OMNERA®
0073-095-418-EN Rev. 5.1
Operator´s Manual
Page 64
2020-09-25
3.6.6 Operating Automatic Collimator
3.6.6.1 Startup Mode
At start-up of the System the collimator is defined to
Automatic mode
ACSS, light field to
max, SID to 110 cm and filter to the first defined.
3.6.6.2 Top and Bottom Centring
The collimator light field size can be top or bottom centered against the maximum image
area.
This means that the upper border of the collimator light field is aligned with the top of the
maximum image area, or that the lower of the collimator light field is aligned with the bottom
of the maximum image area. The stand will automatically move to keep the alignment of the
top or bottom of the maximum image area when the collimator light field is increased or
decreased.
The functionality of top and bottom centring is only available in
Wall mode
or
Wall Flexible
mode
With top centring active is the light field
always as high as it can be regarding size
and position for the image
.
Fig. 3-35 Top and bottom centering of the collimator light field
3.6.6.3 Change Working Mode
The collimator can be operated in either
Automatic
or
Manual mode
.
These modes can easily be changed on the collimator (button 6) or the collimator control
handle (button B), see Fig. 3-32
. When the mode is changed
from
Manual mode
to
Automatic mode
, the settings are restored to the settings at the latest
change from
Automatic mode
to
Manual mode
.
Manual mode
will be active until the
M-
button is pushed once more, or until
New patient
is
selected.
Manual mode
The purpose with
Manual mode
is to be able to adjust the collimator light field outside the
imaging unit.
– There are no restrictions for exposure outside active image area.
Automatic mode
– Exposure is not allowed when the light field is outside the active image area.
– The maximum light field size is restricted to the maximum active area of the imaging unit.
3.6.6.4 Restore Last Settings
The collimator settings can be restored to the last settings that were sent to the collimator.
Press and hold the mode change control (button 6 on the collimator, or button B on the colli-
mator control handle, see Fig. 3-32
) for about 2 seconds.
Summary of Contents for OMNERA 400A
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Page 140: ...OMNERA 0073 095 418 EN Rev 5 1 Operator s Manual Page 134 2020 09 25 Waste Disposal ...
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