1 / 13

DICOM WG-02 Advances in X-Ray Angiography Projection Imaging and 3D SPIE Medical Imaging

This presentation outlines the advancements in X-Ray Angiography in DICOM, including 3D shutter, volume subtraction, trajectory tracking, and 2D-3D blending. It also discusses the needs for 3D angiography presentation and proposed techniques for presentation state, volume regions, volume subtraction, stabilized region, and trajectory tracking.

lahr
Download Presentation

DICOM WG-02 Advances in X-Ray Angiography Projection Imaging and 3D SPIE Medical Imaging

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. DICOM WG-02 Advances in X-Ray Angiography Projection Imaging and 3D SPIE Medical Imaging 2010, San Diego Authors: Heinz Blendinger Siemens Healthcare Bas Revet Philips Healthcare Francisco Sureda GE Healthcare (Chair DICOM WG-02)

  2. 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

  3. Overview of X-Ray Angiography in DICOM Work in Progress Approved in the Standard X-Ray Acquisition Follow-up of IHE REM Profile Supp 94: Radiation Dose Reporting CR-DX Dose Reporting 2D Projection Images Supp 83: Enhanced XA/XRF Supp 139-LB: Enhanced XA Informative Annex Supp 140: Presentation State 3D Reconstruction X-Ray 3D Informative Annex Supp 116: X-Ray 3D Storage N-Dimensional Presentation State

  4. Workflow in X-Ray N-Dimensional Presentation Enhanced XA Storage SOP Class X-Ray Acquisition Procedure X-Ray 3D Storage SOP Class Reconstruction Procedure In progress N-D Presentation State SOP Class Calibration Data Proprietary X-Ray Calibration Procedure Visualization Visualization X-Ray Acquisition System X-Ray 3D Reconstruction System 3D Visualization Systems

  5. X-Ray 3D Angiography – Rotational Acquisition Optimized 3D Reconstruction 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 Frame #2: X-ray settings 2 Geometry settings 2 Frame #1: X-ray settings 1 Geometry settings 1

  6. 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...

  7. X-Ray 3D Angiography – Presentation State Punch Holes Clipping Planes Frames Volume Regions to define 3D shutter • 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“

  8. X-Ray 3D Angiography – Presentation State Contrast Subtracted Contrast Frames Mask Frames Volume Subtraction • Proposal for 3D Mask Subtraction Sequence: • Mask Operation: DT: “Volume Selection“ • Applicable Volume: Pair of Frame Numbers (e.g. N+1, N+k) • Mask Volume: Pair of Frame Numbers (e.g. 1, N) • Mask Voxel Shift: Triple of Float Numbers • Mask Contrast Registration 4x3 matrix • Mask Operation Explanation: Free Text • Mask Selection Mode: DT: SYSTEM or USER • Recommended Viewing Mode: DT: SUB or NAT

  9. 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

  10. 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 • 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 A B

  11. 2D-3D Blending in X-Ray Angiography (1/2) X-Ray 3D Reconstruction X-Ray Rotational Acquisition 3D Viewing Settings 3D View X-Ray 2D Projection SOP Class X-Ray 3D Storage SOP Class new 3D Segmentation Segmentation SOP Class Conic Projection 2D Presentation 3D Presentation Same Frame Of Reference 2D-3D Blending X-Ray 2D Projection SOP Class 2D View 2D Presentation SOP Class X-Ray Acquisition X-Ray Acquisition System

  12. 2D-3D Blending in X-Ray Angiography (2/2) 3D Image (CT, …) 3D Viewing Settings 3D View CT Storage SOP Class new 3D Segmentation Segmentation SOP Class new Conic Projection 2D Presentation 3D Presentation Registration to Isocenter System 2D-3D Blending X-Ray 2D Projection SOP Class 2D View 2D Presentation SOP Class X-Ray Acquisition X-Ray Acquisition System

  13. 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 francisco.sureda@ge.com

More Related