Table of Contents

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Graph Manager

The Graph Manager presents hierarchical anatomical structure information using a radial tree display that is synchronized with the atlas image in the Viewer workspace. The graph display provides an alternate means of navigating the atlas hierarchy. Rather than selecting the structures from the atlas image, the user can select the corresponding nodes in the graph display. Any atlas delineations that identify the selected node’s structure or substructures will be highlighted the same color in the atlas display. Likewise, when the structures are selected directly in the Viewer atlas image, the corresponding node is highlighted in the graph.

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User Interface

Selecting nodes

Selecting a parent node in the graph automatically selects all child substructures, but selecting a structure in the atlas image in the Viewer workspace only selects the node for the structure that was actually clicked.

• Single selection: Left mouse double-click a node in the graph to select or deselect it. If selected, the node is highlighted in the graph (and in the atlas) and all other nodes are grayed out.
• Multiple selection: Shift + left mouse double-click adds or removes the current node from the selected list. The selected node(s) are highlighted in the graph (and in the atlas).
• Clear the selection: Left mouse double-click in an empty area in the graph will clear the selected list of nodes. All nodes will return to their default color.

Changing the view

• Left mouse-drag on an empty area of the graph to reposition the graph.
• Scroll the Mouse wheel to zoom in or out.

Sending to search workspace

• Right mouse double-click anywhere on the graph to send the currently selected node names to the keyword search subworkspace. The system will switch to the keyword search subworkspace and the node names are entered in the keyword text box.

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Loading Graph Data

The graph data is loaded as part of an atlas file. To load a graph as part of an atlas, a ".ilf" formatted label file must be specified as the “src” attribute of the “labelhierarchy” element in the atlas file (".atlas"). The atlas can then be loaded by selecting the atlas file using the file browser pulldown at the lower left hand corner of the Viewer workspace. As the atlas files are loaded, the IOManager will read the labels from the .ilf file and create a mbGraph object for the display.