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Functionality is available in the Pro edition
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Tractography results cannot be used for establishing a diagnosis |
The DICOM Viewer allows you to show the result of the fiber tractography for the series of Diffusion MRI. Fig. 5.12 shows tracks which are the result of brain tractography.
The tracks which are the result of tractography are refered to as fibers in the DICOM Viewer interface and in the User Manual.
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Functionality is available in the Pro edition
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The tractography will be performed automatically for the series made in the DTI mode when you open it in the Multiplanar Reconstruction Mode. To display fibers over the images not made in the DTI mode (for the same study):
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Functionality is available in the Pro edition
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If you want to make only some fibers visible, specify the areas through which the fibers pass as visible or invisible. Use the ROI tools from the Fibers panel. The operation of these tools is similar to using ROI from the toolbar at the top of the window (see Section 2.15.5). Note that you cannot use the ROI tools from the top toolbar to adjust the visibility of the fibers.
To make some fibers visible:
When you create the first ROI, a group is automatically created for it. New ROIs are added to the same group.
The flag to the left of the name of the ROI group and the Base fibers group allows you to display or hide the relevant fibers. If the box is checked, then the fibers are displayed. This flag does not affect the visibility of fibers, it only allows you to temporarily hide them, for example, to adjust the visibility of other fiber groups.
To make other fibers visible without changing the visibility of the fibers previously made visible:
To show the image containing a certain ROI, select this ROI in the table and click the Find ROI
button on the Fibers panel.
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Functionality is available in the Pro edition
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By default, fibers are colored in accordance with the DEC (Direction Encoded Color) scheme. It
means that the color of a fiber depends on its direction. You can set color for each group manually.
Color is indicated by the pictogram in the DEC mode and by the single-colored pictogram if
the color is set manually.
To set color manually, uncheck the DEC box for the group, double-click the left mouse button on the color pictogram and in the dialog button that appears, select the color or leave the default color.
To switch to the DEC scheme, check the DEC box.
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Functionality is available in the Pro edition
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The DICOM Viewer allows to display scalar maps for series made in the DTI mode. The following types of maps are available:
By default, the maps are not displayed. To display the map, select the target map on the drop-down list Scalar map type (Fig. 5.15). To hide the map, select an empty value from the list.
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Functionality is available in a separate module which is activated in the Pro edition for an extra fee
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The DICOM Viewer provides an opportunity to save ROI and groups in files with .spj extension. The procedure for saving and opening files is described in Section 6.9. When a file is opened, the data contained in it is added to the data from the Fibers panel.