInternal Calibration for Quantitative Assessments

=> Practical solution based on user experience

°Rot°Ang

D = # Px * Px * SOD / SID

SOD = (ISO - (TH-TO) / cos°Rot) * cos°Ang

Object Plane

SID

SODTO

TH

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Supplement 83 RoadmapSupplement 83 Roadmap = Meeting of the WG- 02 (green indicates the meetings already hold)

= Meeting of the WG- 06 (green indicates the meetings already hold)

Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4

2002 2003 2004

Q1 Q2 Q3 Q4

2005

WG- 02 writes the draft of the supplement

« Enhanced XA ».

Re- activation of the WG-02. Identify list of requirements of the new XA

WG-06 reviews the draft

WG-02 updates the supplement

Public comments

WG-02 updates the supplement

Supplement Draft

Supplement issued for

public comments

Supplement In letter ballot

Supplement In final text

WG-06 includes the supplement in the standard

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Further workFurther work• Differentiation on “processed” or “original” Differentiation on “processed” or “original”

contents needed?contents needed?– Super SOP Class and SOP Classes for particular useSuper SOP Class and SOP Classes for particular use– Allowed / blocked applicationsAllowed / blocked applications

• ““Cut-line” between shared and non-shared Cut-line” between shared and non-shared contentscontents

• Further new attributes to support new Further new attributes to support new applications or procedures.applications or procedures.

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SummarySummary• The New DICOM The New DICOM enhancedenhanced XA/XRF Objects: XA/XRF Objects:

– will enhance interoperability – will increase cross system functionality– will create platform for new applications

• Success requires more clinical inputSuccess requires more clinical input

– Use CasesUse Cases– Requirements for new applications and Requirements for new applications and – ProceduresProcedures

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Further Information / ContactsFurther Information / ContactsPlease contact WG-02 chairmanHeinz.Blendinger@siemens.com

Supplement 83 Draft can be found at :http://dclunie.com/dicom-status/status.html

Next meetings:March 4th and 5th, 2004 at NEMAMay 4th and 5th, 2004 at SFR, ParisEnd of August, 2004 in Munich (ESC)

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Thank you for your attentionThank you for your attention