17 | P a g e
Adjusting the histogram
After the Equal Vertical tool is used, it is best to adjust the brightness and contrast to get the best detail
out of the x-ray. This is the second tool that should be used after taking a panoramic x-ray. This tool is called
the Histogram.
As seen in the examples above, there are three small green triangles at the bottom of the tool. Moving
these triangles side-to-side will adjust the brightness and contrast values of the image. To move the triangles
simply left-click the triangle using the mouse and drag them side to side. When the triangle is in its desired
position, release the left-mouse button. Be careful not to overlap the triangles when adjusting them, otherwise
the software will not know which triangle to move. To best learn this tool, adjust the triangles and notice the
difference in the image after the adjustment. Utilizing this tool can greatly improve the quality of the x-rays.
The farthest right triangle, usually seen as green outline with black in the center, controls the contrast or
darkness (dark levels) of the image. The default position for this triangle is against the far right side. This should
be the first triangle to be moved.
The middle triangle, usually seen as the green outline with blue center, controls the brightness of the
image. The default position for this triangle is right in the center. This is the second triangle to be moved.
The farthest left triangle, usually seen as green outline with white center, controls the whiteness (white
levels) of the image. The default position for this triangle is against the far left side. This triangle should
normally be ignored and kept in its default position.
Since every individual has a different opinion about getting the best detail with an x-ray, there is no set
of rules of how the x-ray should look. Therefore the best way to decide this ask the doctor (or talk amongst the
group) and decide what key parts in the x-ray are needed to be in focus and given attention to. The person that
will usually take the x-ray needs to be aware of what is needed, otherwise most (if not every) x-ray will not be to
the doctor’s liking. This is why communication is key when viewing/saving x-rays.