ND Presentation State What should it do?

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ND Presentation StateWhat should it do?

• D. Sluis
• December 2, 2003, Open Discussion at WG11
  Meeting, RSNA

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Meeting Goals

• Identify functional needs for NDPS
• Clinical use cases, workflow, (prioritize)
• Actors and transactions creators users
• Features to supports
• Consensus on scope of deliverables
• Explore conceptual approach

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Some Proposed Classes of Use

• Specify views of ND images
• Created by modality, user, CAD or other
  post-processing system
• Specify views on existing 2D-frame images
• CT, MR, PET, NM
• Specify fused presentations leveraging Supplement
  73 multi-modality, atlas
• Presentation path for usability productivity
• Unburden distracting navigation tasks

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Review ND DICOM Status

• ND Presentation State motivation
• Overview of ND and prior discussion
• Functional requirements
• WG12, WG17

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2D Images Have Default Display State
Up

• DICOM 2D image
• Is array of pixels
• Has orientation
• Has Photometric Interpretation
• Grayscale Softcopy Presentation State alters or
  augments image display

Pixels
Left
Right
Down
Photometric Interpretation
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ND Instances Have No Display State

• No pixels
• No horz/vert, up/down, left/right
• No photometric interpretation
• Potentially multiple bit-plane types

Acute need for ND Presentation State
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ND Framework
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Real World Domain Mapping
Component Value
Value A
Value B
Stored Values
ComponentDimension Mapping
ValueMapping
Real World Domains
Space, time, absorbance, velocity,
Real World Domain-Centric not Sample-Centric
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Masking

• Spatial Masking
• Cut planes, bit masks, shapes
• Unions intersections
• Value Masking
• Threshold window
• Comparative values (aka write priority)

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Display Window Mapping

• Map Real World Domains to horizontal vertical
• Orthogonal, oblique, curved
• Dynamic behavior
• Cine
• Scrolling, sweeping, M-Mode
• State paths
• Fly-through, moving cut plane
• Overlapping windows
• 2D Annotation and mask

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Rendering

• Rendering type
• Tomographic
• Integrals
• Volumetric, MIP, etc.
• Shading Phong, surface
• Support coarse set of models?
• Value rendering
• Color
• Multi-layer Blending (?)
• Eg functional and anatomy
• Layer priority

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Multi-Window Display

• Bi- and multi-plane views, MPR
• M-Mode
• Synchronized display windows (shared state)

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Annotation and Graphics

• Data space
• Shapes
• Semantics
• Display space
• Overlays, graphics

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Modality and Atlas Fusion Sup73
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DICOM Supplements
Specialized ND Presentation State
WGnn
WG12
US ND Presentation State
3D/4D US (43)
Framework for ND Presentation State
WG17WG11
WG17
2003
2004
2005
2006
Approximate Time when Official DICOM
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Next Steps

• Use case and requirements consensus
• Tiered supplements?
• Work coordination consensus

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Ultrasound Example
Component Value
Echo
Doppler Velocity
Stored Value Mapping
Spatial Mapping
mm
dB
mm/s
Space
Velocity
TissueEcho