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Multi-Planar Reconstruction (MPR) Mode

Overview​

OmegaAI includes a feature known as Multi-Planar Reconstruction (MPR) M ode, essential for viewing complex imaging data in three orthogonal planes: axial, sagittal, and coronal.

Activate MPR Mode​

  1. Starting Condition: Ensure you are within a CT-Scan study on OmegaAI. MPR Mode requires a multi-frame series with locational data suitable for reconstruction.

  2. Accessing MPR Mode:

    • Navigate to the viewport displaying the relevant series.

    • Open the viewport menu. If the series supports MPR reconstruction, you will find an option to activate MPR Mode.

    • Select the MPR Mode option. If unavailable, the series does not support MPR and will not display the option.

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Interface and Navigation in MPR Mode​

Upon entering MPR Mode, the interface adjusts to display three viewports, each corresponding to one of the orthogonal planes:

  • Axial Viewport: Marked with a red dot at the top right corner.

  • Sagittal Viewport: Marked with a green dot.

  • Coronal Viewport: Marked with a yellow dot.

Each viewport will also display a full-screen crosshair with color-coded lines correlating with the view they represent:

  • Red Line: Axial

  • Green Line: Sagittal

  • Yellow Line: Coronal

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Highlighted Viewport Interactions​

  • When the user double-clicks on any viewport while in MPR Mode, that viewport expands and renders in Highlighted Mode for focused viewing.

  • Double-clicking again on the same viewport exits the Highlighted Mode and returns to the standard three-view layout.

Tools and Functionalities​

  • Enabled Tools: Stack scroll, pan, zoom, rotate, and window level adjustments are active.

  • Disabled Tools: Some tools might be disabled in this mode to ensure stability and performance.

  • Frame Navigation: Use the mouse wheel to scroll between frames. Frame number and total frames are indicated via overlay annotations.

  • Crosshair Interactivity:

    • Square Node (near center): Drag to adjust the thickness of the Maximum Intensity Projection (MIP) slab in that specific plane.

    • Circular Node (further from center): Drag to rotate the axes around the center.

Obliquity Lines in MPR Mode​

OmegaAI's MPR mode now features two obliquity lines for more precise control and orientation adjustments within PET/CT studies.

Key Functionalities:

  • Independent Movement: Clicking on a line’s circle node enables independent rotation, allowing one line to move without affecting the other.
  • Synchronous Movement: Clicking outside the circle rotates both lines together, maintaining alignment for broader adjustments.
  • View-Specific Control: Adjustments in one viewport (e.g., axial) do not impact the obliquity lines in other views (e.g., sagittal or coronal), preserving view-specific configurations.