Automatic Exposure Control (Aec) (Optional) - Planmeca Proline EC Panoramic User Manual

AUTOMATIC EXPOSURE CONTROL (AEC) (OPTIONAL)

12 AUTOMATIC EXPOSURE CONTROL (AEC)
(OPTIONAL)
Selecting the optical density
A
36 Planmeca Proline EC Panoramic X-ray
NOTE
NOTE
NOTE
NOTE
AUTO
CTL
B
C
NOTE
The Automatic Exposure Control (AEC) adjusts the
exposure values in order to achieve the desired optical
density and contrast on the x-ray image.
The basic idea of the AEC is to measure the patient
radiation transparency during the exposure and to
adjust the correct kV and mA values in order to
achieve the desired optical density and contrast on the
x-ray image.
Before starting the exposure the user can select the
density level, patient size and kV and mA values. The
patient size preselection is used to assist the system to
start the exposure with the best imaging values. The
maximum kV value is 80 kV and the minimum value is
60 kV. The maximum mA value is 12 mA and the mini-
mum value is 4 mA.
During the exposure, the continuous AEC function
automatically adjusts the correct exposure values.
Make sure that the cassette is AEC compatible,
i.e. marked with text "AEC COMPATIBLE".
The AEC is not compatible with phosphorus
plates. Use only X-ray film.
The AEC can only be used in the panoramic
mode, not with sinus, temporomandibular
joint or cephalometric exposures.
The vertical sector "A" can not be deselected
when using AEC.
Enter the Automatic Exposure Control (AEC) mode by
pressing and holding down the auto key until the indi-
cator light comes on.
The current optical density and the patient size are
shown on the exposure time display for one second
when the AEC mode is entered.
Press the control key. The indicator light will come on.
Select the desired optical density by pressing the
respective vertical sector selection key:
- A: light exposure
- B: normal exposure
- C: dark exposure.
The letter indicating the selected density is shown on
the exposure time display.
If the optical density is not selected the last
time selected density is used
.
User's manual