Hounsfield units

 

Hounsfield annotations, , includes the average pixel value and the standard deviation. The text displayed after drawing an area to calculate the average pixel value includes the standard deviation of the pixel values within the region.

 

Use the Hounsfield annotation tool  to display a single pixel value in an image. Select the Hounsfield tool from the annotation toolbar and position the cursor over the pixel value needed.  The pixel value is displayed in the lower right corner of the status bar, along the bottom of the screen. If the status bar is hidden from view, activate it from the View/Toolbars menu.