Canon OMNERA 400A, Operator'S Manual

Page: 66 / 156

OMNERA® 0073-095-418-EN Rev. 5.1
Operator´s Manual
Page 60 2020-09-25
3.6 Automatic Collimator Control
3.6.1 General
Collimator settings will be controlled from the selected examination program (fully APR con-
trolled). That is, the light field size and the filter can be preset for each examination.
The main features of the automatic collimator control are:
• All examinations can be programmed with collimator settings including free techniques as
e.g. Auto position mode and Free mode .
• A memory function remembers the light field size when a mode is changed from Manual to
Automatic , and back. This function makes it easy to return to the same size after checking
the alignment and centring of the System by using the light field.
• The light field size is dynamically updated from the SID value, i.e. the light field size is kept
constant with increasing or decreasing SID.
• Function for fast adjustment of light field to max image size and back (toggling).
• Collimator filters; 0. 0.1, 0.2, 0.3 mm Cu.
• Function for cancellation of manual changes and return to preset settings for the
examination.
• Automatic light on function when tracking to Wallstand is active and when the table top is
moved.
• Collimator control handles available for remote control of light field, light on/off and mode.
• Function for top and bottom alignment Wallstand.
This function makes it easy to find the best position and reduce the dose in e.g. an upper
thorax examination, when the patient is sitting in a wheelchair and the image unit cannot
be lowered, or for a standing knee examination were the tube is required to go low.
• Overall, the automatic collimator function is designed to ease the examination procedure,
support the operator, decrease the patient dose and increase the patient through-put of
the System.
3.6.2 Basic Flow of Operation
Select an examination program from the Image system.
• The collimator changes to
Automatic mode .
• At the start of a new examination, the Automatic mode is indicated on the collimator
(ACSS).
• The collimator changes filter to the programmed filter for the chosen examination program.
• The collimator changes field size (width, height) to the programmed field size.
3.6.3 Exposure
Exposure is not allowed while the collimator adjusts settings.
3.6.4 DAP (option)
If a DAP meter is included the System, the Dose Area Product will be presented in the Imag-
ing system.
Checks and settings can be done by the service software, see ‘Installation and Service Man-
ual’ , Chapter 4, Installation.
User Interface
Automatic Collimator Control