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 cells (ionization chambers).
The AEC is mounted in the bucky of the radiographic table and the
radiographic wall stand between the grid and the detector. 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 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 cells, to suit user preferences or to balance out the three AEC cells.
The default orientation of the AEC cells 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.
Note: The AEC cell is located in the bucky above the detector
and may be slightly visible on the image. This applies most to
flat field exposures and less to diagnostic images.
Related Links
Automatic Exposure Control (AEC) Technical Data on page 197
160 | Valory (system with floor mounted column) | Bucky
0426A EN 20220804 1858
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