Load and visualisation of multiple volumes

---

The Data module

This module shows all the nodes present in the scene.

Figure 1: File

Data Module

The function of this module is to list the objects of the current scene, and it allows generic operations on them (search, rename, delete, move) within the MRML structure tree. It shows the objects (nodes) as they are arranged in the scene and allows to have an overview of it.

Figure 2: Module Data

The module window has three tabs:

• Subject hierarchy: it shows the hierarchy of the different elements (Figure 2)
• Transform hierarchy: it shows the different transformations in the scene (Figure 6)
• All nodes: it displays the list of all nodes present at the scene

Contextual menus

The icon to the left of each element indicates its type, which can be: model, scene view, volume, DICOM data.

Elements

Right-clicking on an item opens the context menu (Figure 3) to interact with elements of the scene:

Figure 3: Moodule Data - context menu object

• Create child folder: it creates a container, dependent on the selected element, where to locate the desired elements. To move an item, simply hold down the left mouse button on it and drag it to its new position.
• Clone: it creates a copy of the selected item.
• Export to DICOM: used to export the selected item in DICOM format, or the complete scene if the corresponding circular checkbox is checked at the top of the window. (Figure 2)

Figure 4: Module Data - DICOM

• Rename: to change the name of the selected item
• Delete: Delete the selected item from the scene. Caution: when executing this command no confirmation menu is opened, so if an accidental click occurs the item is deleted.
• Edit properties: it transports us to the moduleModels to modify the options of the element
• Select role: to select the behavior of the element

Folders

Right-clicking on an item opens the context menu (Figure 5) to interact with elements of the scene:

Figure 5: Moodule Data - context menu folder

Only the context menu items other than those described in the object context menu are described.

• Create child folder: create a subfolder
• Show volumes in branch: it highlights the folder elements in the 3D view window
• Convert folder to subject: it changes the behavior of the folder within the scene, making it a subject.
• Convert folder to study: it reverts the previous change, or modifies a subject to folder

Transform hierarchy tab

Figure 6: Module Data - Transform hierarchy

This tab displays the display and coordinate transformations in the scene. By means of the contextual menu you can modify, create new ones and consult their properties, which takes us to the module Transforms.

Documentation in Slicer.org

[Data Module] (en inglés)

Module Volumes

The function of this module is to adjust the representation parameters of the 3D view, allowing to change between different color tables, rendering engines and preset value sets (these come depending on the type of data source: CAT, MRI...). If there are different volumes loaded in the scene, it is possible to work individually with the selected one from this module.

Just before the Volume Information section, inside the module panel, there is a dropdown box to select the volume among all those present in the scene (Figure 7). One of the possible options is to rename and delete the volume.

Section: Volume Information

Figure 7: Module Volume Rendering

From among the parameters shown in this module we have:

• Dimension of the image: the first two numbers give the width x length of each section and the third number refers to how many sections there are, this size is indicated in the IJK coordinate system.
• Spacing: it can be assimilated to the size of a voxel, although it actually indicates the space between the center of consecutive voxels in the RAS system.
• Image origin coordinates: where the origin coordinate of the IJK system is located
• The transformation matrix IJK-to-RAS: the transformation matrix that relates these two coordinate systems
• Scanning direction: along which axis and in which direction the sections of the volume have been taken

Advanced rendering and lighting parameters can also be managed:

(Figure 8)

Figure 8: Module Volume Rendering - Advanced

Documentation in Slicer.org

[Volumes] (en inglés)

---

MENU