Windowing, Thresholding, and more
To help with visualizing your volumes and performing annotations, you can apply several Filters to your volumes. The filters are available on the left side of the top bar - they are the first set of tools displayed.
You can window your volumes by pressing
LEFT CLICKdragging on any viewport - up/down to adjust window level, left/right to adjust window width.
You see the current window settings/modify them by selecting the window tool on the top left of the tool bar. When windowing is selected, the settings will be displayed in the context panel.
To speed up segmentation of your volumes, you can threshold a volume by setting an upper and lower bound on the intensities/HU values that will get segmented.
To enable thresholding, select the threshold filter from the top bar. You can manually adjust the threshold bounds using the slider/input fields.
You can also use the range selector which allows you to interactively select the bounds - with the range selector toggled,
left clickany part of a viewport to include it in the threshold range,
right clickto exclude it.
You can smooth your volumes to remove noise from the data and simplify segmentation tasks. Smoothing works well when used alongside thresholding or other segmentation tools like region growing.
Select the Smoothing filter from the top bar and enable/disable it from the context panel.