Editor

Módulo Editor

This module is complemented by the Segment Editor. Both serve to segment volumes, but the Segment Editor can be considered as an advanced version of the Editor. What changes between them are the funcionality of the available tools. In fact in the module screen recommends the use of the Segment Editor module. (Figure 1)

Figure 1: Module Editor

Sections

When the module Editor opens a floating window prompts which table of colours goes to use in the data processing.

A color table associates scalar values of the medical image with the color to be used in its representation in Slicer. Certain medical modalities, such as CT, provide absolute values that allow to establish the correlation between tissue types and scalar values of the image. However, in other modalities like MRI, this does not happen because the values are relative; it is necessary to perform this correlation semi-automatically.

There is more information about the different color tables available by default in Slicer within the module documentation [Colors], in the ' Categories section.

Create and Select Label Maps

• Master Volume: Contains the original images of the scanner. You can select from any of the different volumes loaded in the scene.
• Merge Volume: Contains the representations of the scene, to which the corresponding color map has been applied.

See .

Edit Selected Label Map

First row

Figure 2: Module Editor - Toolbar row 1

• Default Tool: allows selection of elements
• Erase Label: Erase changes made to the image
• Paint Effect: Color the area you click and drag on the mouse. When selecting this tool, the following options appear under the two toolbars: the label of the label, the radius of the brush tip and the way the applied color will behave. It works by clicking with the left button of the mouse and dragging, to make a freehand drawing.
• Draw Effect: similar to the previous one but based on straight lines that are defined based on clicks.
• Wand Effect: Select all pixels of similar color, according to the tolerance set, when clicked.
• Level Tracing Effect: delimits with a line all the pixels with a value similar to the one selected and left-click exports the contour line to the label map.
• Rectangle Effect: make a selection with rectangular shape by clicking with the left button and dragging, releasing closes the rectangle.
• Identify Islands Effect: applies a unique label to the entire interconnected area within the label map. In case there are other areas with the same values, but not connected to the selected one, they will not be altered or selected.
• Change Island Effect: applies a different color to the closed contour that is selected.
• Remove Islands Effect: removes all unlabeled pixels / voxels within an area that is tagged and replaces them with ones of identical value to those in the tagged area. It is used to eliminate holes / noise within the selections.
• Save Island Effect: behaves just like the previous tool and also allows saving the selection for later uses.

segunda fila

Figure 3: Module Editor - Toolbar row 2

• Erode Effect: contrae la selección el número de píxeles establecido en las opciones de la herramienta.
• Dilate Effect: expande la selección el número de píxeles establecido en las opciones de la herramienta.
• Grow Cut Effect: consiste en un algoritmo que segmenta en base a múltiple etiquetas de color para separar automáticamente las áreas pertenecientes a las estructuras anatómicas seleccionadas.
• Watershed from Marker Effect: algoritmo similar al anterior, se utiliza cuando se dispone de objetos con bordes bien definidos.
• Threshold Effect: define los rangos para los umbrales de valores con los que se va a trabajar a la hora de pintar, por ejemplo. Se define un umbral superior e inferior.
• Change Label Effect: para cambiar cada píxel/voxel en el mapa de etiquetas de entrada al valor del mapa de etiquetas de salida (del master volume al merge volume).
• Make Model Effect: crea modelos de forma automática para todos aquellos valores diferentes a cero en el mapa de etiquetas.
• Fast Marching Effect: permite seleccionar mediante un algoritmo de segmentación, zonas de valores similares a los definidos como valor semilla de forma automática.

Documentación en Slicer.org

[Editor] (en inglés)