7.4. Centerline building mode

You can build the centerline in three methods. To select a method click the arrow on the right side of the New Vessel button and select the appropriate method. The current method is marked with a flag.

1. Building by one point. In this mode the line is built in both directions from the starting point for a maximum distance. If the vessel splits along the construction line, then the line is built in an arbitrary branch. To build the line, click the left mouse button at the starting point.
2. Building by two points. In this mode, the line is built from the starting point to the end point. To build the line, click at the starting and end points.
3. Automatic building by one point. This mode differs from the first one in that the line is built in both directions from the starting point to the bifurcation points, i.e. to the points at which the vessel splits or two vessels converge. To build the line, click the left mouse button at the starting point.

If the centerline for the selected points cannot be built, then the message Centerline building has failed appears.

The DICOM Viewer adds the required number of intermediate points to set the centerline. For more accurate positioning of the line, move these points manually with the mouse while holding the left button.

If the line is not completely built, then select the point up to which you want to extend the line and click in at it. The line will be built from the nearest existing point.

If the line is not built correctly, then start building it again by clicking on the New vessel button or delete part of the line. To delete part of the line, delete a segment. The segment is deleted along with the shorter part of the line adjacent to the point.

To delete a segment, right-click on the first point of the segment and select the Remove segment item. The shorter part of the centerline is removed from one side of the point and the section between this and the next point from the other side.

To delete a point, move the cursor over this point so that all the points are highlighted, right-click and in the context menu and select the Remove point command.

To add a point, move the cursor to the place where you want to add a point, right-click and in the context menu and select the Add point command. The centerline will change so as to pass through a new point.

The initial research data or the volume reconstruction data can be used for building. To select the data source, click the arrow on the right side of the New vessel button and select the appropriate source.