Transcript Sureda_WG02_SPIE_2010.ppt

DICOM WG-02
Advances in X-Ray Angiography
Projection Imaging and 3D
SPIE Medical Imaging
2010, San Diego
Authors:
Heinz Blendinger
Bas Revet
Francisco Sureda
Siemens Healthcare
Philips Healthcare
GE Healthcare (Chair DICOM WG-02)
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Presentation Outline
Introduction
Overview of X-Ray Angiography in DICOM
X-Ray N-Dimensional Presentation Cases
3D Shutter
Volume Subtraction
Stabilized Region in Moving Volume
Trajectory Tracking in Volume
2D-3D Blending
Conclusion
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Overview of X-Ray Angiography in DICOM
Approved in the
Standard
X-Ray Acquisition
2D Projection Images
Supp 94:
Radiation Dose
Reporting
Supp 83:
Enhanced XA/XRF
Supp 140:
Presentation State
3D Reconstruction
Supp 116:
X-Ray 3D
Storage
Work in
Progress
Follow-up of IHE
REM Profile
CR-DX Dose
Reporting
Supp 139-LB:
Enhanced XA
Informative Annex
X-Ray 3D Informative
Annex
N-Dimensional
Presentation State
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Workflow in X-Ray N-Dimensional Presentation
X-Ray
Acquisition
Procedure
Enhanced
XA Storage
SOP Class
Reconstruction
Procedure
X-Ray 3D
Storage SOP
Class
In progress
N-D Presentation
State SOP Class
X-Ray
Calibration
Procedure
Calibration
Data
Proprietary
Visualization
X-Ray Acquisition
System
X-Ray 3D
Reconstruction
System
Visualization
3D Visualization
Systems
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X-Ray 3D Angiography – Rotational Acquisition
Frame #5:
X-ray settings 5
Geometry settings 5
Frame #4:
X-ray settings 4
Geometry settings 4
Frame #3:
X-ray settings 3
Geometry settings 3
Optimized 3D
Reconstruction
Frame #2:
X-ray settings 2
Geometry settings 2
Frame #1:
X-ray settings 1
Geometry settings 1
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X-Ray 3D Angiography – Presentation State
Needs for 3D Angiography Presentation
– Presentation features common to all 3D modalities (rendering...)
– Speficic presentation of X-Ray 3D Angiography:
• Acquisition 3D shutter (e.g. collimation)
• Volume Subtraction and voxel shift
• Stabilized point in all volumes (e.g. cardiac wall motion, stent stabilized)
• Catheter tracking trajectory in one volume
• 2D-3D blending presentation (3D conic projection on 2D fluoroscopy)
N-Dimensional Presentation State
• Work Item 2008-04-C. Addresses needs of multi-modalities
• Led by Working Group 11, participation of Web3D Consortium and other
DICOM working groups
• Supplement in progress...
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X-Ray 3D Angiography – Presentation State
Volume Regions to define 3D shutter
Punch Holes
Clipping Planes
Frames
Proposal for Volume Region Sequence:
• Region Purpose :
DT: “DISPLAY SHUTTER“ or “ROI“
• Region Display Mode :
DT: “DISPLAY“ or “HIDE“
• Region Definition Method : Enumerated Values
• ...
Punch Hole: EV: “ELLIPSE“ or “POLYGON“
Plane:
Orientation, Position, inside or outside
Frame:
EV: “ELLIPSE“ or “POLYGON“ or “BITMAP“
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X-Ray 3D Angiography – Presentation State
Volume Subtraction
Contrast
Mask Frames
Subtracted
Contrast Frames
Proposal for 3D Mask Subtraction Sequence:
• Mask Operation:
• Applicable Volume:
• Mask Volume:
• Mask Voxel Shift:
• Mask Contrast Registration
• Mask Operation Explanation:
• Mask Selection Mode:
• Recommended Viewing Mode:
DT: “Volume Selection“
Pair of Frame Numbers (e.g. N+1, N+k)
Pair of Frame Numbers (e.g. 1, N)
Triple of Float Numbers
4x3 matrix
Free Text
DT: SYSTEM or USER
DT: SUB or NAT
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X-Ray 3D Angiography – Presentation State
Stabilized region in moving volume
Applicable to 4D data (i.e. 3D volumes with time)
Goal: Stabilize the position and orientation of an object during the dynamic view
Proposal for Stabilized Region Sequence:
// contains as many items as number of volumes
• Applicable Volume: Pair of Frame Numbers
• Point:
3D coordinates
• View Angle:
3D view angle
The result is an animated sequence to view the
volumes stabilized at a given point:
• a) with same volume orientation
• b) or changing the orientation of the volume to
keep the same orientation of the object of interest
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X-Ray 3D Angiography – Presentation State
Trajectory Tracking in Volume
Applicable to 3D data
Goal: View the volume along a pre-defined trajectory of the camera
Example:
During the planning phase of a catheterization intervention
• Define a 3D curve from point A to point B inside an artery (i.e. catheter trajectory)
• Define an animated sequence to view the progress of the curve:
a) from the outside of the volume, with
same volume orientation
A
b) from the outside of the volume, changing
the orientation of the volume to be
perpendicular to the tip of the curve
c) from inside the artery (fly-thru) as virtual
endoscopy
B
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2D-3D Blending in X-Ray Angiography (1/2)
X-Ray 3D
Reconstruction
X-Ray Rotational
Acquisition
X-Ray 3D
Storage SOP
Class
X-Ray 2D
Projection
SOP Class
3D View
3D Segmentation
3D Viewing
Settings
new
Segmentation
SOP Class
Conic Projection
2D Presentation
3D Presentation
Same
Frame Of
Reference
2D-3D Blending
X-Ray
Acquisition
System
X-Ray
Acquisition
X-Ray 2D
Projection
SOP Class
2D
View
2D
Presentation
SOP Class
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2D-3D Blending in X-Ray Angiography (2/2)
3D Image (CT, …)
3D View
CT Storage
SOP Class
3D Segmentation
3D Viewing
Settings
new
Segmentation
SOP Class
new
Conic Projection
2D Presentation
3D Presentation
Registration
to Isocenter
System
2D-3D Blending
X-Ray
Acquisition
System
X-Ray
Acquisition
X-Ray 2D
Projection
SOP Class
2D
View
2D
Presentation
SOP Class
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Conclusion
Enhanced XA (2D)
Supplement 139 in Letter Ballot. Informative (DICOM Part 17)
Will facilitate the adoption of the Enhanced XA SOP Class (Sup 83)
XA Presentation State (2D)
Supplement 140 in Final Text
X-Ray 3D Angiography
New IOD approved in Standard 2007 (Supplement 116)
Application cases (Informative) - Work In Progress
N-D Presentation State
N-D Presentation State - Work In Progress
To get involved in WG-02 developments:
contact chairman at [email protected]
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