MOSAIQ User's Guide - UCSF Radiation Oncology

MOSAIQ User’s Guide
Changing Image Color
1. In the toolbox, click to change the image tint to green.
2. Click to restore the image to grayscale.
Inverting the Image Contrast Scale
1. Click to reverse the image intensity map, basically reversing the colors.
Reversing the image intensity map changes the image from positive
to negative and vice versa, much like looking at a photograph and
then looking at its negative.
2. Click to restore image intensity map to its original configuration.
Using the Window and Level Tool
You can also manually change the contrast (window) and brightness (level) of an image using
the Window and Level tool. Changes to image window and level do not change the image
pixel data, just how the data appears.
1. Position your mouse pointer over the red bar on the left to change the mouse pointer to
.
2. Click and drag the red bar slowly all the way to the left to lengthen the image contrast,
adding darker shades of grey, but keeping the brightest pixels constant.
3. Click and drag the red bar on the right side of the tool slowly to the far right to lengthen
the image contrast again, adding brighter shades of grey.
4. Click and drag each of the red bars back to their original position to shorten the
contrast, showing fewer shades of grey.
5. Click and drag the yellow bar slowly all the way to the right to change the window
center, increasing the brightness.
6. Click and drag the yellow bar slowly all the way to the left to change the window center,
decreasing the brightness.
7. Experiment with the brightness and contrast controls to obtain your desired contrast or
detail.
Using Filters
1. Click adjacent to the Filter field.
2. Click Sharpen to apply the sharpen filter, defining the edges of the image.
3. Click adjacent to the Filter field, then click Reduce Noise to remove noise in the
image.
4. Click adjacent to the Filter field, then click AHE to apply the Adaptive Histogram
Equalization filter.
170 Copyright 2010, Elekta Impac Software
LUGMSQ0002/4.0/23-Sep-2010