How to Outline Objects Using Brush 2D
Brush 2D allows you to outline areas of interest manually and is recommended for correcting structures. Brush 2D does not use interpolation, so you have complete control over each voxel and you can correct the structure on a slice-by-slice basis.
Center and zoom to the ROI using the Zoom, Scroll and Pan functions.
Select Brush from the Brush 2D menu.
Outline the shape of the structure in one reconstruction (e.g., the coronal view).
Outline the shape of the structure in another reconstruction (e.g., the sagittal view).
Use Scroll to move from one slice to the next.