i-CAT FLX V Series, Technical Manual, Page: 30 / 122

3-18
i-CAT FLX Technical Guide
032-0328-EN Rev K
11. Record the Air HU Mean value in the table below. Recorded values should fall within the
ranges.
12. Remove measurement by clicking on it to select it, then press the
Delete
key on the
keyboard.
NOTE:
Do not close image. This image is also used for the Uniformity Test.
Uniformity Evaluation
The Uniformity test is used to check that image density measurements are consistent in
all areas within the field of view.
13. In the upper right corner view, click where the vertical and horizontal cursor lines cross
and drag to the center of the water height and width.
NOTE:
To better view measurements, select to turn off display information.
14. Select to activate HU tool.
15. Draw a box with an area of approximately 400 mm
2
in the upper left quadrant of the
phantom image, as shown below.
a. Click and release at starting point. A red circle displays.
b. Move cursor to draw box.
c. When correct area is displayed (approximately 400 mm
2
), click to set box and
display HU information.
d. Click on measurements and drag as needed to move them out of the way so that
additional boxes can be drawn.
Measured Values Water Air
Mean
Expected Values 0 (-70 to +70) -1000 (-1000 to -950)