From the Mammography toolbar, click the Invert
W/L on Anatomy button, 
.
The anatomical greyscale inversion tool inverts the window and level settings for the breast image only. The remaining area in the image remains unchanged. The anatomical greyscale inversion tool requires a mammography plug-in module license.
To invert the greyscale slope of the selected breast image, do the following:
From the Mammography toolbar, click the Invert
W/L on Anatomy button, .
To identify the breast data, the tool requires successful generation of the skin line. If the skin line could not be calculated, a warning pops up and there is no change to the window/level settings.