User Manual Part 2

110
2852 A EN 20070205
DRYSTAR AXYS
6 After the image is printed, the system will display all measured optical density
values:
The displayed values (that have to be monitored) represent the following steps on the
test film:
7 Record the density levels on Chart 1 (‘DrystarAXYS Determination of Operating
Levels’). Refer to “Charts for mammography QC (optional)” on page 155.
8 Press the Confirm key to return to the main menu.
9 Repeat steps 1 through 8 once a day for five consecutive days, as indicated on
the Drystar AXYS Chart 1.
10 Calculate the average value of the densities from the five images. These values
represent operating levels or aim values, for each density.
Operating Level
Value (Macbeth units)
(according to NEMA
standards XR 23-2006)
Base + Fog
the density value of the
Base + Fog step
0. 22 ± 0.03
Low density
the density value of the
low density step
0.45 ± 0.07
Mid density
the density value of the
mid density step
1.20 ± 0.15
High density
the density value of the
high density step
2.20 ± 0.15
WARNING: If the mid density value does not meet or exceeds the
recommended values, the cause must be found and the problem
solved before any further clinical films can be printed.
WARNING: Refer to “Preventive maintenance schedule” on
page 121 and “Maintaining image quality and resolving image
quality problems” on page 258 (Reference manual), or call your
local Agfa service organization.
DD: 1.56
(Densitometer=MB924)
The density levels are displayed, e.g:
Max D: x.x Hi D: 2.23
Mid D: 1.13 Lo D: 0.4
Base+Fog: 0.20
DD: x.xx