Canon OMNERA 400T, Operator'S Manual

Page: 80 / 166

OMNERA® 0180-095-418-EN Rev. 6.1
Operator´s Manual
Page 72 2020-09-18
3.15.3.3 Operating the automatic collimator, table
Startup Mode
At startup of the system, the collimator is defined to Automatic mode , light field to Maximum ,
SID to 110 cm and filter to the first defined.
Finding the right position
The programmed SID value used for calculating the size of the light field is shown in the dis-
play of the automatic collimator. The correct position of the X-ray tube support is reached
when the true SID value corresponds with the programmed SID value shown on the auto-
matic collimator display.
The SID value is shown when wallstand or table tracking is activated, the detector/detector
holder is in a horizontal position and the tube alpha angle is between –45 and +45 degrees.
When tracking is not activated and the detector holder is not horizontal, a measuring tape
may be used to determine the SID.
When performing examinations at the wallstand with the detector holder in a vertical position
the positioning indexes at the ceiling rails can be used in order to fast find the correct
position.
Automatic collimator light
When the tube stand is tracking against the wallstand or when the table top is released, the
collimator light will automatically be turned on.
Changing working mode
The collimator can be operated in either Automatic or Manual mode . The purpose of the
Manual mode is to be able to adjust the collimator light field outside the detector.
The mode can easily be changed on the collimator (button 6) or at the collimator control han-
dle (button H).
Automatic mode
The maximum light field size is restricted to the detector size.
Detector size
When tracking Table/WS is activated;
Adjust the collimator light field to the detector size by pushing and holding the M-button on
the collimator control handle (button H) or on the collimator (button 6) for approximately 2
seconds.
SID
Changing SID
The SID used for calculating the size of the light field can be changed manually with button 9
on the collimator.
The new SID value will then be used for calculating the field size instead of the pre-pro-
grammed SID value.
Note!
The System steps between pre-set values: 100, 115, 150, 180, 200.
Pre-programmed SID values
If the SID values for each APR are pre-programmed at the Canon NE user interface, this will
override the
collimator default value .
User Interfaces
Automatic collimator (option)