ScienceGL Inc. 

Volume_4D Advanced Medical CT/MRI Visualization Software: 4D to stereo 3D package

Quick Demo Help
 
 

GENERAL

ScienceGL offers 4D stack data visualization / analysis software solutions for medical Computed Tomographpy (CT), Magnetic Resonance Imaging (MRI), Ultrasound Imaging. Our software is packed with unique interactive measurement tools that lets you to discover more things in less time. This version also supports stereo 3D display.

1. Install

Run **.MSI Microsoft Standard Installation file. Find the icon with shortcut to program on your desktop. Run the program.

2. Start

Run the program. The Computed Tomographpy (also known as computerized tomography, CT). The multiple CT stack image is loaded automatically. See the 3D isosurface default screen with 2 iso-surfaces auto constructed. Observe default mouse interaction mode. Drag the mouse within 3D screen to perform rotation. Adjust stereo perception with "eye dX" eye separation buttons on the left side of the main form. Zoom 3D with mouse and Alt key pressed. Pan 3D with mouse and Shift key pressed. Press "Demo" button to see some built-in operations.


Fig.1. Screen Shot 4D image stack (CT data ) to 3D isosurface constructor is ON, default settings. CT data is loaded, isosurfaces are constructed at default threshold levels.
Red Surface is solid, while cyan is semitransparent.

3. Basic Options

3.1 Zoom

Use Main toolbar buttons for zooming 3D in an out.

Alternatively you can use Menu>Zoom or zoom with Alt-mouse drag.

3.2 Quick View

Use Main toolbar buttons for changing view point.

Buttons, from left to right: 1) Default view, 2) top side, 3) down side, 4) left side, 5) right side.

3.3 Lightning

Use Main toolbar buttons for changing Light options.

Buttons, from left to right: 1) More light, 2) Less light, Reflective light On/Off.
Use Light position adjustment to see the surfaces in inclined light that is useful for better perception of the surface features.

Mouse drag within the Light Position Tool to change light position, this option is useful to observe slight differences of the 4D data set.

3.4 Navigation

Use Main toolbar buttons for navigation mouse mode: Rotate, Pan, Animation, Clipped rotation, etc.,m changing Light options.

Buttons, from left to right:
1) Animation On/Off, use pop-up submenu to select animation speed
2) Mouse Rotate mode,
    This is the main mode that permits you to pick up the objects in 3D scene, and rotate scene while no object clicked
    The default mode
3) Mouse Pan Mode, Pan the scene with right mouse drag
4) Mouse Rotate Clipped Mode
    In this mode mouse will rotate the surfaces relative to coordinate system and relative poi the tools too
    It is useful in combination with clip planes and clip Cube (see tools below)
5) Reset all angles to default

4. Tools

4.1 Overview

There is a set of unique interactive tools for measurements in 3D screen, left tool bar can be used to call some of them.
Tools are moved by left mouse in 3D scene. To unable tool pick up use either Main mouse mode or Rotate Clipped mouse mode.

Buttons:
1) Axis On/Off
2) Clip Plane On/Off
3) Stereo Marker On/Off
4) Report tool
5) Distance measuring tool On/Off
6) Volume measuring cube tool, also used for volume clipping
7) Mouse position XYZ read out
8) Isosurface constructor

4.2 Clip Plane

Click left toolbar button 2. See the plane. Adjust the plane position by left mouse.
NOTE: Main mouse mode as shown below.


Fig.2. Screen Shot 4D CT. Clip plane ON. Use mouse in 3D screen to adjust plane position. Main mouse mode active.

Now you can hide the plane Menu>Planes>Y Plane for better visibility.


Fig.3. 4D CT image stack to 3D iso-surface shot. Clip plane Off while Clip continue to be active.

Select Rotate Clipped Mode from main toolbar as shown below. Activate Axis (optional). Rotate surfaces relative to clip plane with right mouse.


Fig.4. Clip plane Off while Clip continue to be active.

You can examine surfaces using double plane (dicer) that is activated from Menu>Planes>Clip with 2 planes. From same submenu enable Y cut plane, enable clipping, enable double plane clipping.


Fig.5. 4D CT image stack to 3D iso-surface shot. Plane is active. Clip plane is ON. Clip with 2 plane mode is On.

Try to move the slicer plane with left mouse.

4.3 Stereo Marker

Click left toolbar button 3 to activate stereo marker. Alternatively you can click "marker label" to do so.


Fig.6. 4D CT image stack to 3D iso-surface shot. Stereo Marker ON. Moving marker in 3D space is demonstrated.

Use marker pad to move marker in all directions (XY left pad, Z right pad) as shown below.

 

4.3 Distance Measuring Tool

Click left toolbar button 3 to activate stereo marker. Alternatively you can click "marker label" to do so. Enable report with left toolbar button 4 as shown below.


Fig.7. Plane is OFF. Clip is ON. Distance Marker is ON. Report is active.

Disable clip plane to access inside surface features with mouse. Click anywhere on surface to drop the marker. Move mouse over other surface points to measure Distance and XYZ components of the distance. If you have both stereo marker and distance marker active you will read out marker to marker distance as well. See below in report window and status bar.


Fig.8. Distance Marker ON. Stereo marker ON. Report active.

Use Rotate clipped, Axis and Zoom/Pan for exploring data more closely.


Fig.9. Distance Marker ON, Axis ON, Clip plane active, Zoom used to see inside surface. Rotation Clipped is active.

4.4 Volume Measuring Tool

Disable clip plane. Click Volume Cube button within left toolbar. By default the volume cube is clipping the surfaces. You can turn clip with volume On/Off from Menu>Tools>Volume Clip.


Fig.10. Volume Cube Tool ON. Clip with volume is ON.

Try to resize volume in all directions by moving walls and anchors with left mouse.
NOTE: White anchors and cyan anchors behave differently.
Try to move volume as a whole with right mouse.

4. Isosurface Constructor

You can skip this session if you work with default surfaces.

You will see isosurface tools separate for 1st and 2nd surface construction. d level for both surfaces.


Fig.11. Surface constructor ON. Blend option OFF, i.e. surface 2 is solid.

You can construct 2 surfaces with any voxel level of interest that is called threshold. Following options are available:

You can select threshold either by slider or typing in corresponding text box.
Press OK to construct isosurface layer.
Use Blend option to set the transparency of the second cyan layer.
See effect of threshold level selection below.


Fig.12. Threshold level from 130 to 160 on byte (255 levels total) voxel stack, level is increasing from left to right.
 
 

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