Visualization Workspace

In the visualization workspace, you can visualize images, meshes and fibers in single view or multiple views.

Each component of this workspace can be found in each imagery workspace:

• Database column: used to retrieve data from database, just select the data and then drag and drop it into the views area.
• Views area: used to visualize the data, it can have one or multiple views.
• Tools column: contains toolboxes to control images or views attributes, rendering modes, etc.

Database column

The components of the database area are:

• Database Filter: a filtering area at the top of this column to select easily your patient/data.
• Database Tree: data in italics are temporary imported, they will be removed at the closing of the application. Save them to keep them in the database.
• Double-click on a data, or drop it on the view area to display it.
• Right-click to export, remove, view, or display the list of metadata of the selected data. You can also permanently save a temporary data with "Save".
• Thumbnail: a thumbnail area to display a small image of the current data selected in the database.

Views area

The view is where the data is display either in 2D or 3D, there can be several views inside, and several data can be displayed in a view.

Annotations in the view

On the image in 2D you can find:

• Middle of the borders: the directions Left (L), Right (R), Posterior (P), Anterior (A), Superior (S), Inferior (I) are indicated .
• Top-left corner:
• the image size in pixels
• the voxel size in millimeters on x and y direction
• the x and y voxel coordinates of the currently hovered voxel and its intensity value
• the x and y position of the currently selected voxel in millimeters with respect to the world coordinates system
• and the window/level values that control the transfer function.
• Bottom-left corner:
• the currently zooming percentage
• the currently selected slice and the total number of slices along the z direction
• and the voxel position along z axis with respect to the world coordinate system.
• Top Right corner: the patient, study and file names.
• Bottom right: the currently displayed view plane.

 

When the view is in 3D the initial letters of the patient relative directions are shown in a cube in the left corner.

The annotations can be switch on/off in the View settings Toolbox.

In an empty view, there are two buttons in the middle of the view to open data (mha, vtk, etc) or Scenes.

View's toolbar

The view has a toolbar made of:

• Slice slider: in 2D, indicate where the current slice is and can be used to go through the slices.
• Tool button: use this button to open data, split the view, maximize a view, save a scene, display an histogram, etc.
• Close button: to close the view.
• Views tabs: above the slider, you can add tabs (Ctrl+T or "+"), move, or remove (Ctrl+W or "x").

The tool button: 

Scenes

A scene is a snapshot of what's inside your current view. It records the position of the camera as well as the rendering parameters of each layer displayed in the view, such as its current attributes, LUT, dynamic range, or opacity.

• Save a scene: in your current view, use the "Tools" button: "Save scene" and choose a directory where the scene is going to be saved.
• Load a scene: you can load your data by clicking the 2nd button in the middle of your empty view "Open a scene from your system". Select the globalMapping.xml file of your scene.

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Tools column

The tools column includes only settings tools in the Visualization workspace. In the other imagery workspaces, you will find also dedicated toolboxes.

 

 

 

 

 

Mouse interaction

Where you can manage some attributes as:

• zooming: used to zoom in/out the image.
• slicing: used to change the displayed slice.
• windowing: contrast/brightness, control the window width/level of the look-up table (not on mesh).
• panning: move the position of the data in the view.
• measuring: activates a millimeters-ruler tool between two selected points in the view.

 

View settings

To switch the orientation of your displayed data: Axial, Coronal, Sagittal and 3D. Several rendering 3D modes are proposed for non-mesh volumes. This tool allows also to hide/show axes, ruler, annotations and a scalar bar on your current view.

 

Layer settings

Displays a list of the layers of the view. You can hide/show a layer by clicking on its thumbnail and change the opacity by moving the slider.
If your current data is a:

• volume: you can change the minimum and maximum intensity value, Lut and preset of your data.
• mesh: you can change the rendering mode (WireFrame, Surface, Points / no edge), color, and attributes of your data.

For meshs, you can double-click on a layer to center the mesh in the view.

 

Link properties

The Link view properties and Link layer properties toolboxes allow to link several views. CTRL-click several views to select them.

For instance if you link the Intensity of two views, you can select only one of them and moving the pixels intensity will move the second view's intensity also.

3D controls

While on the 3D viewing you can interact (rotate, pan, etc.) with objects in the view. The interactions and respective button to push are:

• Rotation. Move the mouse while pushing the left mouse button.
• Panning. Move the mouse while pushing the SHIFT+left mouse button (or middle button) 
• Spinning. Move the mouse while pushing the CTRL + left mouse button. 
• Zooming. Just scroll the middle button, no need to move the mouse.

4D controls

When the user drags and drops a sequence, the time toolbox will appear in the View settings toolbox. The user can play, step forward/backward, stop the sequence or change the speed of the sequence.

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