Automatic Exposure Control (Aec) - AGFA DR 400 User Manual

190 | DR 400 | Bucky

Automatic Exposure Control (AEC)

The use of an AEC ensures optimal and reproducible image quality
independent of the radiation, the object exposed or other factors.
The AEC has three sensor elements (ionization chambers).
The AEC is mounted in the bucky of the radiographic table and the
radiographic wall stand between the grid and the detector or cassette. It is
fixed and not intended to be removed from the bucky by the customer. If an
exposure shall be done without AEC, the free exposure workflow has to be
used, where the detector or cassette is placed outside the bucky, or the AEC
has to be switched off in the Software Console.
The AEC is calibrated during production with default values. The AEC can be
recalibrated during installation, defining three custom cut-off doses for the
AEC sensors, to suit user preferences or to balance out the three AEC sensors.
The default orientation of the AEC sensors on the table corresponds to a
patient orientation with the head on the left side. The orientation is decided
during installation of the system. A label is delivered with the system to
indicate the patient orientation on the table.
The shortest irradiation time when using AEC is 2 ms.
Related Links
Automatic Exposure Control (AEC) Technical Data
Additional Labeling of the radiographic table
3231E EN 20210708 1530
Note: The AEC sensor is located in the bucky above the cassette
or detector and may be slightly visible on the image. This applies
most to flat field exposures and less to diagnostic images.
on page 243
on page 47