A set of predefined linear and non-linear intensity transformation functions are also selectable via the Intensity tables popup menu. The default value is set to the relative mode. The absolute mode can be very useful in the case of well calibrated images, such as CT images. The saved intensity setting appears subsequently as an item in the popup menu and can be restored upon request. One has the choice to display the images in greyscale or in pseudocolor scales via the Color tables popup menu.
Black saturation is also selectable.
This option allows one to black out the pixels which have a higher intensity than the maximum intensity selected on the control panel. The next figure gives an example of a few overlays. This type of annotation attached to an ROI can be changed, moved or deleted like a normal annotation. To delete overlays, select the desired overlays and press backspace on the keyboard or apply the Cut command of the Edit menu. Overlays selection Selected overlays can be moved, resized or deleted.